Bytecode (Javassist API)

java.lang.Object
- javassist.bytecode.Bytecode

All Implemented Interfaces:: java.lang.Cloneable, Opcode

public class Bytecode
extends java.lang.Object
implements java.lang.Cloneable, Opcode

A utility class for producing a bytecode sequence.

A Bytecode object is an unbounded array containing bytecode. For example,

 ConstPool cp = ...;    // constant pool table
 Bytecode b = new Bytecode(cp, 1, 0);
 b.addIconst(3);
 b.addReturn(CtClass.intType);
 CodeAttribute ca = b.toCodeAttribute();

This program produces a Code attribute including a bytecode sequence:

 iconst_3
 ireturn

See Also:: ConstPool, CodeAttribute

Field Summary

Fields
Modifier and Type Field and Description

static CtClass THIS
Represents the CtClass file using the constant pool table given to this Bytecode object.
- Fields inherited from interface javassist.bytecode.Opcode
  AALOAD, AASTORE, ACONST_NULL, ALOAD, ALOAD_0, ALOAD_1, ALOAD_2, ALOAD_3, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ASTORE_0, ASTORE_1, ASTORE_2, ASTORE_3, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DLOAD_0, DLOAD_1, DLOAD_2, DLOAD_3, DMUL, DNEG, DREM, DRETURN, DSTORE, DSTORE_0, DSTORE_1, DSTORE_2, DSTORE_3, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAD_0, FLOAD_1, FLOAD_2, FLOAD_3, FMUL, FNEG, FREM, FRETURN, FSTORE, FSTORE_0, FSTORE_1, FSTORE_2, FSTORE_3, FSUB, GETFIELD, GETSTATIC, GOTO, GOTO_W, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, ILOAD_0, ILOAD_1, ILOAD_2, ILOAD_3, IMUL, INEG, INSTANCEOF, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISTORE_0, ISTORE_1, ISTORE_2, ISTORE_3, ISUB, IUSHR, IXOR, JSR, JSR_W, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDC_W, LDC2_W, LDIV, LLOAD, LLOAD_0, LLOAD_1, LLOAD_2, LLOAD_3, LMUL, LNEG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSTORE_0, LSTORE_1, LSTORE_2, LSTORE_3, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, STACK_GROW, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, WIDE

Fields
Modifier and Type	Field and Description
`static CtClass`	`THIS` Represents the `CtClass` file using the constant pool table given to this `Bytecode` object.

Constructor Summary

Constructors
Constructor and Description
`Bytecode(ConstPool cp)` Constructs a `Bytecode` object with an empty bytecode sequence.
`Bytecode(ConstPool cp, int stacksize, int localvars)` Constructs a `Bytecode` object with an empty bytecode sequence.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`add(int code)` Appends an 8bit value to the end of the bytecode sequence.
`void`	`add(int b1, int b2)`
`void`	`add(int b1, int b2, int b3, int b4)`
`void`	`add32bit(int value)` Appends a 32bit value to the end of the bytecode sequence.
`void`	`addAload(int n)` Appends ALOAD or (WIDE) ALOAD_<n>
`void`	`addAnewarray(CtClass clazz, int length)` Appends ICONST and ANEWARRAY.
`void`	`addAnewarray(java.lang.String classname)` Appends ANEWARRAY.
`void`	`addAstore(int n)` Appends ASTORE or (WIDE) ASTORE_<n>
`void`	`addCheckcast(CtClass c)` Appends CHECKCAST.
`void`	`addCheckcast(java.lang.String classname)` Appends CHECKCAST.
`void`	`addConstZero(CtClass type)` Appends an instruction for pushing zero or null on the stack.
`void`	`addDconst(double d)` Appends DCONST or DCONST_<n>
`void`	`addDload(int n)` Appends DLOAD or (WIDE) DLOAD_<n>
`void`	`addDstore(int n)` Appends DSTORE or (WIDE) DSTORE_<n>
`void`	`addExceptionHandler(int start, int end, int handler, CtClass type)` Adds a new entry of `exception_table`.
`void`	`addExceptionHandler(int start, int end, int handler, int type)` Adds a new entry of `exception_table`.
`void`	`addExceptionHandler(int start, int end, int handler, java.lang.String type)` Adds a new entry of `exception_table`.
`void`	`addFconst(float f)` Appends FCONST or FCONST_<n>
`void`	`addFload(int n)` Appends FLOAD or (WIDE) FLOAD_<n>
`void`	`addFstore(int n)` Appends FSTORE or FSTORE_<n>
`void`	`addGap(int length)` Appends the length-byte gap to the end of the bytecode sequence.
`void`	`addGetfield(CtClass c, java.lang.String name, java.lang.String type)` Appends GETFIELD.
`void`	`addGetfield(java.lang.String c, java.lang.String name, java.lang.String type)` Appends GETFIELD.
`void`	`addGetstatic(CtClass c, java.lang.String name, java.lang.String type)` Appends GETSTATIC.
`void`	`addGetstatic(java.lang.String c, java.lang.String name, java.lang.String type)` Appends GETSTATIC.
`void`	`addIconst(int n)` Appends ICONST or ICONST_<n>
`void`	`addIload(int n)` Appends ILOAD or (WIDE) ILOAD_<n>
`void`	`addIndex(int index)` Appends a 16bit value to the end of the bytecode sequence.
`void`	`addInstanceof(java.lang.String classname)` Appends INSTANCEOF.
`void`	`addInvokedynamic(int bootstrap, java.lang.String name, java.lang.String desc)` Appends INVOKEDYNAMIC.
`void`	`addInvokeinterface(CtClass clazz, java.lang.String name, CtClass returnType, CtClass[] paramTypes, int count)` Appends INVOKEINTERFACE.
`void`	`addInvokeinterface(CtClass clazz, java.lang.String name, java.lang.String desc, int count)` Appends INVOKEINTERFACE.
`void`	`addInvokeinterface(int clazz, java.lang.String name, java.lang.String desc, int count)` Appends INVOKEINTERFACE.
`void`	`addInvokeinterface(java.lang.String classname, java.lang.String name, java.lang.String desc, int count)` Appends INVOKEINTERFACE.
`void`	`addInvokespecial(boolean isInterface, int clazz, java.lang.String name, java.lang.String desc)` Appends INVOKESPECIAL.
`void`	`addInvokespecial(CtClass clazz, java.lang.String name, CtClass returnType, CtClass[] paramTypes)` Appends INVOKESPECIAL.
`void`	`addInvokespecial(CtClass clazz, java.lang.String name, java.lang.String desc)` Appends INVOKESPECIAL.
`void`	`addInvokespecial(int clazz, java.lang.String name, java.lang.String desc)` Appends INVOKESPECIAL.
`void`	`addInvokespecial(java.lang.String clazz, java.lang.String name, java.lang.String desc)` Appends INVOKESPECIAL.
`void`	`addInvokestatic(CtClass clazz, java.lang.String name, CtClass returnType, CtClass[] paramTypes)` Appends INVOKESTATIC.
`void`	`addInvokestatic(CtClass clazz, java.lang.String name, java.lang.String desc)` Appends INVOKESTATIC.
`void`	`addInvokestatic(int clazz, java.lang.String name, java.lang.String desc)` Appends INVOKESTATIC.
`void`	`addInvokestatic(java.lang.String classname, java.lang.String name, java.lang.String desc)` Appends INVOKESTATIC.
`void`	`addInvokevirtual(CtClass clazz, java.lang.String name, CtClass returnType, CtClass[] paramTypes)` Appends INVOKEVIRTUAL.
`void`	`addInvokevirtual(CtClass clazz, java.lang.String name, java.lang.String desc)` Appends INVOKEVIRTUAL.
`void`	`addInvokevirtual(int clazz, java.lang.String name, java.lang.String desc)` Appends INVOKEVIRTUAL.
`void`	`addInvokevirtual(java.lang.String classname, java.lang.String name, java.lang.String desc)` Appends INVOKEVIRTUAL.
`void`	`addIstore(int n)` Appends ISTORE or (WIDE) ISTORE_<n>
`void`	`addLconst(long n)` Appends LCONST or LCONST_<n>
`void`	`addLdc(int i)` Appends LDC or LDC_W.
`void`	`addLdc(java.lang.String s)` Appends LDC or LDC_W.
`void`	`addLdc2w(double d)` Appends LDC2_W.
`void`	`addLdc2w(long l)` Appends LDC2_W.
`void`	`addLload(int n)` Appends LLOAD or (WIDE) LLOAD_<n>
`int`	`addLoad(int n, CtClass type)` Appends an instruction for loading a value from the local variable at the index `n`.
`int`	`addLoadParameters(CtClass[] params, int offset)` Appends instructions for loading all the parameters onto the operand stack.
`void`	`addLstore(int n)` Appends LSTORE or LSTORE_<n>
`int`	`addMultiNewarray(CtClass clazz, int dim)` Appends MULTINEWARRAY.
`int`	`addMultiNewarray(CtClass clazz, int[] dimensions)` Appends MULTINEWARRAY.
`int`	`addMultiNewarray(java.lang.String desc, int dim)` Appends MULTINEWARRAY.
`void`	`addNew(CtClass clazz)` Appends NEW.
`void`	`addNew(java.lang.String classname)` Appends NEW.
`void`	`addNewarray(int atype, int length)` Appends NEWARRAY for primitive types.
`void`	`addOpcode(int code)` Appends an 8bit opcode to the end of the bytecode sequence.
`void`	`addPrintln(java.lang.String message)` Appends instructions for executing `java.lang.System.println(message)`.
`void`	`addPutfield(CtClass c, java.lang.String name, java.lang.String desc)` Appends PUTFIELD.
`void`	`addPutfield(java.lang.String classname, java.lang.String name, java.lang.String desc)` Appends PUTFIELD.
`void`	`addPutstatic(CtClass c, java.lang.String name, java.lang.String desc)` Appends PUTSTATIC.
`void`	`addPutstatic(java.lang.String classname, java.lang.String fieldName, java.lang.String desc)` Appends PUTSTATIC.
`void`	`addRet(int var)` Appends RET.
`void`	`addReturn(CtClass type)` Appends ARETURN, IRETURN, .., or RETURN.
`int`	`addStore(int n, CtClass type)` Appends an instruction for storing a value into the local variable at the index `n`.
`java.lang.Object`	`clone()` Creates and returns a copy of this object.
`byte[]`	`copy()`
`int`	`currentPc()` Returns the length of bytecode sequence that have been added so far.
`byte[]`	`get()` Returns the produced bytecode sequence.
`ConstPool`	`getConstPool()` Gets a constant pool table.
`ExceptionTable`	`getExceptionTable()` Returns `exception_table`.
`int`	`getMaxLocals()` Gets `max_locals`.
`int`	`getMaxStack()` Gets `max_stack`.
`int`	`getSize()`
`int`	`getStackDepth()` Returns the current stack depth.
`void`	`growStack(int diff)` Increases the current stack depth.
`void`	`incMaxLocals(int diff)` Increments `max_locals`.
`int`	`length()` Returns the length of the bytecode sequence.
`int`	`read(int offset)` Reads a signed 8bit value at the offset from the beginning of the bytecode sequence.
`int`	`read16bit(int offset)` Reads a signed 16bit value at the offset from the beginning of the bytecode sequence.
`int`	`read32bit(int offset)` Reads a signed 32bit value at the offset from the beginning of the bytecode sequence.
`void`	`setMaxLocals(boolean isStatic, CtClass[] params, int locals)` Sets `max_locals`.
`void`	`setMaxLocals(int size)` Sets `max_locals`.
`void`	`setMaxStack(int size)` Sets `max_stack`.
`void`	`setStackDepth(int depth)` Sets the current stack depth.
`CodeAttribute`	`toCodeAttribute()` Converts to a `CodeAttribute`.
`void`	`write(int offset, int value)` Writes an 8bit value at the offset from the beginning of the bytecode sequence.
`void`	`write16bit(int offset, int value)` Writes an 16bit value at the offset from the beginning of the bytecode sequence.
`void`	`write32bit(int offset, int value)` Writes an 32bit value at the offset from the beginning of the bytecode sequence.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - THIS
```
public static final CtClass THIS
```
    Represents the CtClass file using the constant pool table given to this Bytecode object.
- Constructor Detail
  - Bytecode
```
public Bytecode(ConstPool cp,
                int stacksize,
                int localvars)
```
    Constructs a Bytecode object with an empty bytecode sequence.
    The parameters stacksize and localvars specify initial values of max_stack and max_locals. They can be changed later.
    
    Parameters:
    
    cp - constant pool table.
    
    stacksize - max_stack.
    
    localvars - max_locals.
  - Bytecode
```
public Bytecode(ConstPool cp)
```
    Constructs a Bytecode object with an empty bytecode sequence. The initial values of max_stack and max_locals are zero.
    
    Parameters:
    
    cp - constant pool table.
    
    See Also:
    
    setMaxStack(int), setMaxLocals(int)
- Method Detail
  - clone
```
public java.lang.Object clone()
```
    Creates and returns a copy of this object. The constant pool object is shared between this object and the cloned object.
  - getConstPool
```
public ConstPool getConstPool()
```
    Gets a constant pool table.
  - getExceptionTable
```
public ExceptionTable getExceptionTable()
```
    Returns exception_table.
  - toCodeAttribute
```
public CodeAttribute toCodeAttribute()
```
    Converts to a CodeAttribute.
  - length
```
public int length()
```
    Returns the length of the bytecode sequence.
  - get
```
public byte[] get()
```
    Returns the produced bytecode sequence.
  - getMaxStack
```
public int getMaxStack()
```
    Gets max_stack.
  - setMaxStack
```
public void setMaxStack(int size)
```
    Sets max_stack.
    This value may be automatically updated when an instruction is appended. A Bytecode object maintains the current stack depth whenever an instruction is added by addOpcode(). For example, if DUP is appended, the current stack depth is increased by one. If the new stack depth is more than max_stack, then it is assigned to max_stack. However, if branch instructions are appended, the current stack depth may not be correctly maintained.
    
    See Also:
    
    addOpcode(int)
  - getMaxLocals
```
public int getMaxLocals()
```
    Gets max_locals.
  - setMaxLocals
```
public void setMaxLocals(int size)
```
    Sets max_locals.
  - setMaxLocals
```
public void setMaxLocals(boolean isStatic,
                         CtClass[] params,
                         int locals)
```
    Sets max_locals.
    This computes the number of local variables used to pass method parameters and sets max_locals to that number plus locals.
    
    Parameters:
    
    isStatic - true if params must be interpreted as parameters to a static method.
    
    params - parameter types.
    
    locals - the number of local variables excluding ones used to pass parameters.
  - incMaxLocals
```
public void incMaxLocals(int diff)
```
    Increments max_locals.
  - addExceptionHandler
```
public void addExceptionHandler(int start,
                                int end,
                                int handler,
                                CtClass type)
```
    Adds a new entry of exception_table.
  - addExceptionHandler
```
public void addExceptionHandler(int start,
                                int end,
                                int handler,
                                java.lang.String type)
```
    Adds a new entry of exception_table.
    
    Parameters:
    
    type - the fully-qualified name of a throwable class.
  - addExceptionHandler
```
public void addExceptionHandler(int start,
                                int end,
                                int handler,
                                int type)
```
    Adds a new entry of exception_table.
  - currentPc
```
public int currentPc()
```
    Returns the length of bytecode sequence that have been added so far.
  - read
```
public int read(int offset)
```
    Reads a signed 8bit value at the offset from the beginning of the bytecode sequence.
    
    Throws:
    
    java.lang.ArrayIndexOutOfBoundsException - if offset is invalid.
  - read16bit
```
public int read16bit(int offset)
```
    Reads a signed 16bit value at the offset from the beginning of the bytecode sequence.
  - read32bit
```
public int read32bit(int offset)
```
    Reads a signed 32bit value at the offset from the beginning of the bytecode sequence.
  - write
```
public void write(int offset,
                  int value)
```
    Writes an 8bit value at the offset from the beginning of the bytecode sequence.
    
    Throws:
    
    java.lang.ArrayIndexOutOfBoundsException - if offset is invalid.
  - write16bit
```
public void write16bit(int offset,
                       int value)
```
    Writes an 16bit value at the offset from the beginning of the bytecode sequence.
  - write32bit
```
public void write32bit(int offset,
                       int value)
```
    Writes an 32bit value at the offset from the beginning of the bytecode sequence.
  - add
```
public void add(int code)
```
    Appends an 8bit value to the end of the bytecode sequence.
  - add32bit
```
public void add32bit(int value)
```
    Appends a 32bit value to the end of the bytecode sequence.
  - addGap
```
public void addGap(int length)
```
    Appends the length-byte gap to the end of the bytecode sequence.
    
    Parameters:
    
    length - the gap length in byte.
  - addOpcode
```
public void addOpcode(int code)
```
    Appends an 8bit opcode to the end of the bytecode sequence. The current stack depth is updated. max_stack is updated if the current stack depth is the deepest so far.
    Note: some instructions such as INVOKEVIRTUAL does not update the current stack depth since the increment depends on the method signature. growStack() must be explicitly called.
  - growStack
```
public void growStack(int diff)
```
    Increases the current stack depth. It also updates max_stack if the current stack depth is the deepest so far.
    
    Parameters:
    
    diff - the number added to the current stack depth.
  - getStackDepth
```
public int getStackDepth()
```
    Returns the current stack depth.
  - setStackDepth
```
public void setStackDepth(int depth)
```
    Sets the current stack depth. It also updates max_stack if the current stack depth is the deepest so far.
    
    Parameters:
    
    depth - new value.
  - addIndex
```
public void addIndex(int index)
```
    Appends a 16bit value to the end of the bytecode sequence. It never changes the current stack depth.
  - addAload
```
public void addAload(int n)
```
    Appends ALOAD or (WIDE) ALOAD_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addAstore
```
public void addAstore(int n)
```
    Appends ASTORE or (WIDE) ASTORE_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addIconst
```
public void addIconst(int n)
```
    Appends ICONST or ICONST_<n>
    
    Parameters:
    
    n - the pushed integer constant.
  - addConstZero
```
public void addConstZero(CtClass type)
```
    Appends an instruction for pushing zero or null on the stack. If the type is void, this method does not append any instruction.
    
    Parameters:
    
    type - the type of the zero value (or null).
  - addIload
```
public void addIload(int n)
```
    Appends ILOAD or (WIDE) ILOAD_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addIstore
```
public void addIstore(int n)
```
    Appends ISTORE or (WIDE) ISTORE_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addLconst
```
public void addLconst(long n)
```
    Appends LCONST or LCONST_<n>
    
    Parameters:
    
    n - the pushed long integer constant.
  - addLload
```
public void addLload(int n)
```
    Appends LLOAD or (WIDE) LLOAD_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addLstore
```
public void addLstore(int n)
```
    Appends LSTORE or LSTORE_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addDconst
```
public void addDconst(double d)
```
    Appends DCONST or DCONST_<n>
    
    Parameters:
    
    d - the pushed double constant.
  - addDload
```
public void addDload(int n)
```
    Appends DLOAD or (WIDE) DLOAD_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addDstore
```
public void addDstore(int n)
```
    Appends DSTORE or (WIDE) DSTORE_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addFconst
```
public void addFconst(float f)
```
    Appends FCONST or FCONST_<n>
    
    Parameters:
    
    f - the pushed float constant.
  - addFload
```
public void addFload(int n)
```
    Appends FLOAD or (WIDE) FLOAD_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addFstore
```
public void addFstore(int n)
```
    Appends FSTORE or FSTORE_<n>
    
    Parameters:
    
    n - an index into the local variable array.
  - addLoad
```
public int addLoad(int n,
                   CtClass type)
```
    Appends an instruction for loading a value from the local variable at the index n.
    
    Parameters:
    
    n - the index.
    
    type - the type of the loaded value.
    
    Returns:
    
    the size of the value (1 or 2 word).
  - addStore
```
public int addStore(int n,
                    CtClass type)
```
    Appends an instruction for storing a value into the local variable at the index n.
    
    Parameters:
    
    n - the index.
    
    type - the type of the stored value.
    
    Returns:
    
    2 if the type is long or double. Otherwise 1.
  - addLoadParameters
```
public int addLoadParameters(CtClass[] params,
                             int offset)
```
    Appends instructions for loading all the parameters onto the operand stack.
    
    Parameters:
    
    offset - the index of the first parameter. It is 0 if the method is static. Otherwise, it is 1.
  - addCheckcast
```
public void addCheckcast(CtClass c)
```
    Appends CHECKCAST.
    
    Parameters:
    
    c - the type.
  - addCheckcast
```
public void addCheckcast(java.lang.String classname)
```
    Appends CHECKCAST.
    
    Parameters:
    
    classname - a fully-qualified class name.
  - addInstanceof
```
public void addInstanceof(java.lang.String classname)
```
    Appends INSTANCEOF.
    
    Parameters:
    
    classname - the class name.
  - addGetfield
```
public void addGetfield(CtClass c,
                        java.lang.String name,
                        java.lang.String type)
```
    Appends GETFIELD.
    
    Parameters:
    
    c - the class.
    
    name - the field name.
    
    type - the descriptor of the field type.
    
    See Also:
    
    Descriptor.of(CtClass)
  - addGetfield
```
public void addGetfield(java.lang.String c,
                        java.lang.String name,
                        java.lang.String type)
```
    Appends GETFIELD.
    
    Parameters:
    
    c - the fully-qualified class name.
    
    name - the field name.
    
    type - the descriptor of the field type.
    
    See Also:
    
    Descriptor.of(CtClass)
  - addGetstatic
```
public void addGetstatic(CtClass c,
                         java.lang.String name,
                         java.lang.String type)
```
    Appends GETSTATIC.
    
    Parameters:
    
    c - the class
    
    name - the field name
    
    type - the descriptor of the field type.
    
    See Also:
    
    Descriptor.of(CtClass)
  - addGetstatic
```
public void addGetstatic(java.lang.String c,
                         java.lang.String name,
                         java.lang.String type)
```
    Appends GETSTATIC.
    
    Parameters:
    
    c - the fully-qualified class name
    
    name - the field name
    
    type - the descriptor of the field type.
    
    See Also:
    
    Descriptor.of(CtClass)
  - addInvokespecial
```
public void addInvokespecial(CtClass clazz,
                             java.lang.String name,
                             CtClass returnType,
                             CtClass[] paramTypes)
```
    Appends INVOKESPECIAL.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name.
    
    returnType - the return type.
    
    paramTypes - the parameter types.
  - addInvokespecial
```
public void addInvokespecial(CtClass clazz,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKESPECIAL.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[]), Descriptor.ofConstructor(CtClass[])
  - addInvokespecial
```
public void addInvokespecial(java.lang.String clazz,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKESPECIAL. The invoked method must not be a default method declared in an interface.
    
    Parameters:
    
    clazz - the fully-qualified class name.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[]), Descriptor.ofConstructor(CtClass[])
  - addInvokespecial
```
public void addInvokespecial(int clazz,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKESPECIAL. The invoked method must not be a default method declared in an interface.
    
    Parameters:
    
    clazz - the index of CONSTANT_Class_info structure.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[]), Descriptor.ofConstructor(CtClass[])
  - addInvokespecial
```
public void addInvokespecial(boolean isInterface,
                             int clazz,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKESPECIAL.
    
    Parameters:
    
    isInterface - true if the invoked method is a default method declared in an interface.
    
    clazz - the index of CONSTANT_Class_info structure.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[]), Descriptor.ofConstructor(CtClass[])
  - addInvokestatic
```
public void addInvokestatic(CtClass clazz,
                            java.lang.String name,
                            CtClass returnType,
                            CtClass[] paramTypes)
```
    Appends INVOKESTATIC.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name
    
    returnType - the return type.
    
    paramTypes - the parameter types.
  - addInvokestatic
```
public void addInvokestatic(CtClass clazz,
                            java.lang.String name,
                            java.lang.String desc)
```
    Appends INVOKESTATIC.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokestatic
```
public void addInvokestatic(java.lang.String classname,
                            java.lang.String name,
                            java.lang.String desc)
```
    Appends INVOKESTATIC.
    
    Parameters:
    
    classname - the fully-qualified class name.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokestatic
```
public void addInvokestatic(int clazz,
                            java.lang.String name,
                            java.lang.String desc)
```
    Appends INVOKESTATIC.
    
    Parameters:
    
    clazz - the index of CONSTANT_Class_info structure.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokevirtual
```
public void addInvokevirtual(CtClass clazz,
                             java.lang.String name,
                             CtClass returnType,
                             CtClass[] paramTypes)
```
    Appends INVOKEVIRTUAL.
    The specified method must not be an inherited method. It must be directly declared in the class specified in clazz.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name
    
    returnType - the return type.
    
    paramTypes - the parameter types.
  - addInvokevirtual
```
public void addInvokevirtual(CtClass clazz,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKEVIRTUAL.
    The specified method must not be an inherited method. It must be directly declared in the class specified in clazz.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokevirtual
```
public void addInvokevirtual(java.lang.String classname,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKEVIRTUAL.
    The specified method must not be an inherited method. It must be directly declared in the class specified in classname.
    
    Parameters:
    
    classname - the fully-qualified class name.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokevirtual
```
public void addInvokevirtual(int clazz,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKEVIRTUAL.
    The specified method must not be an inherited method. It must be directly declared in the class specified by clazz.
    
    Parameters:
    
    clazz - the index of CONSTANT_Class_info structure.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokeinterface
```
public void addInvokeinterface(CtClass clazz,
                               java.lang.String name,
                               CtClass returnType,
                               CtClass[] paramTypes,
                               int count)
```
    Appends INVOKEINTERFACE.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name
    
    returnType - the return type.
    
    paramTypes - the parameter types.
    
    count - the count operand of the instruction.
  - addInvokeinterface
```
public void addInvokeinterface(CtClass clazz,
                               java.lang.String name,
                               java.lang.String desc,
                               int count)
```
    Appends INVOKEINTERFACE.
    
    Parameters:
    
    clazz - the target class.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    count - the count operand of the instruction.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokeinterface
```
public void addInvokeinterface(java.lang.String classname,
                               java.lang.String name,
                               java.lang.String desc,
                               int count)
```
    Appends INVOKEINTERFACE.
    
    Parameters:
    
    classname - the fully-qualified class name.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    count - the count operand of the instruction.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokeinterface
```
public void addInvokeinterface(int clazz,
                               java.lang.String name,
                               java.lang.String desc,
                               int count)
```
    Appends INVOKEINTERFACE.
    
    Parameters:
    
    clazz - the index of CONSTANT_Class_info structure.
    
    name - the method name
    
    desc - the descriptor of the method signature.
    
    count - the count operand of the instruction.
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addInvokedynamic
```
public void addInvokedynamic(int bootstrap,
                             java.lang.String name,
                             java.lang.String desc)
```
    Appends INVOKEDYNAMIC.
    
    Parameters:
    
    bootstrap - an index into the bootstrap_methods array of the bootstrap method table.
    
    name - the method name.
    
    desc - the method descriptor.
    
    Since:
    
    3.17
    
    See Also:
    
    Descriptor.ofMethod(CtClass,CtClass[])
  - addLdc
```
public void addLdc(java.lang.String s)
```
    Appends LDC or LDC_W. The pushed item is a String object.
    
    Parameters:
    
    s - the character string pushed by LDC or LDC_W.
  - addLdc
```
public void addLdc(int i)
```
    Appends LDC or LDC_W.
    
    Parameters:
    
    i - index into the constant pool.
  - addLdc2w
```
public void addLdc2w(long l)
```
    Appends LDC2_W. The pushed item is a long value.
  - addLdc2w
```
public void addLdc2w(double d)
```
    Appends LDC2_W. The pushed item is a double value.
  - addNew
```
public void addNew(CtClass clazz)
```
    Appends NEW.
    
    Parameters:
    
    clazz - the class of the created instance.
  - addNew
```
public void addNew(java.lang.String classname)
```
    Appends NEW.
    
    Parameters:
    
    classname - the fully-qualified class name.
  - addAnewarray
```
public void addAnewarray(java.lang.String classname)
```
    Appends ANEWARRAY.
    
    Parameters:
    
    classname - the qualified class name of the element type.
  - addAnewarray
```
public void addAnewarray(CtClass clazz,
                         int length)
```
    Appends ICONST and ANEWARRAY.
    
    Parameters:
    
    clazz - the elememnt type.
    
    length - the array length.
  - addNewarray
```
public void addNewarray(int atype,
                        int length)
```
    Appends NEWARRAY for primitive types.
    
    Parameters:
    
    atype - T_BOOLEAN, T_CHAR, ...
    
    See Also:
    
    Opcode
  - addMultiNewarray
```
public int addMultiNewarray(CtClass clazz,
                            int[] dimensions)
```
    Appends MULTINEWARRAY.
    
    Parameters:
    
    clazz - the array type.
    
    dimensions - the sizes of all dimensions.
    
    Returns:
    
    the length of dimensions.
  - addMultiNewarray
```
public int addMultiNewarray(CtClass clazz,
                            int dim)
```
    Appends MULTINEWARRAY. The size of every dimension must have been already pushed on the stack.
    
    Parameters:
    
    clazz - the array type.
    
    dim - the number of the dimensions.
    
    Returns:
    
    the value of dim.
  - addMultiNewarray
```
public int addMultiNewarray(java.lang.String desc,
                            int dim)
```
    Appends MULTINEWARRAY.
    
    Parameters:
    
    desc - the type descriptor of the created array.
    
    dim - dimensions.
    
    Returns:
    
    the value of dim.
  - addPutfield
```
public void addPutfield(CtClass c,
                        java.lang.String name,
                        java.lang.String desc)
```
    Appends PUTFIELD.
    
    Parameters:
    
    c - the target class.
    
    name - the field name.
    
    desc - the descriptor of the field type.
  - addPutfield
```
public void addPutfield(java.lang.String classname,
                        java.lang.String name,
                        java.lang.String desc)
```
    Appends PUTFIELD.
    
    Parameters:
    
    classname - the fully-qualified name of the target class.
    
    name - the field name.
    
    desc - the descriptor of the field type.
  - addPutstatic
```
public void addPutstatic(CtClass c,
                         java.lang.String name,
                         java.lang.String desc)
```
    Appends PUTSTATIC.
    
    Parameters:
    
    c - the target class.
    
    name - the field name.
    
    desc - the descriptor of the field type.
  - addPutstatic
```
public void addPutstatic(java.lang.String classname,
                         java.lang.String fieldName,
                         java.lang.String desc)
```
    Appends PUTSTATIC.
    
    Parameters:
    
    classname - the fully-qualified name of the target class.
    
    fieldName - the field name.
    
    desc - the descriptor of the field type.
  - addReturn
```
public void addReturn(CtClass type)
```
    Appends ARETURN, IRETURN, .., or RETURN.
    
    Parameters:
    
    type - the return type.
  - addRet
```
public void addRet(int var)
```
    Appends RET.
    
    Parameters:
    
    var - local variable
  - addPrintln
```
public void addPrintln(java.lang.String message)
```
    Appends instructions for executing java.lang.System.println(message).
    
    Parameters:
    
    message - printed message.
  - getSize
```
public final int getSize()
```
  - copy
```
public final byte[] copy()
```
  - add
```
public void add(int b1,
                int b2)
```
  - add
```
public void add(int b1,
                int b2,
                int b3,
                int b4)
```

Class Bytecode

Field Summary

Fields inherited from interface javassist.bytecode.Opcode

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

THIS

Constructor Detail

Bytecode

Bytecode

Method Detail

clone

getConstPool

getExceptionTable

toCodeAttribute

length

get

getMaxStack

setMaxStack

getMaxLocals

setMaxLocals

setMaxLocals

incMaxLocals

addExceptionHandler

addExceptionHandler

addExceptionHandler

currentPc

read

read16bit

read32bit

write

write16bit

write32bit

add

add32bit

addGap

addOpcode

growStack

getStackDepth

setStackDepth

addIndex

addAload

addAstore

addIconst

addConstZero

addIload

addIstore

addLconst

addLload

addLstore

addDconst

addDload

addDstore

addFconst

addFload

addFstore

addLoad

addStore

addLoadParameters

addCheckcast

addCheckcast

addInstanceof

addGetfield

addGetfield

addGetstatic

addGetstatic

addInvokespecial

addInvokespecial

addInvokespecial

addInvokespecial

addInvokespecial

addInvokestatic

addInvokestatic

addInvokestatic

addInvokestatic

addInvokevirtual

addInvokevirtual

addInvokevirtual

addInvokevirtual