代码:

1. private static void eraseLine(CtMethod method, int lineNumberToReplace){
   
2.   // let's erase the sysout "Two"
   
3.   // Access the code attribute
   
4.   CodeAttribute codeAttribute = method.getMethodInfo().getCodeAttribute();
   
5. 
   
6.   // Access the LineNumberAttribute
   
7.   LineNumberAttribute lineNumberAttribute = (LineNumberAttribute)    codeAttribute.getAttribute(LineNumberAttribute.tag);
   
8. 
   
9.   // Index in bytecode array where the instruction starts
   
10.   int startPc = lineNumberAttribute.toStartPc(lineNumberToReplace);
    
11. 
    
12.   // Index in the bytecode array where the following instruction starts
    
13.   int endPc = lineNumberAttribute.toStartPc(lineNumberToReplace+1);
    
14. 
    
15.   // Let's now get the bytecode array
    
16.   byte[] code = codeAttribute.getCode();
    
17.   for (int i = startPc; i < endPc; i++) {
    
18.    // change byte to a no operation code
    
19.    code = CodeAttribute.NOP;
    
20.   };
    
21.     }