Decompile about the implementation of java in cmd

Decompile software to others by means of the target program (such as executable programs) a "reverse analysis, research" work to derive the idea of ​​other people's software products are used by, principles, structures, algorithms, processes, methods of operation design elements, in certain cases the source may be deduced. Decompiled as reference for their own software, or directly for their own software products. For example, the following code is executed decompile

. 1  public  class StringBuffer {
 2      public  static  void main (String [] args) {
 . 3 the StringBuffer = S new new the StringBuffer ( "the Hello" );
 . 4 System.out.println ( "modified string:" );
 . 5  Change (S );
 . 6  System.out.println (S);
 . 7 System.out.println ( "after reverse string:" );
 . 8  Reverse (S);
 . 9  System.out.println (S);
 10      }
 . 11      public  static  void Change (the StringBuffer TEMP) {
 12 is         temp.append ( "World !!") .insert (0, "MRMr.Song") .Delete (0,2 );
 13 is  
14      }
 15      public  static  void Reverse (the StringBuffer TEMP) {
 16          temp.reverse ();
 . 17      }
 18 is  }
 . 19  // .append () + corresponding to the string
 20 is  // iNSERT () with two arguments, the first is the insertion position of the second insertion element or the content
 21 is  // Delete () has two parameters are deleted start and end positions
 22  // Reverse reversed

The results are shown

 

 In the course of the first to switch disks, because they can not cross over the execution, then replace directory with javac .java program execution, with the implementation of java source files, you can see the final result with javap decompile the .class file execution, see sequential method during program execution, is conducive to their own programming, if it is someone else's program, others are more conducive to understand the structure of the program, for their own use