test.bc

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Method void main(java.lang.String[])
   0 bipush 10        //Push 10 on the stack.
   2 istore_1         //Pop 10 and store it at index 1 of the
                      //local variable table(a).
   3 bipush 20        //Push 20 on the stack.
   5 istore_2         //Pop 20 and store it at index 2 of the
                      //local variable table(b).
   6 bipush 10        //Push 10 for the size of the int array.
   8 newarray int     //Pop 10 and create a new int array with 10
                      //elements. Push the newly created array
                      //reference(arr).
  10 astore_3         //Pop the array reference(arr) and store it
                      //at index 3 of the local variable table.
  11 iconst_0         //Push 0 for the initial value of the loop
                      //counter(i).
  12 istore 4         //Pop 0(i) and store it at index 4 of the
                      //local variable table.
  14 goto 27          //Jump to location 27.
  17 aload_3          //Push the object reference(arr) at index 3
                      //of the local variable table.
  18 iload 4          //Push the value at index 4(i).
  20 iload_1          //Push the value at index 1(a==10).
  21 iload_2          //Push the value at index 2(b==20).
  22 iadd             //Pop the top two values (10 and 20), add
                      //them, and push the result(30).
  23 iastore          //Pop the top three values. Store 30 at
                      //index i in the array(arr).
  24 iinc 4 1         //Increment the loop counter(i) stored at
                      //index 4 of the local variable table by 1.
  27 iload 4          //Push the value at index 4(i).
  29 bipush 10        //Push 10 (the loop terminator value).
  31 if_icmplt 17     //Pop both i and 10. Jump to location 17 if
                      //i is less than 10.
  34 return           //Return from method.