useobj.bc

来自「PracticalJAVACode 的源码」· BC 代码 · 共 23 行

Method java.lang.Integer useObject(int)
   0 iconst_5      //Push 5 on the stack.
   1 istore_2      //Pop 5 and store it at index 2 of the local
                   //variable table(i).
   2 iload_2       //Push the value from index 2 of the local
                   //variable table(i).
   3 iload_1       //Push the value from index 1 of the local
                   //variable table(increment).
   4 iadd          //Pop the two top values and push their sum.
   5 istore_2      //Pop the sum and store it at index 2 of the
                   //local variable table(i).
   6 new #4 <Class java.lang.Integer>
                   //Create an object of the Integer class and
                   //push a reference to it.
   9 dup           //Duplicate the top stack value and push it.
  10 iload_2       //Push the value from index 2 of the local
                   //variable table(i).
  11 invokespecial #11 <Method java.lang.Integer(int)>
                   //Pop the top two values and invoke the
                   //constructor for the Integer class passing i.
  14 areturn       //Pop the object reference for the Integer
                   //object and push it on the operand stack of
                   //the invoking method.