jvm 第6章 类和对象

jvm 第6章 类和对象

package jvmgo.book.ch06;


 public class MyObject {


     public static int staticVar;
     public int instanceVar;


     public static void main(String[] args) {
         int x = 32768; // ldc
         MyObject myObj = new MyObject(); // new
         MyObject.staticVar = x; // putstatic
         x = MyObject.staticVar; // getstatic
         myObj.instanceVar = x; // putfield
         x = myObj.instanceVar; // getfield
         Object obj = myObj;
         if (obj instanceof MyObject) { // instanceof
             myObj = (MyObject) obj; // checkcast
             System.out.println(myObj.instanceVar);
         }
     }


 }