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); } } }
