testinstanceof.java

JAVA培训用实用代码

class Person extends Object {}
class Student extends Person {}
class Worker extends Person {}

public class TestInstanceOf{
	public void method1(Person e) {
		if (e instanceof Student) {
			// 处理Student类型及其子类类型对象
			System.out.println("this is a Student");
		} else if (e instanceof Worker) {
			//处理Graduate类型及其子类类型对象
			System.out.println("this is a Worker");
		} else {
			//处理Person类型对象
			System.out.println("this is a Person");
		}
	}
	public static void main(String args[]){
		TestInstanceOf t = new TestInstanceOf();
		Worker w = new Worker();
		t.method1(w);
	}
}