基于Java接口回调详解

public interface BackInterface {
	void backMethod();	
}

public class Teacher implements BackInterface {
	
	//因为老师要告诉学生做课堂练习,所以这个传一个学生的引用
	private Student student;
	
	public Teacher(Student student){
		this.student = student;
	}
	//老师告诉学生做课堂练习
	public void doEvent(){
		System.out.println("老师让学生做练习...");
		student.doPractice(this);
	}
	//用于接收接口回调的消息
	@Override
	public void backMethod() {
		System.out.println("老师接收到学生做完课堂练习的消息");
	} 
}

public class Student {
	
	//学生做课堂练习,并告诉老师
	public void doPractice(BackInterface BackInterface) {
		System.out.println("学生做练习...");
		System.out.println("学生告诉老师做完练习...");
		BackInterface.backMethod();
	}
}

public class BackDemo {
	public static void main(String[] args) {
		Teacher teacher = new Teacher(new Student());
		teacher.doEvent();
	}
}

new Thread(new Runnable() {
			@Override
			public void run() {
			}
		}).start();

package com.java.demo.callBack_Interface; 
public interface CallBack {
    void getHValue(String s);
}

package com.java.demo.callBack_Interface; 
public class ApplyPro implements CallBack{  
    public void getHValue(String sre) {
        String ss=sre;
        System.out.print(ss);
    }
}

package com.java.demo.callBack_Interface; 
public class TestC  {
    CallBack callback;
    public TestC(CallBack callBack)
    {
        this.callback=callBack;
    }
    public  void getSpeak(){
        String str="开始表演";
        callback.getHValue(str);
    }
}

package com.java.demo.callBack_Interface; 
public class TestMain {
    public static void main(String[] args){
        TestC tc=new TestC(new ApplyPro());
        tc.getSpeak();
    }
}