回调函数

先定义回调接口：

public interface CallBack {

	public void execute();
}

 

public class TestCallBack {

	public static void testCallBackMethod(CallBack callBack){
		System.out.println("Before call back");
		//call back
		callBack.execute();
		System.out.println("After call back");
	}
	
	public static void main(String[] args) {

		TestCallBack.testCallBackMethod(new CallBack(){
			public void execute() {
				System.out.println("callBack1 operation over");
			}
		});
	}

}