Java 之 回调函数实例说明

使用接口         也就是使用多态来实现回调函数       public interface ICallback {  public void   func();}    public class ClassWithCallbackFunction implements ICallback{  public ClassWithCallbackFunction() {  }  public void func(){    System.out.println("cccccccccccccccccc");  }}    public class Caller {  ICallback callback;  public void doCallback() {    callback.func();  }  public void setCallback(ICallback callback) {    this.callback = callback;  }}    public class MainClass {  public MainClass() {  }  public static void main(String[] args) {    Caller caller = new Caller();    caller.setCallback(new ClassWithCallbackFunction() {      public void func() {        System.out.println("aaaaaaaaaa");      }    });    caller.doCallback();  }}  现实中是把doCallback()方法放在setCallback里调用,以上是为了说明回调原理public class Caller {  ICallback callback;  public void doCallback() {    callback.func();  }  public void setCallback(ICallback callback) {    this.callback = callback;    doCallback();  }}

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