Java 回调

package testcallback;

public interface Action {
public void performAction();

}

package testcallback;

public class ActionImpl implements Action {

@Override
public void performAction() {
// TODO Auto-generated method stub
System.out.println("perform action");

}

}

package testcallback;

public class UseAction {
public void useAction(Action action) {
action.performAction();
}

}

package testcallback;

public class TestCallback {

public static void main(String[] args) {
// TODO Auto-generated method stub
Action action = new ActionImpl();
UseAction useAction = new UseAction();
/**
* 指定useAction(Action action)中
* 执行ActionImpl的performAction()
* 方法
*/
useAction.useAction(action);

}

}