Java 回调

回调用于指定一个方法的具体行为。下面用实例来解释：

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);

	}

}

perform action

Java 回调

原文：http://blog.csdn.net/l294265421/article/details/46573035