java桥接模式是什么

public class BridgeTest { 

    public static void main(String[] args) { 

        Bridge bridge = new MyBridge(); 

        /*调用第一个对象*/ 

        Sourceable source1 = new SourceSub1(); 

        bridge.setSource(source1); 

        bridge.method(); 

        /*调用第二个对象*/ 

        Sourceable source2 = new SourceSub2(); 

        bridge.setSource(source2); 

        bridge.method(); 

    } 

}