适配器模式

在类Source里有一个已存在的方法sourceMethod(),现在有一个接口Target想通过一个适配器Adapter类来调用sourceMethod方法：

1.Source类

public class Source {
    public void sourceMethod(){
        System.out.println("Source Method...");
    }
}

2.target接口

public interface Target {
    public void sourceMethod();
    public void otherMethod();
}

3.Adapter适配器类

public class Adapter implements Target{
    
    private Source source;
    
    public Adapter(Source source){
        this.source = source;
    }

    @Override
    public void sourceMethod() {
        // TODO Auto-generated method stub
        source.sourceMethod();
    }

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

4.测试类

public class Test {
    public static void main(String[] args) {
        Target target = new Adapter(new Source());
        target.sourceMethod();
        target.otherMethod();
    }
}