设计模式适配器模式

------------------------对象适配器模式(组合模式)---------------------------------

public class AdapterTest {
    public static void main(String[] args) {
        Target target = new Adapter(new Adaptee());
        target.output5v();
    }
}

class Adaptee {
    public int output220v() {
        return 220;
    }
}

interface Target {
    int output5v();
}

class Adapter implements Target {
    private Adaptee adaptee;
    public Adapter(Adaptee adaptee) {
        this.adaptee = adaptee;
    }
    @Override
    public int output5v() {
        System.out.println("原始电压"+ adaptee.output220v() + ", 转换后电压: " + 5);
        return 5;
    }
}

--------------------------------类适配器模式(继承)-----------------------------------

public class AdapterTest {
    public static void main(String[] args) {
        Target target = new Adapter();
        target.output5v();
    }
}

class Adaptee {
    public int output220v() {
        return 220;
    }
}

interface Target {
    int output5v();
}

class Adapter extends Adaptee implements Target {
    @Override
    public int output5v() {
        System.out.println("原始电压"+ output220v() + ", 转换后电压: " + 5);
        return 5;
    }
}