缺省适配器

interface abstractService{
    void service1();
    int service2();
    String service3();
}

class ServiceAdapter implements abstractService{

    @Override
    public void service1() {
        // TODO Auto-generated method stub
        
    }

    @Override
    public int service2() {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public String service3() {
        // TODO Auto-generated method stub
        return null;
    }
    
}