适配器模式（Adapter) - Jfson的博客

适配器模式允许您在适配器中包装其他不兼容的对象，以使其与另一个类兼容。

示例：语言学习，绝大多数人学习英语，日语系的同学要学日语

class Student {
   void studyEnglish();
}
class NormalStudent extend Student{
    public void studyEnglish(){
        // study
    }
    public void studyJapanese(){
        // no 
    }
}
class JapaneseStudent extend Student{
    public void studyEnglish(){
        // no
    }
    public void studyJapanese(){
        // study 
    }
}
class StudentAdapter {
    public void study(NormalStudent student){
        if(student instanceof NormalStudent){
            student.studyEnglish();
        }
        if(student instanceof JapaneseStudent){
            student.studyJapanese();
        }
    }
}
class User{
    StudentAdapter adapter = new StudentAdapter();
    adapter.study(new NormalStudent());
    adapter.study(new JapaneseStudent());
    //...
}

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