UML类图

UML类图理解

依赖关系

public class Person {  
    public void doSomething(){  
        Card card = new Card();//局部变量  
        ....  
    }  
}

public class Person {  
    public void doSomething(Card card){//方法参数  
        ....  
    }  
}

public class Person {  
    public void doSomething(){  
        int id = Card.getId();//静态方法调用  
        ...  
    }  
}

关联关系

public class Person {  
    public Phone phone;  
      
    public void setPhone(Phone phone){        
        this.phone = phone;  
    }  
      
    public Phone getPhone(){          
        return phone;  
    }  
}

聚合关系

public class Team {  
    public Person person;  
      
    public Team(Person person){  
        this.person = person;  
    }  
}

组合关系

public class Person {  
    public Head head;  
    public Body body;  
    public Arm arm;  
    public Leg leg;  
      
    public Person(){  
        head = new Head();  
        body = new Body();  
        arm = new Arm();  
        leg = new Leg();  
    }  
}

继承关系