5、定义两个类,描述如下: [必做题]
• 5.1定义一个人类Person:
• 5.1.1定义一个方法sayHello(),可以向对方发出问
候语“hello,my name is XXX”
• 5.1.2有三个属性:名字、身高、体重
• 5.2定义一个PersonCreate类:
• 5.2.1创建两个对象,分别是zhangsan,33岁,1.73
;lishi,44,1.74
• 5.2.2分别调用对象的sayHello()方法。

public class Person {
    String name;
    double height;
    int age;
    Person(String name,double height, int age) {
        this.name = name;
        this.height = height;
        this.age = age;
    }
    void sayHello() {
        System.out.println("hello,my name is  "+name +"  "+height+" m "+" "+age+ "岁");
    }
}
public class PersonCreate {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Person a = new Person("zhangsan", 1.73,33);
        Person b = new Person("lishi",1.74,44);
        a.sayHello();
        b.sayHello();

    }

}

3、定义一个笔记本类,该类有颜色(char)和cpu
型号(int)两个属性。 [必做题]
• 3.1 无参和有参的两个构造方法;有参构造方法可
以在创建对象的同时为每个属性赋值;
• 3.2 输出笔记本信息的方法
• 3.3 然后编写一个测试类,测试笔记本类的各个

public class Computer {
    
     private char color;
     private int cpu;
     public Computer(){
         
     }
     public Computer(char color,int cpu){
         this.color=color;
         this.cpu=cpu;
     }
     public char getColor(){
         return color;
     }
     public void setColor(char color){
         this.color=color;
     }
     public int getCpu(){
         return cpu;
     }
     public void setCpu(int cpu){
         this.cpu=cpu;
     }
     public void showComputer(){
         System.out.println("笔记本的颜色是: "+getColor());
         System.out.println("cpu型号:"+getCpu());
         
     }
 }
public class TestComputer {

    public static void main(String[] args) {
         Computer a = new Computer();
         a.showComputer();
         Computer b = new Computer('黑',66668888);
         b.showComputer();

    }

 

 


 

posted on 2020-04-23 12:16  .+  阅读(218)  评论(0编辑  收藏  举报