第八周上机练习

1、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
方法。

package project1;


public class a1 {
    char color;
    int model;

    a1() {

    }

    a1(char color, int model) {
        this.color = color;
        this.model = model;
    }

    void a() {
        System.out.println("颜色：" + color + "  型号：" + model);
    }

    public static void main(String[] args) {
        a1 a = new a1('白', 9527);
        a.a();
    }

}

　　2

package project1;


public class a1 {
     public String name;
        double sg;
        int tz;
        int age;
        public a1() {
            
        }

        public a1(String name ,double sg,int tz,int age) {
            this.name=name;
            this.sg=sg;
            this.tz=tz;
            this.age=age;
        }
        public void sayHello() {
            System.out.println("hello my name is " + this.name);
        }
}

　　

package project1;

public class Constructor {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         a1 i1=new a1();
         i1.name="zhangsan";
         i1.sg=1.73;
         i1.tz=300;
         i1.age=33;
         
         a1 i2=new a1();
         i2.name="lishi";
         i2.sg=1.74;
         i2.tz=500;
         i2.age=44;
         
         i1.sayHello();
    }
}