Javatext1

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import java.util.Scanner;class text3{    public static void main(String []args)    {        Scanner sc = new Scanner(System.in);        System.out.println("input name:");        String name = sc.next();        System.out.println("input age:");        int age = sc.nextInt();        Person p = new Person(name,age);        p.introduce();        Person p1 = new Person();               p1.introduce();    }}class Person{    private  String name;    private int age ;    public Person()    {    }    public  Person(String name , int age )    {        this.name = name ;        this.age = age ;     }    public void  introduce()    {        System.out.println("name:"+ this.name + " ,age: " + this.age);    }    public String getName()    {        return this.name;    }    public int getAge()    {        return this.age;    }    public void  setName(String name)    {        this.name = name;    }    public void setAge(int age)    {        if (age <0)             System.out.println("age error");        else            this.age = age;    }}

运行结果如下：
这里写图片描述

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