构造方法

package com.daixng_07;

public class Student {
    private String name;
    private int age;


    //有参构造方法
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }

    //无参构造方法
    public Student() {
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public int getAge() {
        return age;
    }

    public void show() {
        System.out.println(name + "," + age);
    }
}

package com.daixng_07;

public class StudentDemo {
    public static void main(String[] args) {

        Student s1 = new Student();
        s1.setName("大");
        s1.setAge(3);
        s1.show();

        System.out.println("☆.。.:*・°☆.。.:*・°☆.。.:*・°☆.。.:* ☆.。.:*・°☆.。.:*・°☆.。.:*・°☆.。.:*");

        Student s2 = new Student("大",3);
        s2.show();

    }
}

大,3
☆.。.:*・°☆.。.:*・°☆.。.:*・°☆.。.:* ☆.。.:*・°☆.。.:*・°☆.。.:*・°☆.。.:*
大,3

Process finished with exit code 0