Java 类的定义与调用

Java 类的定义与调用

package cn.itbaizhan;

public class SxtStu {
    int id;
    String name;
    int age;

    void learn(){
        System.out.println(id+"号"+name+"在学习年龄"+age);
    }
    //构造方法
    SxtStu(){

    }

    public static void main(String[] args) {
        SxtStu s1 = new SxtStu();
        s1.id = 001;
        s1.name = "李四";
        s1.age = 18;
        s1.learn();
        SxtStu s2 = new SxtStu();
        s2.learn();
    }

}