类（初学）

1属性

2行为

3类是抽象，对象是具体

4一个标准类有四个内容：private 修饰；getter，setter方法；无参构造；全参构造。

package day01;

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

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

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

    public void setAge(int age) {
        this.age = age;
    }
    public void hi(String name,int age){
        System.out.println("我叫"+name+"今年"+age);
    }
}

package day01;
//import day01.Student
public class Case03 {
    public static void main(String[] args) {
        Student stu1=new Student();
        stu1.setName("Lucken");
        stu1.setAge(18);
        stu1.hi("Lucken",18);
    }
}