1.所有的成员变量都要使用private关键字修饰
2.为每一个成员变量编写一对儿getter/ setter方法
3.编写一个无参数的构造方法,
4.编写一个全参数的构造方法
标准的类也叫做Java Bean
定义一个类
public class Student {
//成员变量
private String name;
private int age;
//无参数的构造方法,快捷方式:Code-Generate-Construstor-Selectnone
public Student() {
}
//全参数的构造方法,快捷方式:Code-Generate-Construstor-全选
public Student(String name, int age) {
this.name = name;
this.age = age;
}
//快捷方式:Code-Generate-Getter and Setter
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
实例
public class Demo01Student {
public static void main(String[] args) {
Student stu1 = new Student();
stu1.setName("秋水浮萍");
stu1.setAge(20);
System.out.println("姓名:" + stu1.getName() + ",年龄为" + stu1.getAge());
System.out.println("===============");
Student stu2= new Student("古力娜扎",20);
System.out.println("姓名:" + stu2.getName() + ",年龄为" + stu2.getAge());
stu2.setAge(30);
System.out.println("姓名:" + stu2.getName() + ",年龄为" + stu2.getAge());
}
}