封装
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/*编写一个学生类Students,该类成员变量包括学号no、姓名name、性别sex和年龄age,该类的成员方法有genNo()getName ).
* getSex().getAge().和setAge() 添加构造方法为所有成员变量赋初值,构造方法要有4种格式:
(1) 包括no,name,sex 和age四个参数。
(2) 包括 no.name 和sex 三个参数。
(3) 包括mo和name两个参数。
(4) 只包括no一个参数。
*/
class Message {// 创建Student这个类
private int no;// 成员变量
private static int age;
private String name;
private String sex;
public void setAge(int myAge) {//封装
if (myAge <= 0) {
System.out.println("年龄出错,使用默认年龄18岁代替");
age=18;
}
else
age=myAge;
}
public int getNo() {
System.out.println("学号:"+no);
return no;
}
public String getName(){
System.out.println("姓名:"+name);
return name;}
public String getSex(){
System.out.println("性别:"+sex);
return sex;}
public int getAge() {
System.out.println("年龄:"+age);
return age;
}
publicMessage(int myNo, String myName, String mySex, int myAge) {//构造方法变量初始化
no = myNo;
name = myName;
sex = mySex;
age = myAge;
}
public Student(int myNo, String myName, String mySex) {
no = myNo;
name = myName;
sex = mySex;
}
public Student(int myNo, String myName) {
no = myNo;
name = myName;
}
public Student(int myNo) {
no = myNo;
}
public static void main(String[] args) { // 声明对象和创建对象
Student Student1= new Student(1625,"张三","m",20);
Student Student2= new Student(1624,"李四","f");
Student Student3= new Student(1623,"张三");
Student Student4= new Student(1622);
Student1.setAge(age);
Student1.getNo();
Student1.getName();
Student1.getSex();
Student1.getAge();
Student2.getNo();
Student2.getName();
Student2.getSex();
Student3.getNo();
Student3.getName();
Student4.getNo();
}
}
class Message {// 创建Student这个类
private int no;// 成员变量
private static int age;
private String name;
private String sex;
public void setAge(int myAge) {//封装
if (myAge <= 0) {
System.out.println("年龄出错,使用默认年龄18岁代替");
age=18;
}
else
age=myAge;
}
public int getNo() {
System.out.println("学号:"+no);
return no;
}
public String getName(){
System.out.println("姓名:"+name);
return name;}
public String getSex(){
System.out.println("性别:"+sex);
return sex;}
public int getAge() {
System.out.println("年龄:"+age);
return age;
}
publicMessage(int myNo, String myName, String mySex, int myAge) {//构造方法变量初始化
no = myNo;
name = myName;
sex = mySex;
age = myAge;
}
public Student(int myNo, String myName, String mySex) {
no = myNo;
name = myName;
sex = mySex;
}
public Student(int myNo, String myName) {
no = myNo;
name = myName;
}
public Student(int myNo) {
no = myNo;
}
public static void main(String[] args) { // 声明对象和创建对象
Student Student1= new Student(1625,"张三","m",20);
Student Student2= new Student(1624,"李四","f");
Student Student3= new Student(1623,"张三");
Student Student4= new Student(1622);
Student1.setAge(age);
Student1.getNo();
Student1.getName();
Student1.getSex();
Student1.getAge();
Student2.getNo();
Student2.getName();
Student2.getSex();
Student3.getNo();
Student3.getName();
Student4.getNo();
}
}
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