Mini 学生管理器

 1 package Mini_xueshenguanliqi;
 2 
 3 public class Student {
 4     private int age;
 5     private String name;
 6 
 7     public Student() {
 8 
 9     }
10 
11     public Student(String name) {
12 
13     }
14 
15     public Student(int age) {
16     }
17 
18     public Student(String name, int age) {
19         this.name=name;
20         this.age=age;
21     }
22 
23 //返回年龄值
24     public int getAge() {
25         return age;
26     }
27 
28 //设置年龄
29     public void setAge(int age) {
30         if (age > 0) {
31             this.age = age;
32         } else {
33             System.out.println("年龄不合法");
34             this.age = 0;
35         }
36 
37     }
38 
39 //返回名字
40     public String getName() {
41         return name;
42     }
43 
44     public void setName(String name) {
45         this.name = name;
46     }
47 
48 //重写toString() 方法
49     public String toString() {
50         return name + "\t----\t" + age;
51     }
52 
53 }

  1 package Mini_xueshenguanliqi;
  2 
  3 import java.util.Scanner;
  4 
  5 public class Client {
  6     Student arr[] = new Student[5];
  7 
  8     public void initial() {
  9         Student stu1 = new Student("张三", 15);
 10         Student stu2 = new Student("李四", 14);
 11         Student stu3 = new Student("王五", 19);
 12         arr[0] = stu1;
 13         arr[1] = stu2;
 14         arr[2] = stu3;
 15         
 16         
 17         
 18 
 19     }
 20 
 21     public void start() {
 22         initial();
 23         
 24 //        调用初始化的信息；
 25         /**
 26          * 查看学生系信息
 27          */
 28         String a;
 29         do {
 30         System.out.println("欢迎进入学生管理器");
 31         System.out.println("1,查看学生信息");
 32         System.out.println("2,增加学生信息");
 33         System.out.println("3,修改学生信息");
 34         System.out.println("4,删除学生信息");
 35         System.out.println("请选择您的操作：");
 36         Scanner sc = new Scanner(System.in);
 37         int chose = sc.nextInt();
 38         
 39         
 40             switch (chose) {
 41             case 1:
 42                 showstu();
 43 //            调用函数；
 44                 break;
 45             case 2:
 46                 addstu();
 47 
 48                 break;
 49             case 3:
 50                 revisestu();
 51                 break;
 52             case 4:
 53                 deletestu();
 54                 break;
 55 
 56             default:
 57                 break;
 58             }
 59             System.out.println("是否继续，y/n");
 60              a=sc.next();
 61         } while (a.equals("y"));
 62 
 63     }
 64 
 65     /**
 66      * 输出学生信息
 67      */
 68     public void showstu() {
 69         System.out.println("现在的学生有:");
 70         System.out.println("姓名" + "\t" + "---" + "\t" + "年龄");
 71 
 72         for (int i = 0; i < arr.length; i++) {
 73             if (arr[i] != null) {
 74                 System.out.println(arr[i]);
 75             }
 76         }
 77     }
 78 
 79     /**
 80      * 增加学生信息
 81      */
 82     public void addstu() {
 83         Scanner sc = new Scanner(System.in);
 84         String a;
 85         do {
 86             for (int i = 0; i < arr.length; i++) {
 87             if (arr[i] == null) {
 88                 System.out.println("请输入新增学生姓名：");
 89                 String name = sc.next();
 90                 System.out.println("请输入新增学生年龄：");
 91                 int age = sc.nextInt();
 92                 arr[i] = new Student(name, age);
 93                 System.out.println("增加成功");
 94                 break;
 95             }
 96         }
 97             System.out.println("是否继续添加学生，y/n");
 98             a=sc.next();
 99         } while (a.equals("y"));
100         
101 
102     }
103 
104     /**
105      * 修改学生信息
106      */
107     public void revisestu() {
108         Scanner sc = new Scanner(System.in);
109         System.out.println("请输入您要修改的学生姓名：");
110         String name = sc.next();
111         for (int i = 0; i < arr.length; i++) {
112             if (arr[i].getName().equals(name)) {
113                 System.out.println("请输入修改后的姓名");
114                 String name1 = sc.next();
115                 System.out.println("请输入修改后的年龄");
116                 int age = sc.nextInt();
117                 arr[i] = new Student(name1, age);
118                 System.out.println("修改成功");
119                 break;
120 //                System.out.println("你要修改1,姓名2,年龄");
121 //                int chose=sc.nextInt();
122 //                switch (chose) {
123 //                case 1:
124 //                    System.out.println("请输入修改后的姓名");
125 //                    String name1=sc.next();
126 //                    
127 //                    break;
128 //                case 2:
129 //                    System.out.println("请输入修改后的年龄");
130 //                    int age=sc.nextInt();
131 //                default:
132 //                    break;
133 //                }
134             }
135         }
136     }
137 
138     public void deletestu() {
139         Scanner sc = new Scanner(System.in);
140         System.out.println("请输入您要删除的学生姓名：");
141         String name = sc.next();
142         for (int i = 0; i < arr.length; i++) {
143             if (arr[i].getName().equals(name)) {
144 
145                 arr[i] = null;
146                 break;
147             }
148         }
149     }
150 
151 }

package Mini_xueshenguanliqi;


public class Text01 {
    public static void main(String[] args) {
        Client c=new Client();
        Student arr[] = new Student[5];
        c.start();
    }
}