生成一个Java简单增删改查代码
时间: 2024-05-05 22:15:53 浏览: 16
这是一个简单的Java增删改查代码示例:
```
import java.util.ArrayList;
public class Student {
private int id;
private String name;
private int age;
public Student(int id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
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;
}
}
public class StudentManager {
private ArrayList<Student> studentList;
public StudentManager() {
studentList = new ArrayList<>();
}
public void addStudent(Student student) {
studentList.add(student);
}
public void removeStudent(int id) {
for (Student student : studentList) {
if (student.getId() == id) {
studentList.remove(student);
break;
}
}
}
public void updateStudent(int id, String name, int age) {
for (Student student : studentList) {
if (student.getId() == id) {
student.setName(name);
student.setAge(age);
break;
}
}
}
public Student getStudent(int id) {
for (Student student : studentList) {
if (student.getId() == id) {
return student;
}
}
return null;
}
}
public class Main {
public static void main(String[] args) {
StudentManager manager = new StudentManager();
//添加学生
manager.addStudent(new Student(1, "张三", 20));
manager.addStudent(new Student(2, "李四", 21));
manager.addStudent(new Student(3, "王五", 22));
//获取学生信息
System.out.println(manager.getStudent(1).getName());
System.out.println(manager.getStudent(2).getAge());
//更新学生信息
manager.updateStudent(1, "赵六", 23);
System.out.println(manager.getStudent(1).getName());
//删除学生
manager.removeStudent(2);
System.out.println(manager.getStudent(2));
}
}
```
这个示例代码实现了一个简单的学生信息管理系统,可以添加学生,删除学生,更新学生信息和获取学生信息。
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