如何为用户在JAVA程序中创建的每个学生提供唯一的ID

import java.util.UUID;

public class Student {
    private String id;
    private String name;

    public Student(String name) {
        this.id = UUID.randomUUID().toString();
        this.name = name;
    }

    // 其他属性和方法
}

public class Student {
    private static int nextId = 1;
    private int id;
    private String name;

    public Student(String name) {
        this.id = nextId++;
        this.name = name;
    }

    // 其他属性和方法
}

import java.util.Random;

public class Student {
    private long id;
    private String name;

    public Student(String name) {
        this.id = System.currentTimeMillis() + new Random().nextInt(1000);
        this.name = name;
    }

    // 其他属性和方法
}