JAVA生成随机数

public class Vip {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入会员姓名：");
        String name=scanner.next();
        System.out.println("请输入会员性别：");
        String sex=scanner.next();
        System.out.println("请输入会员年龄：");
        int age=scanner.nextInt();
        System.out.println("创建会员成功!");
        //生成4位10以内的数字
        System.out.println("会员编号为" + (int)(Math.random()*9000+1000));
        System.out.println("会员详细信息：");
        System.out.println(name+"\t"+sex+"\t"+age);

    }
}