在50个数里面取到七个数

package com.hnsw.app;

import java.util.Random;

public class studentMarkDemo01 {
    public static void main(String[] args) {
       int[] xingming = new int[50];
       int  a1 = 0;
        Random in =new Random();
        for (int i = 0; i < 1; i++){
            for (int j =0; j < 7 ; j++ ){
            int a = in.nextInt(50) + 1;
            switch (a) {
                case 1:
                    System.out.println("1");
                    a1++;
                    break;
                case 2:
                    System.out.println("2");
                    a1++;
                    break;
                case 3:
                    System.out.println("3");
                    a1++;
                    break;
                case 4:
                    System.out.println("4");
                    a1++;
                    break;
                case 5:
                    System.out.println("5");
                    a1++;
                    break;
                case 6:
                    System.out.println("6");
                    a1++;
                    break;
                case 7:
                    System.out.println("7");
                    a1++;
                    break;
                case 8:
                    System.out.println("8");
                    a1++;
                    break;
                case 9:
                    System.out.println("9");
                    a1++;
                    break;
                case 10:
                    System.out.println("10");
                    a1++;
                    break;
                case 11:
                    System.out.println("11");
                    a1++;
                    break;
                case 12:
                    System.out.println("12");
                    a1++;
                    break;
                case 13:
                    System.out.println("13");
                    a1++;
                    break;
                case 14:
                    System.out.println("14");
                    a1++;
                    break;
                case 15:
                    System.out.println("15");
                    a1++;
                    break;
                case 16:
                    System.out.println("16");
                    a1++;
                    break;
                case 17:
                    System.out.println("17");
                    a1++;
                    break;
                case 18:
                    System.out.println("18");
                    a1++;
                    break;
                case 19:
                    System.out.println("19");
                    a1++;
                    break;
                case 20:
                    System.out.println("20");
                    a1++;
                    break;
                case 21:
                    System.out.println("21");
                    a1++;
                    break;
                case 22:
                    System.out.println("22");
                    a1++;
                    break;
                case 23:
                    System.out.println("23");
                    a1++;
                    break;
                case 24:
                    System.out.println("2");
                    a1++;
                    break;
                case 26:
                    System.out.println("26");
                    a1++;
                    break;
                case 27:
                    System.out.println("27");
                    a1++;
                    break;
                case 28:
                    System.out.println("28");
                    a1++;
                    break;
                case 29:
                    System.out.println("29");
                    a1++;
                    break;
                case 30:
                    System.out.println("30");
                    a1++;
                    break;
                case 31:
                    System.out.println("31");
                    a1++;
                    break;
                case 32:
                    System.out.println("32");
                    a1++;
                    break;
                case 33:
                    System.out.println("33");
                    a1++;
                    break;
                case 34:
                    System.out.println("34");
                    a1++;
                    break;
                case 35:
                    System.out.println("35");
                    a1++;
                    break;
                case 36:
                    System.out.println("36");
                    a1++;
                    break;
                case 37:
                    System.out.println("37");
                    a1++;
                    break;
                case 38:
                    System.out.println("38");
                    a1++;
                    break;
                case 39:
                    System.out.println("39");
                    a1++;
                    break;
                case 40:
                    System.out.println("40");
                    a1++;
                    break;
                case 41:
                    System.out.println("41");
                    a1++;
                    break;
                case 42:
                    System.out.println("42");
                    a1++;
                    break;
                case 43:
                    System.out.println("43");
                    a1++;
                    break;
                case 44:
                    System.out.println("44");
                    a1++;
                    break;
                case 45:
                    System.out.println("45");
                    a1++;
                    break;
                case 46:
                    System.out.println("46");
                    a1++;
                    break;
                case 47:
                    System.out.println("47");
                    a1++;
                    break;
                case 48:
                    System.out.println("48");
                    a1++;
                    break;
                case 49:
                    System.out.println("49");
                    a1++;
                    break;
                case 50:
                    System.out.println("50");
                    a1++;
                    break;

            }
            }


        }
    }
}