Java 绘制并保存三个随机值​从其他表复制到数组

我试着画随机值​​并将它们保存到另一个表中。我不确定我在这里做错了什么，也不确定我的想法是否正确

String[] name = {"Audi 100", "Audi 200", "Audi 4000", 
                 "Audi 50", "Audi e-tron",
                 "Audi A2", "Audi A3", "Audi A4", 
                 "Audi A5", "Audi A6", "Audi F103",
                 "Audi 5000", "Audi 80", "Audi 90", 
                 "Audi A1", "Audi A7", "Audi A8",
                 "Audi Allroad", "Audi Cabriolet", 
                 "Audi Coupe", "Audi Coupe S"};

    int[] engine = {10*20};
    int[] numberOfSeats = {1,2,3,4,5};
    Random r = new Random();
    MotorVehicle[] model = new MotorVehicle[100];
    for(int i = 0; i < model.length; i++) model[i] = new
    MotorVehicle((int)(Math.random()*5)+1,name[r.nextInt(name.length)],new 
    Silnik((int)((Math.random()* 250)+50),(long) 
    ((Math.random()*6000l)+50l)));

---

因为我们不知道MotorVehicle和Silnik类做什么，所以我假设需要一些数据成员来测试您的程序。 另一件事是-我们不了解engine[]和numberOfSeats[]数组的用途

丢弃这些东西，程序看起来很好，不会抛出任何绑定异常

class MotorVehicle{
  int motor_a;
  String motor_b;
  Silnik motor_c;
  public MotorVehicle(int i, String string, Silnik silnik) {
    // TODO Auto-generated constructor stub
    motor_a = i;
    motor_b = string;
    motor_c = silnik;
  }

}
class Silnik{
  int silinik_a;
  long silinik_b;
  public Silnik(int i, long l) {
    // TODO Auto-generated constructor stub
    silinik_a = i;
    silinik_b = l;
  }
}

public class Test extends Driver {
  public static void main(String[] args) {
    String[] name = { "Audi 100", "Audi 200", "Audi 4000", "Audi 50", "Audi e-tron", "Audi A2", "Audi A3", "Audi A4",
        "Audi A5", "Audi A6", "Audi F103", "Audi 5000", "Audi 80", "Audi 90", "Audi A1", "Audi A7", "Audi A8",
        "Audi Allroad", "Audi Cabriolet", "Audi Coupe", "Audi Coupe S" };

    int[] engine = { 10 * 20 };
    int[] numberOfSeats = { 1, 2, 3, 4, 5 };
    Random r = new Random();
    MotorVehicle[] model = new MotorVehicle[100];


    for (int i = 0; i < model.length; i++) {
      int rand5 = (int)(Math.random()*5) + 1;
      int randN = r.nextInt(name.length);
      String randName = name[randN];
      int rand250 = (int)(Math.random()*250)+50;
      long rand6000 = (long)(Math.random()*6000l)+501;
      model[i] = new MotorVehicle(rand5, randName,new Silnik(rand250, rand6000));
    }

    for(int i = 0;i<model.length;i++) {
      System.out.println(model[i].motor_a + " #  "+model[i].motor_b + " # "+model[i].motor_c.silinik_a + " # "+ model[i].motor_c.silinik_b );
    }
  }

---

那么，你期望得到什么以及它是如何结束的呢？如果你不花时间分享至少机动车类构造函数是由什么组成的以及使用了哪些类成员变量，你希望有人如何帮助你。还有，西尔尼克级到底是什么？@DevilsHnd在波兰语中似乎是一个引擎

1 #  Audi 200 # 123 # 3160
3 #  Audi A4 # 276 # 2625
2 #  Audi e-tron # 267 # 6153
1 #  Audi 100 # 100 # 741
3 #  Audi 4000 # 146 # 6335
3 #  Audi 200 # 174 # 1155
5 #  Audi Allroad # 164 # 5588
4 #  Audi 90 # 250 # 2021
2 #  Audi e-tron # 285 # 4536
5 #  Audi F103 # 92 # 5828
4 #  Audi A7 # 238 # 1049
3 #  Audi A6 # 271 # 2187
1 #  Audi Coupe # 105 # 1422
2 #  Audi A3 # 274 # 4337
3 #  Audi A4 # 211 # 2850
4 #  Audi A4 # 229 # 1048
3 #  Audi 4000 # 238 # 4981
3 #  Audi A8 # 208 # 2051
5 #  Audi 100 # 89 # 5998
4 #  Audi 200 # 77 # 5026
3 #  Audi A7 # 230 # 967
1 #  Audi A4 # 78 # 3321
5 #  Audi 4000 # 243 # 1612
1 #  Audi A7 # 85 # 5704
1 #  Audi A7 # 269 # 1914
5 #  Audi Coupe S # 136 # 6371
4 #  Audi A2 # 224 # 1079
1 #  Audi 4000 # 198 # 2126
5 #  Audi e-tron # 212 # 5673
2 #  Audi 50 # 134 # 3746
1 #  Audi A2 # 150 # 5832
1 #  Audi A5 # 247 # 2257
4 #  Audi Allroad # 180 # 6049
4 #  Audi e-tron # 222 # 3857
3 #  Audi F103 # 170 # 2547
1 #  Audi F103 # 165 # 2669
3 #  Audi 4000 # 266 # 4824
2 #  Audi 200 # 286 # 2328
5 #  Audi 50 # 145 # 5524
4 #  Audi 80 # 243 # 3674
2 #  Audi 90 # 250 # 5193
5 #  Audi A3 # 96 # 524
3 #  Audi A4 # 159 # 1081
2 #  Audi Allroad # 90 # 1882
3 #  Audi F103 # 62 # 5466
3 #  Audi Cabriolet # 148 # 4968
5 #  Audi 5000 # 161 # 2834
2 #  Audi Cabriolet # 242 # 3434
1 #  Audi e-tron # 138 # 4758
3 #  Audi 50 # 171 # 3119
3 #  Audi 90 # 287 # 5967
1 #  Audi 50 # 203 # 5071
5 #  Audi A7 # 171 # 3352
4 #  Audi 80 # 143 # 6441
2 #  Audi Allroad # 166 # 4768
1 #  Audi 5000 # 132 # 4580
3 #  Audi Cabriolet # 260 # 1412
2 #  Audi Coupe S # 253 # 2618
5 #  Audi A4 # 60 # 1015
3 #  Audi 80 # 149 # 1188
1 #  Audi 200 # 78 # 4793
5 #  Audi 200 # 213 # 1298
1 #  Audi e-tron # 213 # 5143
4 #  Audi A2 # 104 # 2000
2 #  Audi 50 # 227 # 5827
3 #  Audi Cabriolet # 139 # 1833
5 #  Audi 80 # 169 # 3545
4 #  Audi Coupe S # 63 # 4705
1 #  Audi A3 # 144 # 6161
3 #  Audi Coupe S # 103 # 1136
2 #  Audi A4 # 103 # 3810
5 #  Audi 200 # 59 # 1457
3 #  Audi 50 # 238 # 3969
3 #  Audi F103 # 148 # 2981
3 #  Audi Allroad # 160 # 5260
4 #  Audi A2 # 264 # 4053
2 #  Audi Coupe S # 179 # 1198
2 #  Audi 5000 # 199 # 4832
1 #  Audi Cabriolet # 126 # 4746
1 #  Audi 50 # 177 # 4372
5 #  Audi A8 # 152 # 5861
5 #  Audi A8 # 77 # 4636
5 #  Audi 90 # 242 # 1312
4 #  Audi Coupe S # 199 # 4370
3 #  Audi 80 # 140 # 3855
4 #  Audi A5 # 189 # 1913
2 #  Audi A8 # 125 # 2068
4 #  Audi 80 # 104 # 2864
3 #  Audi 200 # 263 # 2287
1 #  Audi Allroad # 160 # 4913
3 #  Audi A1 # 254 # 3408
5 #  Audi A6 # 99 # 5840
5 #  Audi 100 # 252 # 3840
3 #  Audi 90 # 165 # 665
1 #  Audi A5 # 214 # 544
5 #  Audi Coupe # 212 # 1058
5 #  Audi 50 # 112 # 5366
3 #  Audi Allroad # 158 # 3290
5 #  Audi 80 # 166 # 6249
4 #  Audi A4 # 121 # 6349