arraynew.java

180个针对Java初学者的简单实例180个针对Java初学者的简单实例180个针对Java初学者的简单实例

// 有new创建数组.
import java.util.*;
public class ArrayNew {
  static Random rand = new Random();
  static int pRand(int mod) {
    return Math.abs(rand.nextInt()) % mod + 1;
  }
  public static void main(String[] args) {
    int[] a;
    a = new int[pRand(20)];
    prt("length of a = " + a.length);
    for(int i = 0; i < a.length; i++)
      prt("a[" + i + "] = " + a[i]);
  }
  static void prt(String s) {
    System.out.println(s);
  }
}