searchfornumbers.java

来自「Java the UML Way 书中所有源码」· Java 代码 · 共 30 行

/*
 * SearchForNumbers.java   E.L. 2001-08-12
 *
 */
class SearchForNumbers {
  public static void main(String[] args) {
    final int limit1 = 0;
    final int limit2 = 70;
    final int limit3 = 80;
    final int limit4 = 100;

    int noOfOK = 0;
    int number = (int) ((limit4 - limit1) * Math.random() + 1);

    while (number < limit2 || number > limit3) {
      noOfOK++;
      System.out.println(number);
      number = (int) ((limit4 - limit1) * Math.random() + 1);
    }
    System.out.println("We had to draw " + noOfOK + 
                       " numbers until we got an illegal one: " + number);
   }
 }

/* Example Run:
97
12
45
We had to draw 3 numbers until we got an illegal one: 74
*/