reversearray.java

来自「Java 入门书的源码」· Java 代码 · 共 30 行

//Copyright (c) 1998, Arthur Gittleman
//This example is provided WITHOUT ANY WARRANTY either expressed or implied.

/*  Reverses an array.  Tested with
 *  arrays initialized in the program.
 */
         
public class ReverseArray {
  public static void main(String [] args)  {
    int [] score = {56, 91, 22, 87, 49, 89, 65};
    int temp;                     // used to store a value during a swap
    int left = 0;                 // index of the left element to swap
    int right = score.length -1;  // index of the right element to swap

    while (left < right) {
      temp           = score[left];
      score[left]    = score[right];
      score[right]   = temp;
      right--;
      left++;
    }
    System.out.print("{");
    for (int i=0; i<score.length; i++) {
      if (i!=0) System.out.print(",");
      System.out.print(score[i]);
    }
    System.out.println("}");
  }
}