// Helene Martin, CSE 142
// Demonstates reference semantics -- the reverse method
// doesn't need to return anything.
import java.util.*;

public class Reverse {
   public static void main(String[] args) {
      int[] values = {54, 23, 12, -11, 45, 555};
      System.out.println(Arrays.toString(values));
      
      // Because of reference semantics, the array
      // is reversed by this method.
      reverse(values);
        
      System.out.println(Arrays.toString(values));         
   }
   
   // reverse the contents of the array
   // first swap value at 0 with value at length - 1 
   //       then value at 1 with value at length - 2
   
   // Reverses the content of the specified array
   public static void reverse(int[] values) {
      for (int i = 0; i < values.length / 2; i++) {
         int temp = values[i];
         values[i] = values[values.length - 1 - i];
         values[values.length - 1 - i] = temp;
      } 
   }  
}