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  1. class EqualityUtils {
  2.  
  3.     private EqualityUtils() {}
  4.  
  5.     public static boolean pairsEqual(Object... objects) {
  6.         if (objects.length < 2) {
  7.             throw new IllegalArgumentException("At least two arguments must be provided.");
  8.         }
  9.         if (objects.length % 2 == 1) {
  10.             throw new IllegalArgumentException("Even number of arguments is required.");
  11.         }
  12.         int i = 0;
  13.         while (i < objects.length) {
  14.             if (!objectsEqual(objects[i], objects[i + 1])) {
  15.                 return false;
  16.             }
  17.             i += 2;
  18.         }
  19.         return true;
  20.     }
  21.  
  22.     public static boolean objectsEqual(Object a, Object b) {
  23.         return a == b || (a != null && a.equals(b));
  24.     }
  25.  
  26.     public static Object println(String message) {
  27.         System.out.println(message);
  28.         return message;
  29.     }
  30.  
  31.     public static void main(String... args) {
  32.         System.out.println(pairsEqual(1, 2, println("Hello"), println("Hello")));
  33.         System.out.println(pairsEqual(1, 1, println("Hello"), println("Hello")));
  34.     }
  35.  
  36. }
  37.  
Success #stdin #stdout 0.08s 212416KB
comments (?)
stdin
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Standard input is empty
stdout
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Hello
Hello
false
Hello
Hello
true
https://ideone.com/ETwvi
language:
Java (HotSpot 12)
created:
14 years ago
visibility:
public

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