Java tutorial
//package com.java2s; import java.util.*; public class Main { public static String stringify(Object[] array) { if (isEmpty(array)) { return ""; } else { StringBuilder sb = new StringBuilder("{ "); for (Object obj : array) sb.append(obj).append(", "); return sb.deleteCharAt(sb.length() - 2).append("}").toString(); } } public static boolean isEmpty(Collection<?> collection) { return collection == null || collection.isEmpty(); } public static boolean isEmpty(Object[] array) { return array == null || array.length == 0; } }