Here you can find the source of toCSV(int[] a)
public static String toCSV(int[] a)
//package com.java2s; /*// w w w.j a v a2 s . co m * #%L * G * %% * Copyright (C) 2014 Giovanni Stilo * %% * G is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <https://www.gnu.org/licenses/lgpl-3.0.txt>. * #L% */ public class Main { public static String toCSV(int[] a) { String ret = ""; for (int i = 0; i < a.length; i++) { if (i != 0) { ret += ',' + a[i]; } else { ret += a[i]; } } return ret; } }