Here you can find the source of rightPadOrTruncate(String str, int resultSz)
public static String rightPadOrTruncate(String str, int resultSz)
//package com.java2s; /*/*ww w. j av a 2 s .com*/ * Robonobo Common Utils * Copyright (C) 2008 Will Morton (macavity@well.com) & Ray Hilton (ray@wirestorm.net) * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * 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 General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ public class Main { public static String rightPadOrTruncate(String str, int resultSz) { if (resultSz < 5) throw new IllegalArgumentException("Can't truncate to <5 chars, won't fit ellipsis in"); if (str == null) str = ""; if (resultSz >= str.length()) return rightPad(str, resultSz); String el = "[...]"; int availSz = resultSz - el.length(); return el + str.substring(str.length() - availSz); } public static String rightPad(String str, int size) { if (str.length() >= size) return str; StringBuffer sb = new StringBuffer(); sb.append(str); for (int i = 0; i < size - str.length(); i++) { sb.append(' '); } return sb.toString(); } }