Here you can find the source of truncate(String str, int chars)
public static String truncate(String str, int chars)
//package com.java2s; /*//from w ww. jav a 2 s. co m * This file is licensed to the Toobs Framework Group under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The Toobs Framework Group licenses this file to You under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of the * License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { public static String truncate(String str, int chars) { if (str == null) return str; if (str.length() > chars) { return str.substring(0, chars - 3) + "..."; } return str; } }