Here you can find the source of rtrim(String s)
public static String rtrim(String s)
//package com.java2s; /*/*from ww w. j a v a 2 s .co m*/ * StringUtil.java * * This file is part of SQL Workbench/J, http://www.sql-workbench.net * * Copyright 2002-2017, Thomas Kellerer * * Licensed under a modified Apache License, Version 2.0 * that restricts the use for certain governments. * You may not use this file except in compliance with the License. * You may obtain a copy of the License at. * * http://sql-workbench.net/manual/license.html * * 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. * * To contact the author please send an email to: support@sql-workbench.net * */ public class Main { public static String rtrim(String s) { if (s == null) return s; int pos = s.length(); if (pos == 0) return s; char last = s.charAt(pos - 1); if (last > ' ') return s; while (pos > 0 && s.charAt(pos - 1) <= ' ') { pos--; } return s.substring(0, pos); } public static CharSequence rtrim(CharSequence s) { if (s == null) return s; int pos = s.length(); if (pos == 0) return s; char last = s.charAt(pos - 1); if (last > ' ') return s; while (pos > 0 && s.charAt(pos - 1) <= ' ') { pos--; } return s.subSequence(0, pos); } }