001/* 002 * Configurate 003 * Copyright (C) zml and Configurate contributors 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.spongepowered.configurate.util; 018 019import static java.util.Objects.requireNonNull; 020 021/** 022 * Extra string utilities. 023 * 024 * @since 4.0.0 025 */ 026public final class Strings { 027 028 private Strings() {} 029 030 /** 031 * Create a new string with the contents of the provided string repeated 032 * {@code times} times. 033 * 034 * <p>Available in {@link String} itself as of JDK 11. 035 * 036 * @param content text to repeat 037 * @param times amount to repeat 038 * @return repeated string 039 * @since 4.0.0 040 */ 041 public static String repeat(final String content, final int times) { 042 requireNonNull(content, "content"); 043 044 switch (times) { 045 case 0: return ""; 046 case 1: return content; 047 default: 048 final StringBuilder ret = new StringBuilder(content.length() * times); 049 for (int i = 0; i < times; ++i) { 050 ret.append(content); 051 } 052 return ret.toString(); 053 } 054 } 055 056 /** 057 * Return if the input string is empty or has no non-whitespace characters. 058 * 059 * <p>This matches the behaviour of {@code String.isBlank()} 060 * in Java 11+.</p> 061 * 062 * @param test input string to test 063 * @return if the input string is blank 064 * @since 4.0.0 065 */ 066 public static boolean isBlank(final String test) { 067 for (int i = 0, len = test.length(); i < len; ++i) { 068 if (!Character.isWhitespace(test.charAt(i))) { 069 return false; 070 } 071 } 072 return true; 073 } 074 075}