Here you can find the source of toCamelCase(String value)
public static String toCamelCase(String value)
//package com.java2s; /**/* w w w.j a v a 2 s. c o m*/ * Copyright (C) 2010 Lowereast Software * * Licensed 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 toCamelCase(String value) { String[] pieces = value.split("_"); if (pieces.length == 1) return toUpperFirstLetter(value); StringBuilder builder = new StringBuilder(); for (int x = 0; x < pieces.length; ++x) builder.append(toUpperFirstLetter(pieces[x])); return builder.toString(); } public static String toUpperFirstLetter(String value) { if (value.length() == 1) return value.toUpperCase(); return value.substring(0, 1).toUpperCase() + value.substring(1).toLowerCase(); } }