Here you can find the source of toUnicode(String str)
public static String toUnicode(String str)
//package com.java2s; /**// w w w .j av a 2s . c o m * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF 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 toUnicode(String str) { String result = ""; char[] arr = str.toCharArray(); for (int i = 0; i < arr.length; i++) { result += toUnicode(arr[i]); } return result; } public static String toUnicode(char ch) { return String.format("\\u%04x", (int) ch); } }