Here you can find the source of writeString(String str, DataOutputStream os)
public static void writeString(String str, DataOutputStream os) throws IOException
//package com.java2s; /*/*from ww w. j a va2 s . c o m*/ * Licensed to the University of California, Berkeley 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. */ import java.io.DataOutputStream; import java.io.IOException; public class Main { public static void writeString(String str, DataOutputStream os) throws IOException { if (str == null) { os.writeInt(-1); } else { os.writeInt(str.length()); os.writeChars(str); } } }