Here you can find the source of toBufferedDataOutputStream(final OutputStream outputStream)
public static final DataOutputStream toBufferedDataOutputStream(final OutputStream outputStream) throws IOException
//package com.java2s; /*/* w w w . ja va 2 s . co m*/ * Copyright 2004-2006 the Seasar Foundation and the Others. * * 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. */ import java.io.BufferedOutputStream; import java.io.DataOutputStream; import java.io.IOException; import java.io.OutputStream; public class Main { public static final DataOutputStream toBufferedDataOutputStream(final OutputStream outputStream) throws IOException { return new DataOutputStream(toBufferedOutputStream(outputStream)); } public static final OutputStream toBufferedOutputStream(OutputStream outputStream) throws IOException { if (!(outputStream instanceof BufferedOutputStream)) { outputStream = new BufferedOutputStream(outputStream); } return outputStream; } }