Here you can find the source of createWriter(@Nullable final OutputStream aOS, @Nonnull final Charset aCharset)
@Nullable public static OutputStreamWriter createWriter(@Nullable final OutputStream aOS, @Nonnull final Charset aCharset)
//package com.java2s; /**/*from w w w.j ava2 s . c om*/ * Copyright (C) 2014-2017 Philip Helger (www.helger.com) * philip[at]helger[dot]com * * 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.OutputStream; import java.io.OutputStreamWriter; import java.nio.charset.Charset; import javax.annotation.Nonnull; import javax.annotation.Nullable; public class Main { @Nullable public static OutputStreamWriter createWriter(@Nullable final OutputStream aOS, @Nonnull final Charset aCharset) { return aOS == null ? null : new OutputStreamWriter(aOS, aCharset); } }