1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.commons.io.output; 19 20 import java.io.PrintStream; 21 22 /** 23 * Never prints data. Calls never go beyond this class. 24 * <p> 25 * This print stream has no destination (file/socket etc.) and all bytes written to it are ignored and lost. 26 * </p> 27 * 28 * @since 2.7 29 */ 30 public class NullPrintStream extends PrintStream { 31 32 /** 33 * The singleton instance. 34 * 35 * @since 2.12.0 36 */ 37 public static final NullPrintStream INSTANCE = new NullPrintStream(); 38 39 /** 40 * The singleton instance. 41 * 42 * @deprecated Use {@link #INSTANCE}. 43 */ 44 @Deprecated 45 public static final NullPrintStream NULL_PRINT_STREAM = INSTANCE; 46 47 /** 48 * Constructs an instance. 49 */ NullPrintStream()50 public NullPrintStream() { 51 // Relies on the default charset which is OK since we are not actually writing. 52 super(NullOutputStream.INSTANCE); 53 } 54 55 } 56