Java tutorial
/* * Copyright 2012-2019 the original author or authors. * * 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 * * https://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. */ package org.springframework.boot.cli.util; /** * Simple logger used by the CLI. * * @author Phillip Webb * @since 1.0.0 */ public abstract class Log { private static LogListener listener; public static void info(String message) { System.out.println(message); if (listener != null) { listener.info(message); } } public static void infoPrint(String message) { System.out.print(message); if (listener != null) { listener.infoPrint(message); } } public static void error(String message) { System.err.println(message); if (listener != null) { listener.error(message); } } public static void error(Exception ex) { ex.printStackTrace(System.err); if (listener != null) { listener.error(ex); } } static void setListener(LogListener listener) { Log.listener = listener; } }