Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project 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. */ package io.netty.util; /** * An {@link IllegalStateException} which is raised when a user attempts to access a {@link ReferenceCounted} whose * reference count has been decreased to 0 (and consequently freed). */ public class IllegalReferenceCountException extends IllegalStateException { private static final long serialVersionUID = -2507492394288153468L; public IllegalReferenceCountException() { } public IllegalReferenceCountException(int refCnt) { this("refCnt: " + refCnt); } public IllegalReferenceCountException(int refCnt, int increment) { this("refCnt: " + refCnt + ", " + (increment > 0 ? "increment: " + increment : "decrement: " + -increment)); } public IllegalReferenceCountException(String message) { super(message); } public IllegalReferenceCountException(String message, Throwable cause) { super(message, cause); } public IllegalReferenceCountException(Throwable cause) { super(cause); } }