public class QueueEmptyException extends Exception { private static final long serialVersionUID = 1L; public QueueEmptyException() { } public QueueEmptyException(String message) { super(message); } public QueueEmptyException(Throwable cause) { super(cause); } public QueueEmptyException(String message, Throwable cause) { super(message, cause); } public QueueEmptyException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }