DuplicateFormatFlagsException.java

/*
 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package java.util;

/**
 * Unchecked exception thrown when duplicate flags are provided in the format
 * specifier.  
 *
 * <p> Unless otherwise specified, passing a <tt>null</tt> argument to any
 * method or constructor in this class will cause a {@link
 * NullPointerException} to be thrown.
 *
 * @since 1.5
 */
public class DuplicateFormatFlagsException extends IllegalFormatException {

    private static final long serialVersionUID = 18890531L;

    private String flags;

    /**
     * Constructs an instance of this class with the specified flags.
     *
     * @param  f
     *         The set of format flags which contain a duplicate flag.
     */
    public DuplicateFormatFlagsException(String f) {
 	if (f == null)
 	    throw new NullPointerException();
	this.flags = f;
    }

    /**
     * Returns the set of flags which contains a duplicate flag.
     *
     * @return  The flags
     */
    public String getFlags() {
	return flags;
    }

    public String getMessage() {
	return String.format("Flags = '%s'", flags);
    }
}