src/java.base/share/classes/java/util/UnknownFormatFlagsException.java

/*
 * Copyright (c) 2003, 2025, 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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 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package java.util;

/**
 * Unchecked exception thrown when an unknown flag is given.
 *
 * <p> Unless otherwise specified, passing a {@code null} argument to any
 * method or constructor in this class will cause a {@link
 * NullPointerException} to be thrown.
 *
 * @since 1.5
 */
public non-sealed class UnknownFormatFlagsException extends IllegalFormatException {

    @java.io.Serial
    private static final long serialVersionUID = 19370506L;

    /** @serial */
    private String flags;

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

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

    // javadoc inherited from Throwable.java
    public String getMessage() {
        return "Flags = " + flags;
    }
}