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25 
26 package java.util;
27 
28 /**
29  * Unchecked exception thrown when an unknown flag is given.
30  *
31  * <p> Unless otherwise specified, passing a {@code null} argument to any
32  * method or constructor in this class will cause a {@link
33  * NullPointerException} to be thrown.
34  *
35  * @since 1.5
36  */
37 public class UnknownFormatFlagsException extends IllegalFormatException {
38 
39     @java.io.Serial
40     private static final long serialVersionUID = 19370506L;
41 
42     private String flags;
43 
44     /**
45      * Constructs an instance of this class with the specified flags.
46      *
47      * @param  f
48      *         The set of format flags which contain an unknown flag
49      */
UnknownFormatFlagsException(String f)50     public UnknownFormatFlagsException(String f) {
51         if (f == null)
52             throw new NullPointerException();
53         this.flags = f;
54     }
55 
56     /**
57      * Returns the set of flags which contains an unknown flag.
58      *
59      * @return  The flags
60      */
getFlags()61     public String getFlags() {
62         return flags;
63     }
64 
65     // javadoc inherited from Throwable.java
getMessage()66     public String getMessage() {
67         return "Flags = " + flags;
68     }
69 }
70