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25 
26 package java.util;
27 
28 /**
29  * Unchecked exception thrown when the argument corresponding to the format
30  * specifier is of an incompatible type.
31  *
32  * <p> Unless otherwise specified, passing a <tt>null</tt> argument to any
33  * method or constructor in this class will cause a {@link
34  * NullPointerException} to be thrown.
35  *
36  * @since 1.5
37  */
38 public class IllegalFormatConversionException extends IllegalFormatException {
39 
40     private static final long serialVersionUID = 17000126L;
41 
42     private char c;
43     private Class<?> arg;
44 
45     /**
46      * Constructs an instance of this class with the mismatched conversion and
47      * the corresponding argument class.
48      *
49      * @param  c
50      *         Inapplicable conversion
51      *
52      * @param  arg
53      *         Class of the mismatched argument
54      */
IllegalFormatConversionException(char c, Class<?> arg)55     public IllegalFormatConversionException(char c, Class<?> arg) {
56         if (arg == null)
57             throw new NullPointerException();
58         this.c = c;
59         this.arg = arg;
60     }
61 
62     /**
63      * Returns the inapplicable conversion.
64      *
65      * @return  The inapplicable conversion
66      */
getConversion()67     public char getConversion() {
68         return c;
69     }
70 
71     /**
72      * Returns the class of the mismatched argument.
73      *
74      * @return   The class of the mismatched argument
75      */
getArgumentClass()76     public Class<?> getArgumentClass() {
77         return arg;
78     }
79 
80     // javadoc inherited from Throwable.java
getMessage()81     public String getMessage() {
82         return String.format("%c != %s", c, arg.getName());
83     }
84 }
85