81     public ClassNotFoundException(String s) {
  82         super(s, null);  //  Disallow initCause
  83     }
  84 
  85     /**
  86      * Constructs a <code>ClassNotFoundException</code> with the
  87      * specified detail message and optional exception that was
  88      * raised while loading the class.
  89      *
  90      * @param s the detail message
  91      * @param ex the exception that was raised while loading the class
  92      * @since 1.2
  93      */
  94     public ClassNotFoundException(String s, Throwable ex) {
  95         super(s, null);  //  Disallow initCause
  96         this.ex = ex;
  97     }
  98 
  99     /**
 100      * Returns the exception that was raised if an error occurred while
 101      * attempting to load the class. Otherwise, returns <tt>null</tt>.
 102      *
 103      * <p>This method predates the general-purpose exception chaining facility.
 104      * The {@link Throwable#getCause()} method is now the preferred means of
 105      * obtaining this information.
 106      *
 107      * @return the <code>Exception</code> that was raised while loading a class
 108      * @since 1.2
 109      */
 110     public Throwable getException() {
 111         return ex;
 112     }
 113 
 114     /**
 115      * Returns the cause of this exception (the exception that was raised
 116      * if an error occurred while attempting to load the class; otherwise
 117      * <tt>null</tt>).
 118      *
 119      * @return  the cause of this exception.
 120      * @since   1.4
 121      */
 122     public Throwable getCause() {
 123         return ex;
 124     }
 125 }

  81     public ClassNotFoundException(String s) {
  82         super(s, null);  //  Disallow initCause
  83     }
  84 
  85     /**
  86      * Constructs a <code>ClassNotFoundException</code> with the
  87      * specified detail message and optional exception that was
  88      * raised while loading the class.
  89      *
  90      * @param s the detail message
  91      * @param ex the exception that was raised while loading the class
  92      * @since 1.2
  93      */
  94     public ClassNotFoundException(String s, Throwable ex) {
  95         super(s, null);  //  Disallow initCause
  96         this.ex = ex;
  97     }
  98 
  99     /**
 100      * Returns the exception that was raised if an error occurred while
 101      * attempting to load the class. Otherwise, returns {@code null}.
 102      *
 103      * <p>This method predates the general-purpose exception chaining facility.
 104      * The {@link Throwable#getCause()} method is now the preferred means of
 105      * obtaining this information.
 106      *
 107      * @return the <code>Exception</code> that was raised while loading a class
 108      * @since 1.2
 109      */
 110     public Throwable getException() {
 111         return ex;
 112     }
 113 
 114     /**
 115      * Returns the cause of this exception (the exception that was raised
 116      * if an error occurred while attempting to load the class; otherwise
 117      * {@code null}).
 118      *
 119      * @return  the cause of this exception.
 120      * @since   1.4
 121      */
 122     public Throwable getCause() {
 123         return ex;
 124     }
 125 }