public Exception() 
{
                                   
        super();
}

Constructs a new exception with null as its detail message. The cause is not initialized, and may subsequently be initialized by a call to #initCause .

 public Exception(String message) 
{
        super(message);
}

Constructs a new exception with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to #initCause .

Parameters:

message - the detail message. The detail message is saved for later retrieval by the #getMessage() method.

 public Exception(Throwable cause) 
{
        super(cause);
}

Constructs a new exception with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause). This constructor is useful for exceptions that are little more than wrappers for other throwables (for example, java.security.PrivilegedActionException ).

Parameters:

cause - the cause (which is saved for later retrieval by the #getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

since: 1.4 -

 public Exception(String message,
    Throwable cause) 
{
        super(message, cause);
}

Constructs a new exception with the specified detail message and cause.

Note that the detail message associated with cause is not automatically incorporated in this exception's detail message.

Parameters:

message - the detail message (which is saved for later retrieval by the #getMessage() method).

cause - the cause (which is saved for later retrieval by the #getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

since: 1.4 -