Please Give me an example for User defined Exception

N B Patil

Nov 17th, 2005

extend the Class from Exception and you can use the same for your purposewith either of the four constructors Exception() Constructs a new exception with null as its detail message.Exception(String message) Constructs a new exception with the specified detail message.Exception(String message, Throwable cause) Constructs a new exception with the specified detail message and cause.Exception(Throwable 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).MyException extends Exception { MyExeception(String msg) { super(msg); } //}

simran

Nov 17th, 2005

User defined exceptions are exceptions uncured handled by user by defining extended class from exception and throws,throw keyword

alajangi rajeswari

Nov 19th, 2005

throw

shankar singh

Nov 20th, 2005

Please Give me an example for User defined Exception
Answer:

nagaraju.balla

Nov 22nd, 2005

class NoMoneyException extends Exception{
       public NoMoneyException(String m){super(m);}}
       public class Bank {
      public static void main(String[] args) throws NoMoneyException{
      int b=5000,wd=15000;
    if(b>wd){System.out.println("Enjoy");}
else {throw new NoMoneyException("Insufficient Money Exception");}
}}

nagarajcse82
Profile Answers by nagarajcse82

Nov 28th, 2005

in case of system defined exceptions,if any violation occured while executing the code,it will create a exception object and throw that object.
in catch block u catch it and give appropriate message.
userdefined exception:in case of user defined exceptions,create a class as a subclass of java.lang.Throwable and implement   toString() method in your class.
Example:
public class UserException extends java.lang.Throwable{
private String ex;
public UserException()
{
}
public UserException(String s)
{
    ex=s;
}
public String toString()
{
return ex;
}
}
public class App{
public static void main(String args[])
{
//take the value from key board   if it is equal to exception generate user defined exception
InputStreamReader isr=new InputStreamReader(System.in);
BufferedReader br=new BufferedReader(isr);
try{
if(br.readLine()=="exception"){

    UserExceptin ue=new User Exception("this is the user defined exception");
throw ue;
}
}
catch(Exception e)
{
System.out.println(e);
}
}