Java Beginners - Java For Beginners Java Exception Rating: 5.0/5 (1 vote cast) |
Level : Beginners
Author : Arunkumar S
Download Source : exception.zip
Java Exception - User Defined ExceptionProgrammers could also create user-defined exceptions, specific to their business. Let's say you are in business selling bikes and need to validate a customers order. Create a new class TooManyBikesException that is derived from the class Exception or Throwable, and if someone tries to order more bikes than you can ship - just throw this exception: /**
*
* @author Arunkumar Subramaniam
*
*/ public class ArunException extends Exception{ public ArunException(Exception e){
super(e);
}
} /**
*
* @author Arunkumar Subramaniam
*
*/
public class TestException {
void hello()throws ArunException{
try{
int i=0;
i=10/i;
}catch(ArithmeticException e){
throw new ArunException(e);
}
}
void altHello()throws Exception{
int i=10;
i=10/i;
if(i==1){
throw new ArunException(new Exception("by mi2arun"));
}
}
public static void main(String str[]){
TestException t=new TestException();
try {
t.hello();
} catch (ArunException e) {
e.printStackTrace();
}
try {
t.altHello();
} catch (ArunException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
} output : ArunException: java.lang.ArithmeticException: / by zero
at TestException.hello(TestException.java:9)
at TestException.main(TestException.java:26)
Caused by: java.lang.ArithmeticException: / by zero
at TestException.hello(TestException.java:7)
... 1 more
ArunException: java.lang.Exception: by mi2arun
at TestException.altHello(TestException.java:18)
at TestException.main(TestException.java:31)
Caused by: java.lang.Exception: by mi2arun
... 2 more
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