Why we write e in catch in java exception,what is the meaning of e?

Question

catch(Exception e)
{
code of block
}
what is e here in catch brackets.

Answer 1

'e' is just a variable. ('e' stands for exception, but you can rename it anything you like, however, the data type has to remain 'Exception') The 'e' variable stores an exception-type object in this case.

Your 'catch' block will literally 'catch'' an exception object that was 'thrown' at some point during a 'try' block and store it in the 'e' variable (a.k.a parameter)

Inside your catch block, you can choose to throw 'e' again and some higher-level process can catch the exception object (like yours can/did). If there are no other catch blocks at a higher level when it is thrown, the exception will cause the program to halt.

Answer 2

You can think of it in the same way as a method parameter - you define a type followed by an identifier.
e is just the name of the Exception in the catch block, you can give it whichever name you like

Answer 3

this is for unexpected errors or missing somthing in your code

Answer 4

just the name of refrence.. because the object is class is exception so object name is start as e...

Answer 5

catch(Exception e)
{
System.out.println(e);
}
in this "e" is reference variable. exception pass to the output. you can pass any reference value like c/e/n as your wish

Answer 6

'e' is just a parameter its means catch block can recieve an argument and the Data type of argument is exception datatype

Answer 7

It's explained in the above comments already. I will just give an example how it can be used in a code.

For example, consider we are catching an Arithmetic Exception while dividing a number by 0.

catch(ArithmeticException e) {
System.out.println(e.toString());
throw new ArithmeticException();
}

This will print a string in Stack Trace, because of e.toString().

java.lang.ArithmeticException: / by zero

So it's fair to say that e is a variable which store some information about the Arithmetic Exception.

Hope it helps.

Answer 8

e is a object of exception class

Answer 9

If we don't catch exception
Exception catching is a good practice