Exceptions

Question

Can anyone explain to me what exceptions are? I really don't get it.

Answer 1

https://www.sololearn.com/learn/Java/2175/?ref=app

https://www.sololearn.com/learn/Java/2176/?ref=app

Answer 2

See also this code by LukArToDo:

https://code.sololearn.com/cE5BpKwo33DN/?ref=app

Answer 3

Exceptions are errors/problems:
Some examples:

String str = null;
System.out.println(str.length());
-> an empty String has no length()

int x = 3;
int y = 0;
System.out.println(x/y);
-> dividing by zero

Having a Scanner scan:
int x = scan.nextInt();
If you don't enter an integer you will get an error message.

If you want to open a file which does not exist...

With exception handling you can catch this exceptions and decide what to do. Your program will not just crash.

Answer 4

Exceptions are just errors in your code