When should I use a new block of try statement?

Question

Because I am a little bit confusing...

Answer 1

When you think that there is something in the program, it may give the exception, for example, that the user enters a value of the integer type and is required to enter a value of the type String.
So you do a try block to avoid the error and the program keeps running, meaning it does not stop.

Answer 2

If your program has possibility to contain more than one exceptions. Than you have to Cath multiple exceptions. If don't want do this, than Catch all the exceptions.

I.e .1
try{

}catch(IOException e){

//Catches single exception

}

I.e.2
//Catches both exception
try{

}catch(IOException e){

}catch(NullpointerExeption e){

}

I.e.3 try{

}catch(Exception e){

//Catches all the exception

}