How to use a java try catch statement

1) try catch finally in finally will be executed under any circumstances, and the execution time is before the program return.

2) the Java compiler does not allow display of statement blocks that cannot be executed. For example, after return, there may be no other statement blocks (the branches do not belong to this column). Therefore, the following program compilation

An error occurred while capturing the instance.

Public class MainClass {
Public static void main (String args []) {
Int d,;

Try {
D = 0;
A = 42/d;
System. out. println ("This will not be printed .");
} Catch (ArithmeticException e ){//
System. out. println ("Division by zero .");
    }
System. out. println ("After catch statement .");
  }
}

Try can have no catch, try can also be used with finally {}, but a try must have one of catch or finally.

Also, if you do not want to process it in this method, but process it together in the called method, you can directly add throws Exception after the method signature, that is, the parentheses after the method name, throwing exceptions to others

Instance

Import java. util. Random;

Public class MainClass {
Public static void main (String args []) {
Int a = 0, B = 0, c = 0;
Random r = new Random ();

For (int I = 0; I <32000; I ++ ){
Try {
B = r. nextInt ();
C = r. nextInt ();
A = 12345/(B/c );
} Catch (ArithmeticException e ){
System. out. println ("Division by zero .");
A = 0; // set a to zero and continue
      }
System. out. println ("a:" + );
    }
  }
}