Java_ExceptionHandling

ExpHand1.java

//default throw our catch
public class ExpHand1 {
    public static void main(String[] a) {
        try {
            System.out.println("INSIDE TRY l1");
            String s = null;
            int len = s.length();//null pointer exception
//          int tmp = 5 / 0;//arithmetic exception
            System.out.println("INSIDE TRY l3");//not executed
        }
        catch(NullPointerException | ArithmeticException x){
            System.out.println("Exception: "+x.getMessage());
        }
        //finally is always executed after our catch or just before default catch.
        finally {
            System.out.println("INSIDE FINALLY");
        }
    }
}

ExpHand2.java

//our throw our catch
public class ExpHand2 {
    public static void main(String[] args){
        int bal = 7000;
        int wdl = 8000;//input from user.
        try{
            if(bal < wdl){
                throw new ArithmeticException("Insufficient Funds");
            }
            System.out.println("Txn Successful");
            bal-=wdl;
            System.out.println("Available balance :"+bal);
        }
        catch(ArithmeticException e){
            System.out.println("Exception : "+e.getMessage());
        }
       finally {
            System.out.println("Program continues.");
        }
    }
}