NumberFormatException and Exception hierarchy.

NumberFormatException and Exception hierarchy.
When we catch an exception with catch clause, we should catch exception from narrow to wide. Otherwise compiler will give a compilation error.
Here is a simple example to illustrate the NumberFormatException and usage of Exception hierarchy.

class NumberFormat{
    void throwExcep(){
        String s=null;
        int [] val={1,2,3,4,5};
        String ss="ABCD";
       
        try{
        int i=Integer.parseInt(ss);
        }
        catch(NumberFormatException np){
            System.out.println("NumberFormat");
       
        }
        catch(ArrayIndexOutOfBoundsException ae){
            System.out.println("ArrayIndexOutOfBounds");
        }
        catch(Exception e){
            System.out.println("Exception");
        }               
   
    }
    public static void main(String args[]){
        NumberFormat nf= new NumberFormat();
        nf.throwExcep();
    }
}