Addition of Numbers by Using Command Line Argument in Java

HERE IS THE CODE:

1. class Addition
2. {
3.    public static void main(String [] args)
4.      {
5.        int i,sum=0;
6.         for(i=0;i<args.length;i++)
7.            {
8.                 sum=sum+Integer.parseInt(args[i]);               // main line of the program.
9.             }
10.         System.out.println("the sum of the command line arguments="+sum);
11.       }
12. }

If you only write 

sum=sum+args[i];

then sure some error will come. see the error in the below.....

error: incompatible types: String cannot be converted to int

sum=sum+args[i];

This will come in the cmd.

Because command line arguments are string type and sum variable(name in my code) is a integer type variable .So if we add a Integer type and a String type value then surely give a error. 

So what can we do??

Answer: convert the String type value to the corresponding Integer type value.

 But how can we do??

Answer: Use of Integer.parseInt() method. This is the method of the wapper class(Integer).This is a static method .so without creating a object of the Integer class ,we can invoke the Integer.parseInt() method.