java program to add two numbers using different Methods

simple arithmetic using command line argument

1    

      class CommanLine

  {  public static void main(String args[]){  

     int a,b,c=0;

      a=Integer.parseInt(a[0]); 

       b=Integer.parseInt(a[1]); 

     c=a+b;

5 System.out.println("sum is"+c);  

     

7  }  

8  }  

using scanner 

import java.util.Scanner;
class Add_CMD {
  public static void main(String[] args){
   int a,b,c;
   System.out.println("Enter integers ");
   Scanner in = new Scanner(System.in);
   a = in.nextInt();
   b = in.nextInt();
   c=a+b;
   System.out.println("Sum of "  + a+ " and " + b + " is " +c);

  }
}

 using BufferedReader
import java.io.*;
class Arithmatic
{
public static void main(String args[])throws IOException
{
try
{
int a,b,c,ae,nfe;
InputStreamReader isr=new InputStreamReader(System.in);
BufferedReader br=new BufferedReader(isr);
a=Integer.parseInt(br.readLine());
b=Integer.parseInt(br.readLine());
c=a/b;
System.out.println("Result="+c);
}
/*catch(ArithmeticException ae)
{
System.out.println("eror due to"+ ae.getMessage());
}
catch(NumberFormatException nfe)
{
System.out.println("error due to"+ nfe.getMessage());
}*/
catch(Exception nfe)
{
System.out.println("error due to"+ nfe.getMessage());


}

}}