Find sum of two numbers

Exercise 1.1 Write a program in Java to find sum of two numbers. 1

class Sum
{
    public static void main( String args[] )
    {
        int a=10, b=20, c;
        c = a + b;
        System.out.println("Sum = " + c);
    }
}

Exercise 1.2 WAP to input two numbers and find sum. 1

import java.util.Scanner;
class Sum2
{
    public static void main( String args[] )
    {
        int a, b, c;
		Scanner sc = new Scanner(System.in);
        System.out.println("Enter 1st number: ");
		a=sc.nextInt();
        System.out.println("Enter 2nd number: ");
		b=sc.nextInt();
		c=a+b;
        System.out.println("Sum = " + c);
    }
}