Program Code
 package assignment;

 class Sum {

  int add(int n1, int n2){
    return n1+n2;
  }
  int add(int n1, int n2, int n3){
    return n1+n2+n3;
  }
  int add(int n1, int n2, int n3, int n4){
    return n1+n2+n3+n4;
  }
  double add(double n1, double n2){
   return n1+n2;
  }
  double add(double n1, double n2,double n3){
   return n1+n2+n3;
  }
  double add(double n1, double n2,double n3,double n4){
  return n1+n2+n3+n4;
  }
  public static void main(String args[] ){
   Sum obj = new Sum();
   System.out.println("Sum of two integer numbers: "+obj.add(71, 12));
   System.out.println("Sum of three integer numbers: "+obj.add(71, 12, 14));
   System.out.println("Sum of integer four integer numbers: "+obj.add(71, 53, 14));
   System.out.println("Sum of two double numbers: "+obj.add(71.67, 12.78));
   System.out.println("Sum of three double numbers: "+obj.add(71.2, 12.4, 56.34));
   System.out.println("Sum of four double numbers: "+obj.add(71.67, 12.78, 5.5, 10.06));
  }
 }
Code Objective
Explanation
Output