Approach-1
  
 Source Code
  

    
      // Contributed by - Anuj Das ( GC College, Silchar - @ Department of Computer Science )
      class CommandLineArgs {
        public static void main(String[ ] args) {
        int []x = new int[100];
        int sum=0;
        for(int i=0; i < args.length; i++) {
          x[i] = Integer.parseInt(args[i]);
          sum += x[i];
        }
        System.out.println("The Sum of Integers: " + sum); 
        }
      }
       
    

cmd->  javac  CommandLineArgs.java
cmd->  java  CommandLineArgs  51  19  65  78  12

The Sum of Integers: 225

  
Approach-2
 Source Code

  
    // Contributed by - Anuj Das ( GC College, Silchar - @ Department of Computer Science )
    class CLArgs {
      public static void main(String ...args) {
      int sum=0;
      for(String number : args) {
        sum += Integer.parseInt(number);
      } 
      System.out.println("The Sum of Integers: " + sum); 
      }
    }
    
     
  

cmd->  javac  CLArgs.java
cmd->  java  CLArgs  45 75 12

The Sum of Integers: 132