I don't undersand the error that I am getting

Question

here is my code for reference
public class shop5{      
     public static void main(String[]args){
        int aftersixsum=0;//int is set to 0
         int[]array4 = new int[args.length-1];//creates a new int array that has up to spot four, and five spots overall
      for(int i=0;i<args.length-1;i++)//scans the command line
          args[i] = Integer.parseInt(args);//turns all of the command line arguments into ints
          if(args[i].equals(6))//if (while scanning) i is equal to 6
               for(int j = i;j<args.length-1;j++)//scan from i to the end of the new array of ints
                    array4[i] = args[j];//put in the empty array 6 as well as all the numbers after 6 into this new array
     for(int i = 1;i<array4.length;i++)//scan the new array starting from the second position
          aftersixsum+=array4[i];//(because 6 would be at the first spot) sum all of the numbers after 6
System.out.println(aftersixsum);
}When I run it with the input 5 4 3 6 2, i get the error:
Exception in thread "main" java.lang.NoClassDefFoundError: lab5
The purpose is to take in a group of command line integer arguments, and to print out the sum of all the numbers after 6.   I need to watch out for when the last spot is 6.
I have commented out what I think happens when the program runs.  I am thinking that the problem is in this line: args[i] = Integer.parseInt(args[i]);Could anyone help me?  Thank you much in advance.
PS: how close are my comments to what is actually going on?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

your code has some errors during the compilation time
you can't assign the integer value to string
args[i] = Integer.parseInt(args);//turns all of the command line arguments into ints
its one of the error.
this is next error -> here your assigning a string value to int
array4[i] = args[j];