Abhay, Java - rextester

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//'main' method must be in a class 'Rextester'.
//openjdk version '11.0.5'

import java.util.*;
import java.lang.*;

class Rextester
{  
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter a sentence");
        String ss=sc.nextLine();
        ss+=" ";
        String wrd="";
        String arr[]=new String[500];
        int ar[]=new int[500];
        int k=0;
        int ln=ss.length();
        char ch=ss.charAt(ln-2);
        if(ch=='.'||ch==','||ch=='?'||ch=='!')
        {
         for(int i=0; i<ln-1; i++)
         {
             char c=ss.charAt(i);
             if(c!=' ')
                 wrd+=c;
             else
             {
                 int s=0;    
                 int ln2=wrd.length();
                 for(int j=0; j<ln2; j++)
                 {
                     char ch2=wrd.charAt(j);
                     s+=(int)ch2;
                 }
                 arr[k]=wrd;
                 ar[k]=s;
                wrd=""; 
                k++;
             }
         }
                    int temp = 0;
            String word="";
  for(int i=0; i<k-1; i++)
        {
            for(int j=i+1; j<k; j++)
            {
                if(ar[i]>ar[j])
                {
                    temp = ar[i];
                    ar[i] = ar[j];
                   ar[j]= temp;
                word =arr[i];
                    arr[i]=arr[j];
                    arr[j]=word;
                }
            }
        }
         
             for(int x=0; x<k; x++)
                 System.out.print(arr[x]+" ");
        }
        else 
            System.out.println("Invalid input");
    }
}

[ - ] Show input
Compilation time: 1.02 sec, absolute running time: 0.46 sec, cpu time: 0.48 sec, memory peak: 33 Mb, absolute service time: 1,65 sec