Alternate Addition of any Number

import java . util .Scanner;
class Ac{
static void acceptData(){
String str="";
int sum=0,sum1=0;
System.out.println("Enter the String ::");
Scanner in = new Scanner(System.in);
str = in.nextLine();
char ch[] = str.toCharArray();
int ch1[] = new int[ch.length];
int a[] = new int[ch1.length];
for(int i=0;i<ch.length;i++)
System.out.print(ch[i]);
for(int i=0;i<ch.length;i++)
{
ch1[i] = java.lang.Integer.parseInt(String.valueOf(str.charAt(i)));
}
for(int j=0;j<ch1.length;j++)
{
if(j==0 || j%2==0)
sum+=ch1[j];
else
sum1+=ch1[j];
}
System.out.println("Sum::" + sum);
System.out.println("Sum1::" + sum1);
}
public static void main(String args[]){
acceptData();
}
}