Can't seem to get rid of OutOfBoundsException.

Here's the code in c. I am not able to get the loop right either. Not here. In java.

    #include<stdio.h>
    #include<conio.h>
    main()
    {
       char str[50];
       int i;
       printf(" Enter String\n");
       scanf("%s",str);
         for(i=0;str[i]!='\0';i++)
               {
                if(str[i]==str[i+1])
                printf ("%c\n", str[i]);
               }
         getch();
    }

How do I do it in java? And yes, I am looking for an increase in count the moment it finds pairs.

Here it is.

public class CharRepeat {
public static void main(String[] args){
int count =0;
StringBuilder sb = new StringBuilder("Hello there ppl");

for (int i = 0; i<sb.length()+1; i++){
if (sb.charAt(i) == sb.charAt(i+1))
count++;
}
System.out.println("The count is " +count);

}

}