Hi there,
As you described your question, I guess this is what you need to do.

Please do try this

class TrimTill
{
 private void trimTillIndex(String str,int sIndex,int eIndex)
 {
  String output = str.substring(sIndex, eIndex);
  System.out.println(output);
 }
 public static void main(String\u005B\u005D args)
 {
  TrimTill tt = new TrimTill();
  tt.trimTillIndex("Hello There", 6, 11);
 }
}