// "Replace with 'StringBuilder.repeat()'" "true"
import java.util.Objects;

class Test {
  String hundredTimes(String s) {
    Objects.requireNonNull(s);
    StringBuilder sb = new StringBuilder();
    f<caret>or(int i=0; i<100; i++) {
      sb.append(s);
    }
    return sb.toString();
  }
}