'CodingBat - Java - String-1 "hasBad"

I hope all is well. I'm working on an algorithm in Coding Bat. I nearly have the solution at a 100%, but I have a "StringIndexOutofBoundsException" for one instance. I've given it a solid day, but I'm no closer to getting that last bit. I was wondering if someone could lend some insight.

Here's the stated problem:

*Given a string, return true if "bad" appears starting at index 0 or 1 in the string, such as with "badxxx" or "xbadxx" but not "xxbadxx". The string may be any length, including 0. Note: use .equals() to compare 2 strings.

hasBad("badxx") → true

hasBad("xbadxx") → true

hasBad("xxbadxx") → false*

Here's my code:

public boolean hasBad(String str) {
  
  if ( str.length() >= 3 && str.substring(0, 3).equals("bad") ) {
    
    return true;
    
  }
  
  if ( str.length() >= 3 && str.substring(1, 4).equals("bad") ) {
    
    return true;
    
  }
  
  if ( str.length() < 3 ) {
    
    return false;
    
  }
  
  return false;
  
}

Here are the results:

enter image description here

java


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