Consider the following codeString s=null; Which code fragments cause an object of type NullPointerException to be thrown

Any code fragment that attempts to call a method or access a property of the variable s will cause a NullPointerException to be thrown because s has not been initialized to reference any object. For example:

1. s.length();
2. int length = s.length();
3. if (s.equals("hello")) { // do something }
4. int hashCode = s.hashCode();