created: 06/12/2008

CHAPTER 29B — More about Strings

String objects are frequently used in programs. This chapter provides extra practice in using them.

Chapter Topics:

Strings are Immutable
Indexing Strings
substring()
indexOf()

Note: the String class is one of the classes that Advanced Placement Computer Science students are expected to know well. This chapter was written after the author observed an unfortunate number of mistakes involving Strings in the APCS 2008 examination.

QUESTION 1:

What does the following code write?

class ImmDemo
{
  public static void main ( String[] args )
  {
    String str = new String("I recognize the vestiges of an old flame.");
    str.substring( 16 );
    System.out.println( str );
  }
}