AP CSA Student Practice

Review Videos

Check out the AP CSA review video series.

Strings

For the AP Exam, you will need to use the following methods:

int length()
String substring(int from, int to)
String substring(int from)
int indexOf(String str)
boolean equals(Object other)
int compareTo(String other)
String[] split(String del)

Use the following examples to learn and practice creating String objects and using each of these methods.

Creating and Assigning Simple Strings of Characters

Learn how to create and assign a String variable in Java, and see what happens when you reassign it.
Learn what happens when you assign one String variable to another, and then reassign the first one.
Learn what happens when you assign one String variable to another, and then reassign the first one.
Learn what happens when you assign one String variable to another, and then reassign the first one.

Getting the Length of a String with the length() Method

Getting a Substring from a String and an Index with substring()

Finding the Index of a String in Another String with indexOf()

Comparing Strings with == and equals()

Using compareTo() to Get the Rank of a Name in Alphabetical Order

Splitting a String of Characters with split()