Have students label a string’s index values to help them understand how to use Java’s substring method.

It is easier for students to choose the correct starting and ending arguments for substring when they have visual reference for characters and indices of the string.
The following is an example table containing string character values and index values.

String Values	h	e	l	l	o
Index Values	0	1	2	3	4

Tags

AP A
Java

External Source

Leigh Ann Sudol-DeLyser’s notes from 2009 AP CS A exam.

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Other Tips By Leigh Ann Sudol-DeLyser