The input and output of a program’s data is usually referred to as I/O. There are many different ways that a Java program can perform I/O. In this lesson, we present some very simple ways to handle text input typed in at the keyboard as well as how to format text to the screen. The Advanced Placement subset does not require that you know how to use any specific input and output classes, only that you know how to use I/O in some manner. This curriculum will use the Scanner class and the printf() method provided with Java 1.5.
The key topics for this lesson are:
- Reading Input with the
Scanner Class
- Multiple Line Stream Output Expressions
- Formatting Output
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