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Numbers and Strings

Numbers

The Numbers Classes

Formatting Numeric Print Output

Beyond Basic Arithmetic

Summary of Numbers

Questions and Exercises

Characters

Strings

Converting Between Numbers and Strings

Manipulating Characters in a String

Comparing Strings and Portions of Strings

The StringBuilder Class

Summary of Characters and Strings

Questions and Exercises

Trail: Learning the Java Language

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Lesson: Numbers and Strings

Numbers

This section begins with a discussion of the Number class (in the java.lang package) and its subclasses. In particular, this section talks about the situations where you would use instantiations of these classes rather than the primitive data types. Additionally, this section talks about other classes you might need to work with numbers, such as formatting or using mathematical functions to complement the operators built into the language.

Strings

Strings, which are widely used in Java programming, are a sequence of characters. In the Java programming language, strings are objects. This section describes using the String class to create and manipulate strings. It also compares the String and StringBuilder classes.

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