Java CharArrayReader Class

The CharArrayReader class in Java is used to read a character array as a character input stream.

In this chapter, we will learn what the CharArrayReader class is, why it is used, its declaration, constructors, important methods, and how to read character arrays using examples.

What is CharArrayReader Class in Java?

The CharArrayReader class allows a character array to be treated as a character input stream. This means data stored in a character array can be read sequentially just like reading data from a file or any other reader.

It extends the Reader class and is mainly used when character data is already available in memory and needs to be processed using stream-based APIs.

CharArrayReader Class Declaration

The following declaration shows how the CharArrayReader class is defined:

Constructors of CharArrayReader Class

The CharArrayReader class provides constructors to create a reader from a character array.

1. CharArrayReader(char[] buf)

This constructor creates a reader that uses the given character array as its input source.

Syntax:

Here is the syntax:

2. CharArrayReader(char[] buf, int offset, int length)

This constructor creates a reader that reads a specified portion of the character array.

Syntax:

Here is the syntax:

Example of CharArrayReader Class Constructors

The following code shows how the constructors of the CharArrayReader class are used.

Methods of CharArrayReader Class

The CharArrayReader class provides methods to read character data from the array.

Examples of Java CharArrayReader Class

The following examples demonstrate how to read character data using the Java CharArrayReader class.

Example 1: Reading Characters from a Character Array

The following example demonstrates how to read characters sequentially from a character array using the CharArrayReader class.

Output:

j : 106
a : 97
v : 118
a : 97
t : 116
p : 112
o : 111
i : 105
n : 110
t : 116

Example 2: Reading a Portion of a Character Array

The following example demonstrates how to read only a specific portion of a character array using the CharArrayReader class.

Output:

Java