Java.io.CharArrayReader Class in Java

The CharArrayReader class in Java is part of the java.io package and allows you to read characters from a character array (char[]) as a stream. It extends the Reader class and is mainly used when you want to treat a character array as an input source, similar to reading from files or other streams.

Class Declaration

public class CharArrayReader extends Reader

• Package: java.io
• Superclass: Reader
• Implements: Closeable, AutoCloseable

Constructors of CharArrayReader

CharArrayReader provides two constructors

• CharArrayReader(char[] char_array): Creates a CharArrayReader using the entire character array.
• CharArrayReader(char[] char_array, int offset, int maxlen): Creates a CharArrayReader starting from a specific offset and reading only maxlen characters.

Important Methods of CharArrayReader

1. read()

Reads a single character from the input stream and returns it as an integer

J A V A 

2. read(char[] buffer, int offset, int length)

Reads characters into a portion of the specified array from the given offset for a given length.

HEL

3. ready()

Checks whether the stream is ready to be read. Since it’s memory-based, it’s always ready unless closed.

Reader is ready to read.

4. skip(long n)

Skips the specified number of characters in the stream.

C D E 

5. mark(int readAheadLimit)

Marks the current position in the stream so it can be returned to later using reset().

XYZ
After reset: Y Z P Q 

6. markSupported()

Returns true indicating that the mark() and reset() methods are supported.

markSupported(): true

7. reset()

Resets the stream to the most recently marked position or to the beginning if no mark was set.

HEL
After reset: E L L O 

8. close()

Closes the reader and releases resources.