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CharArrayReader class

java.lang.Object

java.io.Reader

java.io.CharArrayReader

This class implements a character buffer that can be used as a character-input stream.

Constructor	Summary
CharArrayReader(char[] buf)	Creates a CharArrayReader from the specified array of chars.
CharArrayReader(char[] buf, int offset, int length)	Creates a CharArrayReader from the specified array of chars.

Return	Method	Summary
void	close()	Closes the stream and releases any system resources associated with it.
void	mark(int readAheadLimit)	Marks the present position in the stream.
boolean	markSupported()	Tells whether this stream supports the mark() operation, which it does.
int	read()	Reads a single character.
int	read(char[] b, int off, int len)	Reads characters into a portion of an array.
boolean	ready()	Tells whether this stream is ready to be read.
void	reset()	Resets the stream to the most recent mark, or to the beginning if it has never been marked.
long	skip(long n)	Skips characters.

Revised from Open JDK source code


import java.io.CharArrayReader;
import java.io.IOException;

public class Main {
  public static void main(String args[]) throws IOException {
    CharArrayReader inStream;
    inStream = new CharArrayReader(new char[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' });
    int ch = 0;
    StringBuffer sb = new StringBuffer("");
    while ((ch = inStream.read()) != -1)
      sb.append((char) ch);
    String s = sb.toString();
    System.out.println(s.length() + " characters were read");
    System.out.println("They are: " + s);

  }
}

The output:


10 characters were read
They are: java2s.com

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