JAVA EE: Java Tutorial : Java IO (CharArrayReader-Copy to destArray)

Wednesday 14 September 2016

Java Tutorial : Java IO (CharArrayReader-Copy to destArray)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=fVq-AEuwVW4&list=UUhwKlOVR041tngjerWxVccw

CharArrayReaderDemo.java

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

/*
 * public int read(char[] b, int off, int len)
 *                              throws IOException
 * 
 * Parameters:
 * ----------
 *  
 * b - Destination buffer 
 * off - Offset at which to start storing characters
 * len - Maximum number of characters to read
 */

public class CharArrayReaderDemo
{

    public static void main(String[] args) throws IOException
    {
        CharArrayReader charArrayReader = null;
        try
        {

            char[] srcCharArray = "Peter won the match".toCharArray();

            charArrayReader = new CharArrayReader(srcCharArray);

            char[] destCharArray = new char[10];

            /*
             * Reads characters into a portion of an array.
             * 
             * Returns: The actual number of characters
             * read, or -1 if the end of the stream has been
             * reached
             */
            int numberOfCharsRead = charArrayReader.read(destCharArray, 0, 5);
            System.out.println("numberOfCharsRead = " + numberOfCharsRead);

            for (int i = 0; i < destCharArray.length; i++)
            {
                System.out.print(destCharArray[i]);
            }

        }
        finally
        {
            if (charArrayReader != null)
            {
                charArrayReader.close();
            }
        }

    }

}