Save and read text using FileChannel with CharBuffer : CharBuffer « File « Java Tutorial






import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class MainClass {

  public static void main(String[] args) throws Exception {
    FileChannel fc = new FileOutputStream("data2.txt").getChannel();
    ByteBuffer buff = ByteBuffer.allocate(24); // More than needed
    buff.asCharBuffer().put("Some text");
    fc.write(buff);
    fc.close();

    fc = new FileInputStream("data2.txt").getChannel();
    buff.clear();
    fc.read(buff);
    buff.flip();
    System.out.println(buff.asCharBuffer());

  }
}
/*  */
Some text








11.43.CharBuffer
11.43.1.Buffer Equality
11.43.2.Use CharBuffer
11.43.3.Convert ByteBuffer to a CharBuffer
11.43.4.Use while loop to read a CharBuffer
11.43.5.Save and read text using FileChannel with CharBuffer
11.43.6.Test the effects of buffer flipping
11.43.7.Test buffer duplication
11.43.8.Create a CharBuffer and put in some string
11.43.9.Buffer slice
11.43.10.Wrap a char array to a CharBuffer
11.43.11.Flip a CharBuffer
11.43.12.Get array out of CharBuffer
11.43.13.Convert ByteBuffer to CharBuffer
11.43.14.Fill String to CharBuffer
11.43.15.CharBuffer warps a ByteBuffer