FilesExpand file tree

 master

/

GetChannel.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

31 lines (30 loc) · 917 Bytes

 master

/

GetChannel.java

Copy path

Top

File metadata and controls

• Code
• Blame

31 lines (30 loc) · 917 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

//: io/GetChannel.java

// Getting channels from streams

import java.nio.*;

import java.nio.channels.*;

import java.io.*;

public class GetChannel {

private static final int BSIZE = 1024;

public static void main(String[] args) throws Exception {

// Write a file:

FileChannel fc =

new FileOutputStream("data.txt").getChannel();

fc.write(ByteBuffer.wrap("Some text ".getBytes()));

fc.close();

// Add to the end of the file:

fc =

new RandomAccessFile("data.txt", "rw").getChannel();

fc.position(fc.size()); // Move to the end

fc.write(ByteBuffer.wrap("Some more".getBytes()));

fc.close();

// Read the file:

fc = new FileInputStream("data.txt").getChannel();

ByteBuffer buff = ByteBuffer.allocate(BSIZE);

fc.read(buff);

buff.flip();

while(buff.hasRemaining())

System.out.print((char)buff.get());

}

} /* Output:

Some text Some more

*///:~