Java IO Tutorial - Java RandomAccessFile .setLength (long newLength)

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Syntax

RandomAccessFile.setLength(long newLength) has the following syntax.

public void setLength(long newLength)  throws IOException

Example

In the following code shows how to use RandomAccessFile.setLength(long newLength) method.

// www. j av a 2  s  .c  o m
import java.io.*;

public class Main {

   public static void main(String[] args) {
      try {
         RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

         raf.writeUTF("Hello World from java2s.com");

         // set the file pointer at 0 position
         raf.seek(0);

         // print the string
         System.out.println(raf.readUTF());

         // print current length
         System.out.println(raf.length());

         // set the file length to 30
         raf.setLength(30);

         System.out.println(raf.length());
         raf.close();
      } catch (IOException ex) {
         ex.printStackTrace();
      }

   }
}

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