Java IO Tutorial - Java DataInputStream.readLong()

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Syntax

DataInputStream.readLong() has the following syntax.

public final long readLong()   throws IOException

Example

In the following code shows how to use DataInputStream.readLong() method.

//from   w  w  w  . jav  a 2s  .  c  o  m
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class Main {
  public static void main(String[] args) throws IOException {

    long[] l = { 1234567898765L, 12345678909876L };

    FileOutputStream fos = new FileOutputStream("c:\\test.txt");
    DataOutputStream dos = new DataOutputStream(fos);

    for (long j : l) {
      dos.writeLong(j);
    }
    dos.flush();

    InputStream is = new FileInputStream("c:\\test.txt");
    DataInputStream dis = new DataInputStream(is);

    while (dis.available() > 0) {
      long k = dis.readLong();
      System.out.print(k);
    }
  }
}

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