title: Write String with array as bytes to a file using DataOutputStream
body: <p>I want all data of Latitude and Longitude which input by user being wrote into WriteGPSData.txt. But this code only write the last input of Latitude and Longitude. Help me solved this.</p>
  
  <pre><code>import java.io.DataOutputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import javax.swing.JOptionPane;
  
  public class GPS_main {
  
      public static void main(String[] args) {
          String strFilePath = "WriteGPSData.txt";
          try {
              System.out.println("+++=====GPS POINTS=======+++");
              // GPS p1 = new GPS ();
              GPS[] p2;
              p2 = new GPS[3];
              p2[0] = new GPS();
              // GPS p2 = new GPS();
              for (int i = 0; i &lt; p2.length; i++) {
                  p2[i] = new GPS();
                  String aa = JOptionPane.showInputDialog("Enter latitude: ");
                  double a = Double.parseDouble(aa);
                  p2[i].setLat(a);
                  String bb = JOptionPane.showInputDialog("Enter longitude: ");
                  double b = Double.parseDouble(bb);
                  p2[i].setLon(b);
                  // System.out.println(p2[i].toGPSString());
                  FileOutputStream fos = new FileOutputStream(strFilePath);
                  DataOutputStream dos = new DataOutputStream(fos);
                  String a2 = Double.toString(a);
                  String b2 = Double.toString(b);
                  // System.out.println("hello"+a2+b2);
                  dos.writeBytes(a2 + "  " + b2);
                  dos.close();
              }
          } catch (IOException e) {
              System.out.println("IOException : " + e);
              // System.out.println("   ");
          }
      }
  }
  </code></pre>
  
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