Saving and Loading Issues

[mathgeek314]

Okay, so I have two methods, one to save selected arrow keys to a text file, and the other to load them as integers. Here's the first:

public void saveKeys()
{
   String out = Integer.toString(left)+"\n"+Integer.toString(right)+"\n"+Integer.toString(up)+"\n"+Integer.toString(down)+"\n";
   try
   {
      PrintWriter save = new PrintWriter("key_selection.txt",out);
   }
   catch ( Exception e )
   {
            System.err.print(e);
   }
}

...which gives me this error message:

java.io.UnsupportedEncodingException: 37
39
38
40
 

After inputting what it should have saved into the save file ("37\n39\n38\n40\n"), here is the code I made:

public void loadKeys()
{
   try
   {
      FileInputStream fis = new FileInputStream("key_selection.txt");
      BufferedInputStream bis = new BufferedInputStream(fis);
      String in = "";
      while ( bis.read() > -1 )
      {
         in += (char)bis.read();
      }
      System.out.println(in);
   }
   catch ( Exception e )
   {
      System.err.println(e);
   }
}

...which gives me this as output:

7
9
8
 
 

(There should be a zero on line 4, but I don't know why there isn't.)

What am I doing wrong? Please help!