Question

Possible Duplicate:
Java Byte Array to String to Byte Array

I have a method called READ() that accept a String parameter. This string is already have been converted into bytes. All I want is to convert into a readable string.

public static String READ(final String data) throws UnsupportedEncodingException{
   char[] temp = data.toCharArray();
   byte[] bytes = new byte[temp.length];
   int i = 0;
        
   for(char c : temp){
      bytes[i++] = (byte)c;
   }
        
   return new String(bytes, "UTF-8");
}

public static String SEND(String data) throws UnsupportedEncodingException{
   return data.getBytes()+"";
}

Testing:

String msg = "testing !";
String msgBytes = null;
   try {
        msgBytes = SEND(msg);
   } catch (UnsupportedEncodingException e2) {
        e2.printStackTrace();
   }
        
   System.out.println( "SEND: " + msgBytes);
   try {
         System.out.println("RECEIVE: " + READ(msgBytes));
   } catch (UnsupportedEncodingException e2) {
            e2.printStackTrace();
   }

And the OUTPUT IS:

SEND: [B@452467ec

RECEIVE: [B@452467ec

Answer 1

You print a byte[] which is an Object, so it just prints the reference into memory of that Object because that’s what the default implementation of toString() does.

You should print the String directly. Don’t print its byte[] representation.

What you do in your code is to transform a String into byte[] and then back to String in the wrong way.