j2me - heap

public String readDataClient() {
    	byte[] data = new byte[512];
    	try {
    		int len = con.receive(data);
    		String msg = new String(data, 0, len);
    		return msg;
    	}
    	catch (Exception e)
    	{ System.out.println("readData(): " + e);
    	return null;
    	}
    } // end of readData()
    
    public String[] readDataServer() {
    	byte[] data = new byte[512];
    	try {
    		int len = con.receive(data);
    		String msg = new String(data, 0, len);
    		String[] msgReturn= split(msg,"|"); 
    		return msgReturn;
    	}
    	catch (Exception e)
    	{ System.out.println("readData(): " + e);
    	return null;
    	}
    } // end of readData()
    
    public boolean sendMessage(String msg){
    	byte[] msgBytes = msg.getBytes();
    	if (msgBytes.length > 512) {
    		System.out.println("Message too long, sending \"??\" instead");
    		msgBytes = "??".getBytes();
    	}
    	try {
    		con.send(msgBytes);
    		return true;
    	}
    	catch (Exception e)
    	{ System.out.println("sendMessage(): " + e);
    	return false;
    	}
    } // end of sendMessage()