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Code: Alles auswählen

	int ReadInt(String packet, int index )
	{
		byte[] bytes = new byte[4];	
		
		bytes[0] = packet.getBytes()[index + 0];
		bytes[1] = packet.getBytes()[index + 1];
		bytes[2] = packet.getBytes()[index + 2];
		bytes[3] = packet.getBytes()[index + 3];
		
		DataInputStream dinput = new DataInputStream( new ByteArrayInputStream(bytes) );		
		int integer;
		
		try
		{	
			integer = dinput.readInt();
		}	
		catch( IOException e )
		{
			// dann eben nid
			integer = -1;
			System.out.println("Exception in ReadInt32()");
		}
			
		System.out.println(integer);
		return integer;	
	}

Code: Alles auswählen

    ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
    DataOutputStream dataOut = new DataOutputStream(byteOut);
    dataOut.writeUTF("Hallo Welt");
    dataOut.writeInt(12345);
    dataOut.writeFloat(12345.6789f);
    dataOut.close();
    byte[] packet = byteOut.toByteArray();
    //packet senden...

Code: Alles auswählen

    //packet empfangen...
    DataInputStream dataIn = new DataInputStream(new ByteArrayInputStream(packet));
    System.out.println("Ein String: " + dataIn.readUTF());
    System.out.println("Ein Integer: " + dataIn.readInt());
    System.out.println("Ein Float: " + dataIn.readFloat());
    dataIn.close();