1. Move method, rename

2. bitBufferToCodewords in QrCode
3.Feature envy. It calls only BitBuffer method. Moved it to BitBuffer
and renamed it.

java/src/main/java/io/nayuki/qrcodegen/BitBuffer.java

@@ -128,9 +128,18 @@ public final class BitBuffer implements Cloneable {
 
 
 	// Pad with alternating bytes until data capacity is reached
-	void addPad(int dataCapacityBits) {
+	public void addPad(int dataCapacityBits) {
 		for (int padByte = 0xEC; bitLength() < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
 			appendBits(padByte, 8);
 	}
+
+
+	// Pack bits into bytes in big endian
+	public byte[] toCodewords() {
+		byte[] dataCodewords = new byte[bitLength() / 8];
+		for (int i = 0; i < bitLength(); i++)
+			dataCodewords[i >>> 3] |= getBit(i) << (7 - (i & 7));
+		return dataCodewords;
+	}
 	
 }

java/src/main/java/io/nayuki/qrcodegen/QrCode.java

@@ -175,7 +175,7 @@ public final class QrCode {
 		bitBuffer.addPad(dataCapacityBits);
 		
 		
-		byte[] dataCodewords = bitBufferToCodewords(bitBuffer);
+		byte[] dataCodewords = bitBuffer.toCodewords();
 		
 		// Create the QR Code object
 		return new QrCode(version, errorCorrectionLevel, dataCodewords, mask);
@@ -183,15 +183,7 @@ public final class QrCode {
 
 	/*---- Private helper methods for encodeSegments ----*/
 
-	// Pack bits into bytes in big endian
+	
-	private static byte[] bitBufferToCodewords(BitBuffer bitBuffer) {
-		byte[] dataCodewords = new byte[bitBuffer.bitLength() / 8];
-		for (int i = 0; i < bitBuffer.bitLength(); i++)
-			dataCodewords[i >>> 3] |= bitBuffer.getBit(i) << (7 - (i & 7));
-		return dataCodewords;
-	}
-
-
 	// Add terminator and pad up to a byte if applicable
 	private static void addTerminator(BitBuffer bitBuffer, int dataCapacityBits) {
 		bitBuffer.appendBits(0, Math.min(4, dataCapacityBits - bitBuffer.bitLength()));