fixed demo compile error

java/android/src/io/nayuki/qrcodegen/QrCodeAndroid.java

@@ -16,7 +16,7 @@ public class QrCodeAndroid {
      * @return a bitmap representing this QR Code, with padding and scaling
      * @throws IllegalArgumentException if the scale or border is out of range
      */
-    public Bitmap toBitmap(QrCode qrCode, int scale, int border, Bitmap.Config config) {
+    public static Bitmap toBitmap(QrCode qrCode, int scale, int border, Bitmap.Config config) {
         if (scale <= 0 || border < 0)
             throw new IllegalArgumentException("Value out of range");
         final int size = qrCode.size;

java/demo/build.gradle

@@ -1,4 +1,5 @@
 dependencies {
     compile project(':core')
     compile project(':javase')
+    compile project(':svg')
 }

java/demo/src/io/nayuki/qrcodegen/QrCodeGeneratorDemo.java

@@ -56,7 +56,7 @@ public final class QrCodeGeneratorDemo {
         File imgFile = new File("hello-world-QR.png");  // File path for output
         ImageIO.write(img, "png", imgFile);             // Write image to file
 
-        String svg = qr.toSvgString(4);  // Convert to SVG XML code
+        String svg = QrCodeJavaSVG.toSvgString(qr, 4);  // Convert to SVG XML code
         try (Writer out = new OutputStreamWriter(
                 new FileOutputStream("hello-world-QR.svg"),
                 StandardCharsets.UTF_8)) {

java/svg/src/io/nayuki/qrcodegen/QrCodeJavaSVG.java

@@ -12,7 +12,7 @@ public class QrCodeJavaSVG {
      * @param border the number of border modules to add, which must be non-negative
      * @return a string representing this QR Code as an SVG document
      */
-    public String toSvgString(QrCode qr, int border) {
+    public static String toSvgString(QrCode qr, int border) {
         if (border < 0)
             throw new IllegalArgumentException("Border must be non-negative");
         final int size = qr.size;