diff --git a/java/src/main/java/io/nayuki/qrcodegen/KanjiMode.java b/java/src/main/java/io/nayuki/qrcodegen/KanjiMode.java
index 9729f93..a5321ba 100644
--- a/java/src/main/java/io/nayuki/qrcodegen/KanjiMode.java
+++ b/java/src/main/java/io/nayuki/qrcodegen/KanjiMode.java
@@ -20,4 +20,5 @@ public class KanjiMode extends QrMode {
 	public QrSegment making(String str) {
 		return QrSegmentAdvanced.makeKanji(str);
 	}
+	
 }
diff --git a/java/src/main/java/io/nayuki/qrcodegen/QrMode.java b/java/src/main/java/io/nayuki/qrcodegen/QrMode.java
index 3f0127f..f5636b3 100644
--- a/java/src/main/java/io/nayuki/qrcodegen/QrMode.java
+++ b/java/src/main/java/io/nayuki/qrcodegen/QrMode.java
@@ -7,7 +7,7 @@ public abstract class QrMode {
 	int modeBits;
 	
 	// Number of character count bits for three different version ranges.
-	protected int[] numBitsCharCount;
+	protected int[] numBitsCharCount = new int[4];
 	
 	int headCost;
 	/*-- Method --*/
diff --git a/java/src/main/java/io/nayuki/qrcodegen/QrSegmentAdvanced.java b/java/src/main/java/io/nayuki/qrcodegen/QrSegmentAdvanced.java
index 50066e8..94783a9 100644
--- a/java/src/main/java/io/nayuki/qrcodegen/QrSegmentAdvanced.java
+++ b/java/src/main/java/io/nayuki/qrcodegen/QrSegmentAdvanced.java
@@ -98,12 +98,12 @@ public final class QrSegmentAdvanced {
 	}
 
 
-	private static boolean is_valid_version(int minVersion, int version) {
+	public static boolean is_valid_version(int minVersion, int version) {
 		return version == minVersion || version == 10 || version == 27;
 	}
 
 
-	private static boolean not_Valid_Version(int minVersion, int maxVersion) {
+	public static boolean not_Valid_Version(int minVersion, int maxVersion) {
 		return !(QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= QrCode.MAX_VERSION);
 	}
 	
@@ -217,12 +217,12 @@ public final class QrSegmentAdvanced {
 	}
 
 
-	private static boolean is_numeric(int convertedPoint) {
+	public static boolean is_numeric(int convertedPoint) {
 		return '0' <= convertedPoint && convertedPoint <= '9';
 	}
 
 
-	private static boolean is_alphanumeric(int convertedPoint) {
+	public static boolean is_alphanumeric(int convertedPoint) {
 		return QrSegment.ALPHANUMERIC_CHARSET.indexOf(convertedPoint) != -1;
 	}