Made the no-argument constructors of the VS* suite of Java classes public.

trick_source/java/src/trick/common/utils/vs/VSBoolean.java

@@ -2,7 +2,7 @@ package trick.common.utils.vs;
 
 public class VSBoolean extends VSValue<Boolean> {
 
-    protected VSBoolean() {
+    public VSBoolean() {
         this(false);
     }
 

trick_source/java/src/trick/common/utils/vs/VSByte.java

@@ -4,7 +4,7 @@ import java.math.BigInteger;
 
 public class VSByte extends VSValue<Byte> {
 
-    protected VSByte() {
+    public VSByte() {
         this((byte)0);
     }
 

trick_source/java/src/trick/common/utils/vs/VSDouble.java

@@ -2,7 +2,7 @@ package trick.common.utils.vs;
 
 public class VSDouble extends VSValue<Double> {
 
-    protected VSDouble() {
+    public VSDouble() {
         this(0);
     }
 

trick_source/java/src/trick/common/utils/vs/VSFloat.java

@@ -2,7 +2,7 @@ package trick.common.utils.vs;
 
 public class VSFloat extends VSValue<Float> {
 
-    protected VSFloat() {
+    public VSFloat() {
         this(0);
     }
 

trick_source/java/src/trick/common/utils/vs/VSInteger.java

@@ -4,7 +4,7 @@ import java.math.BigInteger;
 
 public class VSInteger extends VSValue<Integer> {
 
-    protected VSInteger() {
+    public VSInteger() {
         this(0);
     }
 

trick_source/java/src/trick/common/utils/vs/VSLong.java

@@ -4,7 +4,7 @@ import java.math.BigInteger;
 
 public class VSLong extends VSValue<Long> {
 
-    protected VSLong() {
+    public VSLong() {
         this(0);
     }
 

trick_source/java/src/trick/common/utils/vs/VSShort.java

@@ -4,7 +4,7 @@ import java.math.BigInteger;
 
 public class VSShort extends VSValue<Short> {
 
-    protected VSShort() {
+    public VSShort() {
         this((short)0);
     }
 

trick_source/java/src/trick/common/utils/vs/VSString.java

@@ -2,7 +2,7 @@ package trick.common.utils.vs;
 
 public class VSString extends VSValue<String> {
 
-    protected VSString() {}
+    public VSString() {}
 
     public VSString(String value) {
         super(value);

trick_source/java/src/trick/common/utils/vs/VSValue.java

@@ -30,7 +30,8 @@ public abstract class VSValue<T> implements VariableServerFluent, Cloneable {
 
     @Override
     public String toString() {
-        return value.toString();
+        // This method works even when value is null.
+        return String.valueOf(value);
     }
 
     @Override