Adress java comments

java/vector/src/main/codegen/templates/AbstractPromotableFieldWriter.java

@@ -75,7 +75,7 @@ public void endList() {
 
   <#list vv.types as type><#list type.minor as minor><#assign name = minor.class?cap_first />
     <#assign fields = minor.fields!type.fields />
-  <#if minor.class != "Decimal" && minor.class != "BigDecimal">
+  <#if minor.class != "Decimal" && minor.class != "Decimal256">
   @Override
   public void write(${name}Holder holder) {
     getWriter(MinorType.${name?upper_case}).write(holder);
@@ -108,7 +108,7 @@ public void writeBigEndianBytesToDecimal(byte[] value) {
   }
   <#elseif minor.class == "Decimal256">
   @Override
-  public void write(BigDecimalHolder holder) {
+  public void write(Decimal256Holder holder) {
     getWriter(MinorType.DECIMAL256).write(holder);
   }
 

java/vector/src/main/codegen/templates/ArrowType.java

@@ -169,7 +169,7 @@ public static class ${name} extends <#if type.complex>ComplexType<#else>Primitiv
     <#if type.name == "Decimal">
     // Needed to support golden file integration tests.
     @JsonCreator
-    public static Decimal createDecimal128(
+    public static Decimal createDecimal(
       @JsonProperty("precision") int precision,
       @JsonProperty("scale") int scale,
       @JsonProperty("bitWidth") Integer bitWidth) {

java/vector/src/main/codegen/templates/UnionListWriter.java

@@ -249,7 +249,7 @@ public void writeBigEndianBytesToDecimal(byte[] value, ArrowType arrowType){
     writer.setPosition(writer.idx() + 1);
   }
 
-  public void writeDecimal256(int start, ArrowBuf buffer, ArrowType arrowType) {
+  public void writeDecimal256(long start, ArrowBuf buffer, ArrowType arrowType) {
     writer.writeDecimal256(start, buffer, arrowType);
     writer.setPosition(writer.idx()+1);
   }