diff --git a/src/json/converter/csv/builder/ColumnBuilder.java b/src/json/converter/csv/builder/ColumnBuilder.java
index 5a25668..65a56a4 100644
--- a/src/json/converter/csv/builder/ColumnBuilder.java
+++ b/src/json/converter/csv/builder/ColumnBuilder.java
@@ -35,7 +35,7 @@ public String format(String[] iRow){
 				
 				String aVal =  iRow[_key];
 				switch (_type) {
-					case INTEGER: return String.format(_format,new Integer(aVal.equals("")?"0":aVal)); 
+					case INTEGER: return String.format(_format,Integer.valueOf(aVal.equals("")?"0":aVal)); 
 					case STRING: return String.format(_format,aVal); 
 				}
 				return "";
diff --git a/src/json/converter/shp/ShpFileReader.java b/src/json/converter/shp/ShpFileReader.java
index ba3ea09..d71e8b6 100644
--- a/src/json/converter/shp/ShpFileReader.java
+++ b/src/json/converter/shp/ShpFileReader.java
@@ -303,7 +303,7 @@ public void readRecord(){
 					}
 				}
 				
-				_groupRecord._shapes.put(new Integer(aRecordNumber), aFeature);
+				_groupRecord._shapes.put(Integer.valueOf(aRecordNumber), aFeature);
 				
 			} else {
 				
diff --git a/src/json/geojson/FeatureCollection.java b/src/json/geojson/FeatureCollection.java
index dbe42df..e8f1fed 100644
--- a/src/json/geojson/FeatureCollection.java
+++ b/src/json/geojson/FeatureCollection.java
@@ -103,8 +103,8 @@ public FeatureCollection processTileElement(TileElement iTileE){
 			}
 		}
 
-		aGroupRecord._meta_properties.put("x", new Integer(iTileE.x));
-		aGroupRecord._meta_properties.put("y", new Integer(iTileE.y));	
+		aGroupRecord._meta_properties.put("x", Integer.valueOf(iTileE.x));
+		aGroupRecord._meta_properties.put("y", Integer.valueOf(iTileE.y));	
 		
 		return aGroupRecord;
 		
@@ -253,8 +253,8 @@ public FeatureCollection[][] groupGridDivide(int iZoom/*int iN, int iM*/){
 				}
 
 				aDividedResult[i][j] = aGroupRecord;
-				aGroupRecord._meta_properties.put("x", new Integer(x));
-				aGroupRecord._meta_properties.put("y", new Integer(y));
+				aGroupRecord._meta_properties.put("x", Integer.valueOf(x));
+				aGroupRecord._meta_properties.put("y", Integer.valueOf(y));
 
 			}
 
diff --git a/src/json/graphic/JenksColorifierGeojson.java b/src/json/graphic/JenksColorifierGeojson.java
index 7d9327f..9b07653 100644
--- a/src/json/graphic/JenksColorifierGeojson.java
+++ b/src/json/graphic/JenksColorifierGeojson.java
@@ -43,7 +43,7 @@ public void init(){
 				
 				if (toconvert!=null) {
 					try {
-						aArrayProp.add(new Double((String) toconvert));
+						aArrayProp.add(Double.valueOf((String) toconvert));
 					} catch (java.lang.NumberFormatException e){
 						// Unable to decode this string
 					}
@@ -83,7 +83,7 @@ public Color getColor(java.lang.Object properties) {
 
 			try {
 
-				double value = new Double((String) aProp.get(_param));
+				double value = Double.valueOf((String) aProp.get(_param));
 
 				for (int i=0;i<Colors.length; i++) {
 					if ((_ranges[i]<=value) && (_ranges[i+1]>value)){
diff --git a/src/json/topojson/topology/Topology.java b/src/json/topojson/topology/Topology.java
index 16aca59..c0fb44e 100644
--- a/src/json/topojson/topology/Topology.java
+++ b/src/json/topojson/topology/Topology.java
@@ -105,8 +105,8 @@ public void setArcs(ArcMap iArcMap){
 					
 			for (int i=0; i<aArc._points.length; i++){
 				arcs[na][i] = new java.lang.Object[2];
-				arcs[na][i][0] = new Double( aArc._points[i]._x );
-				arcs[na][i][1] = new Double( aArc._points[i]._y );
+				arcs[na][i][0] = Double.valueOf( aArc._points[i]._x );
+				arcs[na][i][1] = Double.valueOf( aArc._points[i]._y );
 			}
 			
 			na++;
@@ -180,8 +180,8 @@ public void quantize(double iPowTen){
 			double scale = Math.pow(10, iPowTen);
 			for (java.lang.Object[][] arc:arcs){
 				for (java.lang.Object[] position:arc){
-					position[0] = new Integer((int) (((Double) position[0] - aX)*scale)); 
-					position[1] = new Integer((int) (((Double) position[1] - aY)*scale));
+					position[0] = Integer.valueOf((int) (((Double) position[0] - aX)*scale)); 
+					position[1] = Integer.valueOf((int) (((Double) position[1] - aY)*scale));
 					n++;
 				}
 			}
diff --git a/unittest/graphics/CensusColorifier.java b/unittest/graphics/CensusColorifier.java
index f08ada7..07eaf8e 100644
--- a/unittest/graphics/CensusColorifier.java
+++ b/unittest/graphics/CensusColorifier.java
@@ -59,7 +59,7 @@ public void init(){
 
 						if (toconvert!=null) {
 							try {
-								aArrayProp.add(new Double((String) toconvert));
+								aArrayProp.add(Double.valueOf((String) toconvert));
 							} catch (java.lang.NumberFormatException e){
 								// Unable to decode this string
 							}
@@ -98,7 +98,7 @@ public Color getColor(java.lang.Object properties) {
 			
 			try {
 			
-				double value = new Double((String) aProp.get(_param));
+				double value = Double.valueOf((String) aProp.get(_param));
 				
 				for (int i=0;i<Colors.length; i++) {
 					if ((_ranges[i]<=value) && (_ranges[i+1]>value)){