diff --git a/js/rhino/src/org/mozilla/javascript/NativeArray.java b/js/rhino/src/org/mozilla/javascript/NativeArray.java
index 36943c9a954a..27fd6b4dd47c 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeArray.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeArray.java
@@ -62,7 +62,7 @@ public class NativeArray extends IdScriptable {
      * always gets at least an object back, even when Array == null.
      */
 
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
+    static void init(Context cx, Scriptable scope, boolean sealed) {
         NativeArray obj = new NativeArray();
         obj.prototypeFlag = true;
         obj.addAsPrototype(MAX_PROTOTYPE_ID, cx, scope, sealed);
@@ -71,7 +71,7 @@ public class NativeArray extends IdScriptable {
     /**
      * Zero-parameter constructor: just used to create Array.prototype
      */
-    public NativeArray() {
+    private NativeArray() {
         dense = null;
         this.length = 0;
     }
diff --git a/js/rhino/src/org/mozilla/javascript/NativeBoolean.java b/js/rhino/src/org/mozilla/javascript/NativeBoolean.java
index 1bf828a62036..ee440f7e1028 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeBoolean.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeBoolean.java
@@ -42,21 +42,15 @@ package org.mozilla.javascript;
  * See ECMA 15.6.
  * @author Norris Boyd
  */
-public class NativeBoolean extends IdScriptable {
+final class NativeBoolean extends IdScriptable {
 
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
-        NativeBoolean obj = new NativeBoolean();
+    static void init(Context cx, Scriptable scope, boolean sealed) {
+        NativeBoolean obj = new NativeBoolean(false);
         obj.prototypeFlag = true;
         obj.addAsPrototype(MAX_PROTOTYPE_ID, cx, scope, sealed);
     }
 
-    /**
-     * Zero-parameter constructor: just used to create Boolean.prototype
-     */
-    public NativeBoolean() {
-    }
-
-    public NativeBoolean(boolean b) {
+    private NativeBoolean(boolean b) {
         booleanValue = b;
     }
 
diff --git a/js/rhino/src/org/mozilla/javascript/NativeDate.java b/js/rhino/src/org/mozilla/javascript/NativeDate.java
index 5b988ca13f79..11b27d0d5dfd 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeDate.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeDate.java
@@ -48,9 +48,9 @@ import java.text.SimpleDateFormat;
  * See ECMA 15.9.
  * @author Mike McCabe
  */
-public class NativeDate extends IdScriptable {
+final class NativeDate extends IdScriptable {
 
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
+    static void init(Context cx, Scriptable scope, boolean sealed) {
         NativeDate obj = new NativeDate();
         obj.prototypeFlag = true;
         
@@ -60,7 +60,7 @@ public class NativeDate extends IdScriptable {
         obj.addAsPrototype(MAX_PROTOTYPE_ID, cx, scope, sealed);
     }
     
-    public NativeDate() {
+    private NativeDate() {
         if (thisTimeZone == null) {
             // j.u.TimeZone is synchronized, so setting class statics from it
             // should be OK.
diff --git a/js/rhino/src/org/mozilla/javascript/NativeError.java b/js/rhino/src/org/mozilla/javascript/NativeError.java
index 78c0b06998f6..43097b9ee7d7 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeError.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeError.java
@@ -43,9 +43,9 @@ package org.mozilla.javascript;
  *
  *  ECMA 15.11
  */
-public class NativeError extends IdScriptable {
+final class NativeError extends IdScriptable {
 
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
+    static void init(Context cx, Scriptable scope, boolean sealed) {
         NativeError obj = new NativeError();
         obj.prototypeFlag = true;
         obj.messageValue = "";
diff --git a/js/rhino/src/org/mozilla/javascript/NativeMath.java b/js/rhino/src/org/mozilla/javascript/NativeMath.java
index cbc9cf4a2f13..a56a272cb4a4 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeMath.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeMath.java
@@ -42,9 +42,9 @@ package org.mozilla.javascript;
  * @author Norris Boyd
  */
 
-public class NativeMath extends IdScriptable
+final class NativeMath extends IdScriptable
 {
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
+    static void init(Context cx, Scriptable scope, boolean sealed) {
         NativeMath obj = new NativeMath();
         obj.setSealFunctionsFlag(sealed);
         obj.setFunctionParametrs(cx);
diff --git a/js/rhino/src/org/mozilla/javascript/NativeNumber.java b/js/rhino/src/org/mozilla/javascript/NativeNumber.java
index 6884a3d12a5c..eebbec858e68 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeNumber.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeNumber.java
@@ -44,11 +44,11 @@ package org.mozilla.javascript;
  *
  * @author Norris Boyd
  */
-public class NativeNumber extends IdScriptable {
+final class NativeNumber extends IdScriptable {
 
     private static final int MAX_PRECISION = 100;
 
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
+    static void init(Context cx, Scriptable scope, boolean sealed) {
         NativeNumber obj = new NativeNumber();
         obj.prototypeFlag = true;
         obj.addAsPrototype(MAX_PROTOTYPE_ID, cx, scope, sealed);
@@ -57,11 +57,11 @@ public class NativeNumber extends IdScriptable {
     /**
      * Zero-parameter constructor: just used to create Number.prototype
      */
-    public NativeNumber() {
+    private NativeNumber() {
         doubleValue = defaultValue;
     }
 
-    public NativeNumber(double number) {
+    private NativeNumber(double number) {
         doubleValue = number;
     }
 
diff --git a/js/rhino/src/org/mozilla/javascript/NativeString.java b/js/rhino/src/org/mozilla/javascript/NativeString.java
index 2e68d8c9f8d7..b4ebb1196e64 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeString.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeString.java
@@ -52,22 +52,15 @@ import java.util.Vector;
  * @author Mike McCabe
  * @author Norris Boyd
  */
-public class NativeString extends IdScriptable {
+final class NativeString extends IdScriptable {
 
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
-        NativeString obj = new NativeString();
+    static void init(Context cx, Scriptable scope, boolean sealed) {
+        NativeString obj = new NativeString(defaultValue);
         obj.prototypeFlag = true;
         obj.addAsPrototype(MAX_PROTOTYPE_ID, cx, scope, sealed);
     }
 
-    /**
-     * Zero-parameter constructor: just used to create String.prototype
-     */
-    public NativeString() {
-        string = defaultValue;
-    }
-
-    public NativeString(String s) {
+    private NativeString(String s) {
         string = s;
     }
 
diff --git a/js/rhino/src/org/mozilla/javascript/NativeWith.java b/js/rhino/src/org/mozilla/javascript/NativeWith.java
index e0a626922b30..c1fa163904f0 100644
--- a/js/rhino/src/org/mozilla/javascript/NativeWith.java
+++ b/js/rhino/src/org/mozilla/javascript/NativeWith.java
@@ -43,9 +43,9 @@ import java.lang.reflect.Method;
  * It simply delegates every action to its prototype except
  * for operations on its parent.
  */
-public class NativeWith implements Scriptable, IdFunctionMaster { 
+public final class NativeWith implements Scriptable, IdFunctionMaster { 
     
-    public static void init(Context cx, Scriptable scope, boolean sealed) {
+    static void init(Context cx, Scriptable scope, boolean sealed) {
         NativeWith obj = new NativeWith();
         obj.prototypeFlag = true;
 
@@ -60,10 +60,10 @@ public class NativeWith implements Scriptable, IdFunctionMaster {
                                         ScriptableObject.DONTENUM);
     }
 
-    public NativeWith() {
+    private NativeWith() {
     }
 
-    public NativeWith(Scriptable parent, Scriptable prototype) {
+    NativeWith(Scriptable parent, Scriptable prototype) {
         this.parent = parent;
         this.prototype = prototype;
     }