Refactoring: Fix sonarqube reliability issues

src/main/java/org/json/XML.java

@@ -9,6 +9,7 @@
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.util.Iterator;
+import java.util.NoSuchElementException;
 
 /**
  * This provides static methods to convert an XML text into a JSONObject, and to
@@ -80,7 +81,7 @@ private static Iterable<Integer> codePointIterator(final String string) {
             public Iterator<Integer> iterator() {
                 return new Iterator<Integer>() {
                     private int nextIndex = 0;
-                    private int length = string.length();
+                    private final int length = string.length();
 
                     @Override
                     public boolean hasNext() {
@@ -89,6 +90,9 @@ public boolean hasNext() {
 
                     @Override
                     public Integer next() {
+                        if (!hasNext()) {
+                            throw new NoSuchElementException();
+                        }
                         int result = string.codePointAt(this.nextIndex);
                         this.nextIndex += Character.charCount(result);
                         return result;

src/test/java/org/json/junit/JSONObjectTest.java

@@ -3117,12 +3117,13 @@ public void testJSONWriterException() {
 
         // test a more complex object
         writer = new StringWriter();
-        try {
-            new JSONObject()
+
+        JSONObject object = new JSONObject()
                 .put("somethingElse", "a value")
                 .put("someKey", new JSONArray()
-                        .put(new JSONObject().put("key1", new BrokenToString())))
-                .write(writer).toString();
+                        .put(new JSONObject().put("key1", new BrokenToString())));
+        try {
+            object.write(writer).toString();
             fail("Expected an exception, got a String value");
         } catch (JSONException e) {
             assertEquals("Unable to write JSONObject value for key: someKey", e.getMessage());
@@ -3133,17 +3134,18 @@ public void testJSONWriterException() {
                 writer.close();
             } catch (Exception e) {}
         }
-       
+
         // test a more slightly complex object
         writer = new StringWriter();
-        try {
-            new JSONObject()
+
+        object = new JSONObject()
                 .put("somethingElse", "a value")
                 .put("someKey", new JSONArray()
                         .put(new JSONObject().put("key1", new BrokenToString()))
                         .put(12345)
-                 )
-                .write(writer).toString();
+                 );
+        try {
+            object.write(writer).toString();
             fail("Expected an exception, got a String value");
         } catch (JSONException e) {
             assertEquals("Unable to write JSONObject value for key: someKey", e.getMessage());