add validity check for JSONObject constructors

* fixes #713
* document JSONException in JavaDoc
* remove unused Comparable<T> boundary to reuse GenericBean in test

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

@@ -9,6 +9,7 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.mockito.Mockito.mock;
@@ -1972,7 +1973,7 @@ public class JSONObjectTest {
     @Test
     public void jsonObjectToStringSuppressWarningOnCastToMap() {
         JSONObject jsonObject = new JSONObject();
-        Map<String, String> map = new HashMap();
+        Map<String, String> map = new HashMap<>();
         map.put("abc", "def");
         jsonObject.put("key", map);
 
@@ -3283,7 +3284,7 @@ public class JSONObjectTest {
     @SuppressWarnings("boxing")
     @Test
     public void testGenericBean() {
-        GenericBean<Integer> bean = new GenericBean(42);
+        GenericBean<Integer> bean = new GenericBean<>(42);
         final JSONObject jo = new JSONObject(bean);
         assertEquals(jo.keySet().toString(), 8, jo.length());
         assertEquals(42, jo.get("genericValue"));
@@ -3627,4 +3628,25 @@ public class JSONObjectTest {
                 .put("b", 2);
         assertFalse(jo1.similar(jo3));
     }
+
+    private static final Number[] NON_FINITE_NUMBERS = { Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NaN,
+            Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY, Float.NaN };
+
+    @Test
+    public void issue713MapConstructorWithNonFiniteNumbers() {
+        for (Number nonFinite : NON_FINITE_NUMBERS) {
+            Map<String, Number> map = new HashMap<>();
+            map.put("a", nonFinite);
+
+            assertThrows(JSONException.class, () -> new JSONObject(map));
+        }
+    }
+
+    @Test
+    public void issue713BeanConstructorWithNonFiniteNumbers() {
+        for (Number nonFinite : NON_FINITE_NUMBERS) {
+            GenericBean<Number> bean = new GenericBean<>(nonFinite);
+            assertThrows(JSONException.class, () -> new JSONObject(bean));
+        }
+    }
 }

src/test/java/org/json/junit/data/GenericBean.java

@@ -9,7 +9,7 @@ import java.io.StringReader;
  * @param <T>
  *            generic number value
  */
-public class GenericBean<T extends Number & Comparable<T>> implements MyBean {
+public class GenericBean<T extends Number> implements MyBean {
     /**
      * @param genericValue
      *            value to initiate with