From 3d2f7e07ec2ac19ffff334ce87b4a308a09cba89 Mon Sep 17 00:00:00 2001
From: PHJ2000 <105151063+PHJ2000@users.noreply.github.com>
Date: Mon, 5 Oct 2026 18:17:59 +0900
Subject: [PATCH] Preserve inherited properties without local entries

---
 src/main/java/org/json/Property.java          |  2 +-
 .../java/org/json/junit/PropertyTest.java     | 29 ++++++++++++++++++-
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/json/Property.java b/src/main/java/org/json/Property.java
index ba6c56967..bc5df3895 100644
--- a/src/main/java/org/json/Property.java
+++ b/src/main/java/org/json/Property.java
@@ -30,7 +30,7 @@ public static JSONObject toJSONObject(java.util.Properties properties) throws JS
         // can't use the new constructor for Android support
         // JSONObject jo = new JSONObject(properties == null ? 0 : properties.size());
         JSONObject jo = new JSONObject();
-        if (properties != null && !properties.isEmpty()) {
+        if (properties != null) {
             Enumeration<?> enumProperties = properties.propertyNames();
             while(enumProperties.hasMoreElements()) {
                 String name = (String)enumProperties.nextElement();
diff --git a/src/test/java/org/json/junit/PropertyTest.java b/src/test/java/org/json/junit/PropertyTest.java
index eee482fbf..268ec0a3f 100644
--- a/src/test/java/org/json/junit/PropertyTest.java
+++ b/src/test/java/org/json/junit/PropertyTest.java
@@ -17,6 +17,33 @@
  */
 public class PropertyTest {
 
+    @Test
+    public void shouldIncludeInheritedPropertiesWithoutLocalEntries() {
+        Properties defaults = new Properties();
+        defaults.setProperty("timeout", "30");
+        Properties properties = new Properties(new Properties(defaults));
+
+        JSONObject jsonObject = Property.toJSONObject(properties);
+
+        assertEquals(1, jsonObject.length());
+        assertEquals("30", jsonObject.getString("timeout"));
+    }
+
+    @Test
+    public void shouldPreferLocalPropertiesOverDefaults() {
+        Properties defaults = new Properties();
+        defaults.setProperty("timeout", "30");
+        defaults.setProperty("host", "localhost");
+        Properties properties = new Properties(defaults);
+        properties.setProperty("timeout", "60");
+
+        JSONObject jsonObject = Property.toJSONObject(properties);
+
+        assertEquals(2, jsonObject.length());
+        assertEquals("60", jsonObject.getString("timeout"));
+        assertEquals("localhost", jsonObject.getString("host"));
+    }
+
     /**
      * JSONObject from null properties object should
      * result in an empty JSONObject.
@@ -99,4 +126,4 @@ public void shouldHandleJSONProperty() {
         assertTrue("property objects should match", 
                 properties.equals(jsonProperties));
     }
-}
\ No newline at end of file
+}