diff --git a/src/Cli/func/Helpers/GlobalCoreToolsSettings.cs b/src/Cli/func/Helpers/GlobalCoreToolsSettings.cs
index 288b8d406..c39decbca 100644
--- a/src/Cli/func/Helpers/GlobalCoreToolsSettings.cs
+++ b/src/Cli/func/Helpers/GlobalCoreToolsSettings.cs
@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
 using Azure.Functions.Cli.Common;
@@ -99,6 +99,13 @@ public static void Init(ISecretsManager secretsManager, string[] args)
             {
                 _currentWorkerRuntime = WorkerRuntime.None;
             }
+
+            if (_currentWorkerRuntime == WorkerRuntime.Java || args.Any(arg => string.Equals(arg, WorkerRuntime.Java.ToString(), StringComparison.OrdinalIgnoreCase)))
+            {
+                ColoredConsole
+                    .WriteLine(WarningColor($"This action is not supported when using the core tools directly. Please use one of the supported environments to test {_currentWorkerRuntime} apps locally as specified by" +
+                    $"https://learn.microsoft.com/en-us/azure/azure-functions/functions-develop-local?pivots=programming-language-java"));
+            }
         }
 
         // Test helper method to set _currentWorkerRuntime for testing purpose
diff --git a/test/Cli/Func.UnitTests/GlobalCoreToolsSettingsTests.cs b/test/Cli/Func.UnitTests/GlobalCoreToolsSettingsTests.cs
new file mode 100644
index 000000000..c2c6f342b
--- /dev/null
+++ b/test/Cli/Func.UnitTests/GlobalCoreToolsSettingsTests.cs
@@ -0,0 +1,46 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT License. See LICENSE in the project root for license information.
+
+using Azure.Functions.Cli.Helpers;
+using Azure.Functions.Cli.Interfaces;
+using Moq;
+using Xunit;
+
+namespace Azure.Functions.Cli.UnitTests
+{
+    public class GlobalCoreToolsSettingsTests
+    {
+        [Theory]
+        [InlineData("init", "--java")]
+        [InlineData("init", "--worker-runtime", "java")]
+        [InlineData("new", "--java")]
+        [InlineData("new", "--language", "java")]
+        public void Init_LogsWarning_ForJavaWorkerRuntime(params string[] args)
+        {
+            // Arrange
+            var secretsManager = new Mock<ISecretsManager>();
+
+            var stringWriter = new StringWriter();
+            var originalOut = Console.Out;
+            Console.SetOut(stringWriter);
+
+            try
+            {
+                // Act
+                GlobalCoreToolsSettings.Init(secretsManager.Object, args);
+
+                // Assert
+                var output = stringWriter.ToString();
+                Assert.Contains("This action is not supported when using the core tools directly", output);
+                Assert.Contains("java", output, StringComparison.OrdinalIgnoreCase);
+            }
+            finally
+            {
+                Console.SetOut(originalOut);
+
+                // Reset static state for other tests
+                GlobalCoreToolsSettings.SetWorkerRuntime(WorkerRuntime.None);
+            }
+        }
+    }
+}