UseJava: OUTPUT_DIR must exists in all cases.

Fixes: #17316

Modules/UseJava.cmake

@@ -516,6 +516,8 @@ function(add_jar _TARGET_NAME)
     endforeach()
 
     set(CMAKE_JAVA_CLASS_OUTPUT_PATH "${_add_jar_OUTPUT_DIR}${CMAKE_FILES_DIRECTORY}/${_TARGET_NAME}.dir")
+    # ensure output directory exists
+    file (MAKE_DIRECTORY "${CMAKE_JAVA_CLASS_OUTPUT_PATH}")
 
     set(_JAVA_TARGET_OUTPUT_NAME "${_TARGET_NAME}.jar")
     if (_add_jar_OUTPUT_NAME AND _add_jar_VERSION)

Tests/CMakeLists.txt

@@ -3261,6 +3261,18 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P ${CMake_SOURCE_DIR}/Utilities/Release
           --build-options ${build_options}
           --test-command ${JAVA_RUNTIME} -classpath hello2.jar HelloWorld)
         list(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/JavaJarSourceList")
+        add_test(Java.JarSourceListAndOutput ${CMAKE_CTEST_COMMAND}
+          --build-and-test
+          "${CMake_SOURCE_DIR}/Tests/Java"
+          "${CMake_BINARY_DIR}/Tests/JavaJarSourceListAndOutput"
+          ${build_generator_args}
+          --build-project hello
+          --build-target hello3
+          --build-two-config
+          --build-run-dir "${CMake_BINARY_DIR}/Tests/JavaJarSourceListAndOutput/hello3"
+          --build-options ${build_options}
+          --test-command ${JAVA_RUNTIME} -classpath hello3.jar HelloWorld)
+        list(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/JavaJarSourceListAndOutput")
 
         # For next test, java tool must have same architecture as toolchain
         math(EXPR _object_mode "${CMAKE_SIZEOF_VOID_P} * 8")

Tests/Java/CMakeLists.txt

@@ -11,3 +11,6 @@ add_jar(hello A.java HelloWorld.java)
 # use listing file to specify sources
 file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/java_fileslist "A.java\nHelloWorld.java\n")
 add_jar(hello2 @${CMAKE_CURRENT_BINARY_DIR}/java_fileslist)
+
+# use listing file to specify sources and specify output directory (issue #17316)
+add_jar(hello3 @${CMAKE_CURRENT_BINARY_DIR}/java_fileslist OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/hello3")