### Question:
FileUtil { public static File getSystemTempFolder() { return new File(JAVA_TMP); } private  FileUtil(); static File getSystemTempFolder(); static File getTmpFile(final String name, final String suffix); static File getTmpFile(final byte[] data, final String name,
            final String suffix); static boolean deleteTempFiles(final File workFolder); static void close(final Closeable out); static boolean mkdir(final File file); static boolean mkdirs(final File file); static String makePath(String... parts); static final String JAVA_TMP; }### Answer:
@Test public void testGetSystemTempFolder() { FileUtil.getSystemTempFolder(); }