assertEquals("-X555", values[2]);
        assertEquals("-X666", values[3]);
        assertEquals("-X777", values[4]);
        assertEquals("-X999", values[5]);
    }

    @Test
    public void test_getJavaVersion_edgeCases() {
        // Test with null java.version property
        System.clearProperty("java.version");
        assertEquals(8, JvmUtil.getJavaVersion());

        // Test with empty string