#vulnerable code 
                                @Test
    public void loadModelIllegalArgument() throws Exception {

        try {
            dataReaderFacade.loadModel(new GcResourceFile("http://"));
        }
        catch (DataReaderException e) {
            assertNotNull("cause", e.getCause());
            Class expectedClass;
            if (System.getProperty("java.version").startsWith("14")) {
                expectedClass = IOException.class;
            } else {
                expectedClass = IllegalArgumentException.class;
            }
            assertEquals("expected exception in cause",
                    expectedClass.getName(),
                    e.getCause().getClass().getName());
        }
    } 
                            #location 10 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void loadModelIllegalArgument() throws Exception {

        try {
            dataReaderFacade.loadModel(new GcResourceFile("http://"));
        }
        catch (DataReaderException e) {
            assertNotNull("cause", e.getCause());
            Class expectedClass;
            String javaVersion = System.getProperty("java.version");
            if (javaVersion.startsWith("14") || javaVersion.startsWith("15")) {
                expectedClass = IOException.class;
            } else {
                expectedClass = IllegalArgumentException.class;
            }
            assertEquals("expected exception in cause",
                    expectedClass.getName(),
                    e.getCause().getClass().getName());
        }
    }