public class AppTest {    private NodeClass nodeClass;    public static String  hehe = "hehe";    public String xixi = "xixi";    public void test() {        Field[] fields = AppTest.class.getDeclaredFields();        try {            for (Field field : fields) {                field.setAccessible(true);                if(field.getType().toString().endsWith("java.lang.String") && Modifier.isStatic(field.getModifiers()))                    System.out.println(field.getName() + " , " + field.get(AppTest.class));            }        } catch (Exception e) {            e.printStackTrace();        }    }}