public class FloatTest {
 
   public static String A = "JerryTest";
 
 
FloatTest tool = new FloatTest();
 
  System.out.println(tool.A);
 
  Object classObject = FloatTest.class;
 
 
 
用下面的代码从class对象里打印出静态field的value：
 
FloatTest tool = new FloatTest();
 
System.out.println(tool.A); // approach1: print static field via one class instance
 
 
Object classObject = FloatTest.class;
 
Class<FloatTest> convert = (Class<FloatTest>)classObject;
 
Field[] fields = convert.getFields();
 
Field staticField = fields[0];
 
  try {
 
  System.out.println("static field value: " + staticField.get(tool)); // approach2: via class 
 
 } catch (IllegalArgumentException e) {
 
  // TODO Auto-generated catch block
 
  e.printStackTrace();
 
 } catch (IllegalAccessException e) {
 
  // TODO Auto-generated catch block
 
  e.printStackTrace();
 
 }