通过反射获取枚举的值

首先，您需要使您

key

private String key; // I made it private on purpose

然后，您需要在枚举中添加getter方法，该方法将返回

key

public String getKey() {    return key;}

然后将

for

for (Object obj : objects) {    Class<?> clzz = obj.getClass();    Method method = clzz.getDeclaredMethod("getKey");    String val = (String) method.invoke(obj);    System.out.println("value : " + val); // prints SytemRunning, SystemStopped and tmpIdle}