java 使用反射访问静态最终变量
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Access static final variable using reflection
提问by M S
I have a Java class with a static variable
我有一个带有静态变量的 Java 类
package com.mytest
public class MyClass{
public static final TextClass TEXT_CLASS = new TextClass();
}
How can I access the object TEXT_CLASSusing reflection?
如何TEXT_CLASS使用反射访问对象？
(I have the string "com.mytest.MyClass.TEXT_CLASS". I need to access the object.)
（我有字符串"com.mytest.MyClass.TEXT_CLASS"。我需要访问该对象。）
回答by socha23
Accessing static fields is done exactly the same way as normal fields, only you don't need to pass any argument to Field.get()method (you can pass a null).
访问静态字段的方式与普通字段完全相同，只是您不需要将任何参数传递给Field.get()方法（您可以传递一个空值）。
Try this:
试试这个：
Object getFieldValue(String path) throws Exception {
int lastDot = path.lastIndexOf(".");
String className = path.substring(0, lastDot);
String fieldName = path.substring(lastDot + 1);
Class myClass = Class.forName(className);
Field myField = myClass.getDeclaredField(fieldName);
return myField.get(null);
}
