如何在java中获得一个常量?

basically I need to get a constant for a class however I have no instance of the object but only its class. In PHP I would do constant(XYZ); Is there a similar way of retrieving a constant in JAVA?

基本上，我需要为一个类获得一个常量，但是我没有对象的实例，只有它的类。在PHP中，我使用常量(XYZ);在JAVA中有类似的检索常量的方法吗?

I need it to facilitate a dynamic getMethod call

我需要它来促进动态getMethod调用

Class parameterType = Class.forName(class_name);
object.setProperty(field name, field value, parameterType);

the set property method would then get the correct method and set the specified property, however I cant get a method which has int as parameter type without using Interger.TYPE

然后，set property方法将获得正确的方法并设置指定的属性，但是，如果不使用Interger.TYPE，则不能获得具有int作为参数类型的方法

4 个解决方案

#1

I am not sure what you want to get out. But it shouldn't be too difficult to show you an example.

我不知道你到底想要什么。但是给你们举个例子应该不难。

Lets say you have a Class Foo with property bar.

假设您有一个具有属性栏的类Foo。

Class Foo {
    private final String bar = "test";
    public String getBar() {return bar;}
}

Now to get this through reflection you would:

现在要通过反思来得到这个结果，你会:

Class fooClass = Foo.class;
Object fooObj = fooClass.newInstance();
Method fooMethod = fooClass.getMethod("getBar");
String bar = (String) fooMethod.invoke(fooObj);

Now you will get value of method getBar() in bar variable

现在您将在bar变量中获得方法getBar()的值

4 个解决方案

#1

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