如何从存储在变量中的字符串调用 Java 函数
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How to call Java function from string stored in a Variable
提问by Lizard
Possible Duplicate:
Calling a method named “string” at runtime in Java and C
I need to be able to call a function, but the function name is stored in a variable, is this possible. e.g:
我需要能够调用一个函数，但函数名存储在一个变量中，这可能吗？例如：
public void foo ()
{
//code here
}
public void bar ()
{
//code here
}
String functionName = "foo";
// i need to call the function based on what is functionName
// 我需要根据 functionName 调用函数
Anyhelp would be great, thanks
Anyhelp会很棒，谢谢
采纳答案by polygenelubricants
Yes, you can, using reflection. However, consider also Effective Java 2nd Edition, Item 53: Prefer interfaces to reflection. If at all possible, use interfaces instead. Reflection is rarely truly needed in general application code.
是的，你可以，使用反射。但是，也请考虑Effective Java 2nd Edition，第 53 条：首选接口而不是反射。如果可能，请改用接口。一般应用程序代码中很少真正需要反射。
See also
也可以看看
Related questions
相关问题
回答by Robin
Easily done with reflection. Some examples hereand here.
The main bits of code being
代码的主要部分是
String aMethod = "myMethod";
Object iClass = thisClass.newInstance();
// get the method
Method thisMethod = thisClass.getDeclaredMethod(aMethod, params);
// call the method
thisMethod.invoke(iClass, paramsObj);
回答by unbeli
With the reflectionAPI. Something like this:
使用反射API。像这样的东西：
Method method = getClass().getDeclaredMethod(functionName);
method.invoke(this);
