Hi, I would like to have a program that takes the name of a method at runtime:
>>java ProgramFoo meth1
And calls the method from ProgramFoo. Now, ProgramFoo has an instance varible to store the method's name:
>>String method = args[0];
but what syntax do i use to actually call the method?
thank you, tom
> Hi, I would like to have a program that takes the
> name of a method at runtime:
> >>java ProgramFoo meth1
> And calls the method from ProgramFoo. Now, ProgramFoo
> has an instance varible to store the method's name:
> >>String method = args[0];
>
> ut what syntax do i use to actually call the method?
>
> thank you, tom
you need to know a little more than just the method name. suppose, for instance, your class has 2 methods with the same name:
public class ProgramFoo {
public void doSomething() {
// blah
}
public void doSomething(int val) {
// blah
}
}
which one is to be invoked? what you're looking for is [url=http://java.sun.com/docs/books/tutorial/reflect/index.html]reflection[/url] but it's not quite as simple as just knowing the method name
right, no overloading here. ill read up on reflection.
the project is for a COSC2030 class....rather than ProgramFoo, i have built SimpleProfiler. All it does is time the tested method(int n) for various n.
So I want to run SImpleProfiler as such:
>>java SimpleProfiler Foo.method1 50 500 1500 3000 5000
The program would then do its stuff and call Foo.method1(n) for each of the specified n values. The program is complete other than I have to code Foo.method rather then specify at runtime.
for my lab, there is only three methods to test. no big deal, i can just code method one , compile, then code method 2, recompile, code method 3, recompile.
But I would like to learn how to pass method n with our recode/recompile just for the sack of knowing a bit more and ill be using SimpleProfiler for future labs.
-Tom
