Can i use a String to call methods in java?

Asked 7 years ago

Active 7 years ago

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I want to be able to call myMethod() by using Function. in my code i have a long list of available functions and would like the user to pick one without an if then system. any help?

 public static void main(String[] args) {
    String Function = "myMethod";
    Function();
    }

edited Mar 05 '18 at 21:58

shmosel

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asked Mar 05 '18 at 21:54

Nimrod Rappaport

why not just test for the condition and call the method if it matches the criteria you specified – John Kane Mar 05 '18 at 21:56
Lol.. You expect "String" to be callable? Alternatively the only thing I can think of is to use that string to find the function in the current class and call it via reflection. – Brandon Mar 05 '18 at 21:56
1

You can, if you use reflection, but you probably shouldn't. It's often easier to store strings and methods in a `Map` and use that to bind the two. – markspace Mar 05 '18 at 21:58
@JohnKane What do you mean? – Nimrod Rappaport Mar 05 '18 at 21:59
1

@Nimrod Rappaport for example: if(methodName.equals("runSomething"))Object.runSomething; – John Kane Mar 05 '18 at 22:01
1

You could also use the command pattern https://stackoverflow.com/a/8200427/4645510 – Kudu2 Mar 05 '18 at 22:07
Functors may be a better solution. – Dragonthoughts Mar 05 '18 at 22:13

Can i use a String to call methods in java?

0 Answers0