Java set string as class name to run

Question

I have a question, i have a code like below:

controller.start(c.class, 1);

but i want to set "c" from console. I can get/set it from args on main method . but how can i put it on c.class ? I mean how can i do that?

String a = "c";

controller.start(a.class,1);

Of course it doesnt work , but i hope i can tell u about my problem

On php we can use $$string to set/get string to variable, but i dont know how can we do it on Java ?

Class c = Class.forName(siteClass); controller.start(c, 1); its working , so thanks @SotiriosDelimanolis :)) — Muhammet Arslan
– Muhammet Arslan, Commented Mar 9, 2014 at 23:53
Class c = Class.forName(siteClass); c.parseData(page); method on c cant runnable ? how can i call parseData method on c ? — Muhammet Arslan
– Muhammet Arslan, Commented Mar 11, 2014 at 9:21

Artem · Accepted Answer · 2014-03-10 00:19:16Z

1

More commonly used (and more secure) way of addressing this is using maps:

private static final Map<String, Class<?>> NAME_TO_CLASS = new Map<>();
static {
  NAME_TO_CLASS.put("c", c.class);
  ...
}

static void main(String[] args) {
  ...
  controller.start(NAME_TO_CLASS.get(args[0]), 1);
}

Of course in real life you'd want to check if argument is correct and is in the map NAME_TO_CLASS.contains(your_arg);

answered Mar 10, 2014 at 0:19

Artem

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Muhammet Arslan Over a year ago

Class c = Class.forName(siteClass); c.parseData(page); method on c cant runnable ? how can i call parseData method on c ?

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