Error when calling Java code in Grails

Question

I have issues with calling the java class from grails application.

Controller class:

class MyController{

    def index() { 
         somepkg.MyJavaClass.method()
    }
}

Java class:

package somepkg;

public class MyJavaClass{

    public void method() {
           // ... some logic here
    }
}

The error:

No signature of method: static somepkg.MyJavaClass.method() is applicable for argument types: () values: [] Possible solutions: wait(), any(), find(), wait(long), each(groovy.lang.Closure), find(groovy.lang.Closure)

Somehow you don't mention what the problem is so it's hard to help you. One thing is on my mind though - are you aware of the fact that object have to be created before you can call it's method? — lukelazarovic
– lukelazarovic, Commented Feb 11, 2014 at 12:53

lukelazarovic · Accepted Answer · 2014-02-11 13:01:03Z

1

If you want to call a method of a class without creating an instance, the method has to be marked static:

public static void afada() throws FileNotFoundException, UnsupportedEncodingException{
  PrintWriter writer = new PrintWriter("ediOrder.txt", "UTF-8");
  writer.println("a");
  writer.close();
}

or you have to create an instance first:

new examplepkg.testing().afada()

answered Feb 11, 2014 at 13:01

lukelazarovic

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