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sesha boddapatisesha boddapati 

Method does not exist or incorrect signature:void

public class FirstClass {
    public static void firstMethod() {
        System.debug('hello world');
  }
}

this sample code shows the error be like

"Method does not exist or incorrect signature: void firstMethod() from the type FirstClass"
Best Answer chosen by sesha boddapati
Rounak SharmaRounak Sharma
Hello Sesha,
This is working fine in my system. Please refresh it. 

User-added image

Please let me know if it helps
thanks

All Answers

Rounak SharmaRounak Sharma
Hello Sesha,
This is working fine in my system. Please refresh it. 

User-added image

Please let me know if it helps
thanks
This was selected as the best answer
sesha boddapatisesha boddapati
hi Rounak,
            Thank you, I get the error ,when i was executed the program can please show me your executed results(logs)
sesha boddapatisesha boddapati
Hi Rounak,
ThamkYou , Now it's working 
 
Rounak SharmaRounak Sharma
hello sesha,
Please mark it as the best answer so that the loop will be closed.
Thanks