Error: Cannot make a static reference to the non-static method

Question

Below is a java code. I attempt to call method1 and method2 and I got this error:
Cannot make a static reference to the non-static method but If I add the keyword static in front of my method1 and method2 then I would be freely call the methods with no error!
Anyone has an idea about such error? and I wrote all code in the same one file.
public class Lab1 {
     public static void main(String[] args) {
          method1(); //error
     public  void method1 ()
     public  void method2 ()
}

Answer 1

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