Chapter 9.7, Problem 9.7.3CP

Can you invoke an instance method or reference an instance variable from a static method? Can you invoke a static method or reference a static variable from an instance method? What is wrong in the following code?

1. 1. public class C {
2. 2. public static void main(String[) args) {
3. 3. method1();
4. 4. }
5. 5.
6. 6. public void method1 () {
7. 7. method2();
8. 8. }
9. 9.
10. 10. public static void method2() {
11. 11. System.out.println( "What is radius" + c.getRadius());
12. 12. }
13. 13.
14. 14. Circle c new Circle();
15. 15. }