class Main {
static int myStaticNumber = 0;
int myNumber;
/**
* Constructor to init myNumber
*/
public Main(int myNumber){
this.myNumber = myNumber;
}
/**
* static main method can access method(param) directly
*/
public static void main(String[] args) {
int number = staticMethod(3);
//Not that main cannot access instanceMethod()
// because there is on object to operate on.
// So to use it, we must create an object of Main
Main main = new Main(3);
//Now we can use instanceMethod()
int otherNumber = main.instanceMethod();
System.out.println("Number 1:" + number + ", Number 2: " + otherNumber);
}
/**
* Static here means that i have to invoke it
* using
* Main.staticMethod(param)
*
* note static method can't access myNumber
* This is because it's not a static variable.
*
*/
public static int staticMethod(int var){
return 7 * var;
}
/**
* Instance method can access myNumber because it
* works on the instance of the object.
*
* It can also invoke staticMethod
*
* It can also access static variables
*/
public int instanceMethod(){
return Main.staticMethod(myNumber);
}
}
