What is the benefit of static in a method/function

Question

hello,
can u explain the benefit of static in a function?
and why i cannot called a function in a static method..example :
class jalaninFungsi{
     public static void main(String args[])
          tesfungsi();
     public  void tesfungsi()
          System.out.println("ini tesfungsi");
}its produce error : non-static method tesfungsi() cannot be referenced from static context
thanks.

Answer 1

A class is an object.
So for example:
class STUDENT
public String getStudentName()
return name;
public int getStudentGPA()
return GPA;
In this case, to be able to call the function getStudentName() and getStudentGPA() you will actually need a STUDENT object.
That means you must have declared e.g. STUDENT A; (in the main method for example), then to call those two functions above you'll need to write A.getStudentName(); and A.getStudentGPA();
HOWEVER if you have static method, you don't need to create an object of that class type. You can just simply call the class name and then use the dot operator and call the function. e.g.:
class STUDENT
public static String getStudentName()
return name;
public static int getStudentGPA()
return GPA;
Notice that these are static methods, so to access these methods you just need to write STUDENT.getStudentName(); or STUDENT.getStudentGPA();
Again, notice that here I don't use A . but instead I used the class name (STUDENT.)
However, this is not logically correct in this (my) particular case to make those two methods static. You'll need to read more by yourself about the usage of static method. I am just trying to explain it to you why there is such thing called static methods in java.
- o.z.