Why there is static behind the method declaration?

Question

can we declare method without static and can we access that?

Answer 1

Yes we can make methods non-static.
You can only access something that is not static from an Object reference.

Some examples:

public class Program{

public static void main(String[] args){
Program obj = new Program();
obj.myMethod(); // OK
myMethod(); // ERROR
}
void myMethod(){}
}

class myClass(){

void method1(){
method2(); // OK
}

void method2(){
method3(); // OK
}

static void method3(){
method2(); // ERROR
}
}

Answer 2

thank you so much