Static method in java can call non static method

Question

It is said in java that we can not call a non-static method from a static method..what does this mean exactly ?we can always call a non static method frm static one using object although..'pls explan

• user2864740: Write code that tries to do what is reported to can't be done. Then search for the error message. You will find many duplicates like stackoverflow.com/questions/5201895/… , stackoverflow.com/questions/18375971/… (or this) possible duplicate of What is the reason behind "non-static method cannot be referenced from a static context"?

Answer 1

Here is a nice code piece to illustrate what it means:

class MyClass{
 static void func1(){
 func2(); //This will be an error
 }
 void func2(){
 System.out.println("Hello World!");
 }
}

Answer 2

To call a non-static method, you need an instance (object) - because these methods belong to an instance, and in general only make sense in the context of an instance.

Static methods don't belong to an instance - they belong to the class. So there is no need to create an instance first, you can just call MyClass.doSomething()

void foo(){
 MyClass.doSomething();
}

But you can call a non-static method from a static method provided you first create an instance.

static void bar(){
 MyObject o = new MyObject();
 o.doSomething();
}