How to Invoke a Static Method Using an Instance of a Class in Java?

How can I call a static method using a class object in Java?

ClassName.staticMethodName(); // Calling a static method directly via the class name.

In Java, static methods belong to the class rather than instances of the class. Although you can technically call a static method using an instance of the class, it is not recommended because it can lead to confusion about the method's nature and usage.

// Example of calling a static method
class MyClass {
    static void myStaticMethod() {
        System.out.println("Static method called");
    }
}

public class Main {
    public static void main(String[] args) {
        // Correct way to call a static method
        MyClass.myStaticMethod();
        
        // This is discouraged, but works
        MyClass obj = new MyClass();
        obj.myStaticMethod(); // Calls static method via an object
    }
}

Causes

• Static methods are associated with the class, hence they are not tied to objects created from that class.
• Static methods can be invoked without needing to create an instance of the class.

Solutions

• Use the class name to invoke static methods: `ClassName.methodName();`
• Avoid calling static methods through instance references to maintain code clarity.

Mistake: Calling a static method using an object reference can create confusion about whether the method has access to instance variables.

Solution: Always call static methods using the class name to avoid confusion.

Mistake: Assuming static methods can access instance variables directly when using the class reference.

Solution: Remember that static methods cannot access instance variables or methods unless an instance is created.