What does the term 'static' mean?

In programming, the term "static" can refer to various concepts, but most often it denotes something related to compile-time or class membership, rather than a specific instance of an object.

• Static Binding: The determination of the called function occurs at compile time, not at runtime. This is opposed to dynamic binding.
• Static Variables/Fields: Variables belonging to a class rather than a specific object of that class. All objects of the same class share the same static variable. They are initialized when the class is loaded and exist as a single instance.
• Static Methods: Methods belonging to a class rather than a specific object. They can be called directly through the class name without creating an instance. Static methods do not have access to non-static fields of the class, as they are not tied to a specific instance.
• Static Code Analysis: Analyzing the source code of a program without executing it. It is used to identify potential errors, vulnerabilities, or violations of coding standards early in the development process.

In the context of QA, static code analysis and testing are important parts of the process, helping to improve quality before the dynamic testing and execution phase.

Example of a static field and method in Java:

class Counter {
    static int count = 0; // Static field

    Counter() {
        count++;
    }

    static void displayCount() { // Static method
        System.out.println("Number of instances: " + count);
    }
}

// Usage
// Counter obj1 = new Counter();
// Counter obj2 = new Counter();
// Counter.displayCount(); // Calling static method via class name