Can you explain the meaning and usage of the static keyword in Java?

In Java, the keyword static is used to indicate that a field, method, or nested class belongs to the class itself rather than to any specific instance of the class. This means that static members exist in a single copy and are accessible without creating an object.

Application of static:

• Static fields (variables) — shared among all instances of the class, for example, a counter for created objects.
• Static methods — can be called without creating an object, for example, Math.sqrt().
• Static blocks and nested classes — used for initialization and code organization.

Example:

public class Counter {
    private static int count = 0; // shared among all objects

    public Counter() {
        count++;
    }

    public static int getCount() {
        return count;
    }
}

// Usage:
System.out.println(Counter.getCount()); // call without creating an object
Counter c1 = new Counter();
Counter c2 = new Counter();
System.out.println(Counter.getCount()); // 2