Interfaces in Java

In Java, an interface is a type that defines a contract of methods that a class implementing the interface must provide. Here are some key points about interfaces in Java:

• Declaration: You declare an interface using the interface keyword, followed by the interface name and a list of method signatures. For example:

public interface MyInterface {
    void method1();
    int method2(String str);
}

• Methods: In an interface, methods are declared without a body. Classes that implement the interface must provide the actual method implementations.
• Implementing Interfaces: To implement an interface, a class uses the implements keyword. For example:

public class MyClass implements MyInterface {
    // Implement the methods defined in MyInterface
    @Override
    public void method1() {
        // Method implementation
    }
    
    @Override
    public int method2(String str) {
        // Method implementation
        return str.length();
    }
}

• Multiple Interfaces: A class can implement multiple interfaces, allowing it to inherit method contracts from each interface.
• Default Methods (Java 8+): Starting from Java 8, interfaces can have default methods with method bodies. These methods provide a default implementation that can be overridden by implementing classes if…