why use interface in java code example
Example 1: Interface in java
interface Vehicle
{
public void accelerate();
}
class BMW implements Vehicle
{
public void accelerate()
{
System.out.println("BMW accelerating...");
}
}
public class InterfaceDemo
{
public static void main(String[] args)
{
BMW obj = new BMW();
obj.accelerate();
}
}
Example 2: java implement interface
interface Appendable {
void append(string content);
}
class SimplePrinter implements Appendable {
public void append(string content) {
System.out.println(content);
}
}
class FileWriter implements Appendable {
public void append(string content) {
}
}
Example 3: interface in java
Interfaces specify what a class must do.
It is the blueprint of the class.
It is used to achieve total abstraction.
We are using implements keyword for interface.
Basic statement we all know in Selenium is
WebDriver driver = new FirefoxDriver();
WebDriver itself is an Interface.
So we are initializing Firefox browser
using Selenium WebDriver.
It means we are creating a reference variable
of the interface and creating an Object.
So WebDriver is an Interface and
FirefoxDriver is a class.
Example 4: why we use interface in java
interface Animal {
void child();
}
class Cat implements Animal {
public void child() {
System.out.println("kitten");
}
}
class Dog implements Animal {
public void child() {
System.out.println("puppy");
}
}
public class LooseCoupling{
public static void main(String args[]) {
Animal obj = new Cat();
obj.child();
}
}
Example 5: java interface
public interface Exampleinterface {
public void menthod1();
public int method2();
}
class ExampleInterfaceImpl implements ExampleInterface {
public void method1()
{
}
public int method2()
{
}
}
Example 6: where do you use interface in framework
Interfaces specify what a class must do.
It is the blueprint of the class.
It is used to achieve total abstraction.
We are using implements keyword for interface.
Basic statement we all know in Selenium is
WebDriver driver = new FirefoxDriver();
WebDriver itself is an Interface.
So we are initializing Firefox browser
using Selenium WebDriver.
It means we are creating a reference variable
of the interface and creating an Object.
So WebDriver is an Interface and
FirefoxDriver is a class.