interface java définition

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.

public interface Exampleinterface { public void menthod1(); public int method2(); } class ExampleInterfaceImpl implements ExampleInterface { public void method1() { //code here } public int method2() { //code here } }

java interface

class ACMEBicycle implements Bicycle {

    int cadence = 0;
    int speed = 0;
    int gear = 1;

   // The compiler will now require that methods
   // changeCadence, changeGear, speedUp, and applyBrakes
   // all be implemented. Compilation will fail if those
   // methods are missing from this class.

    void changeCadence(int newValue) {
         cadence = newValue;
    }

    void changeGear(int newValue) {
         gear = newValue;
    }

    void speedUp(int increment) {
         speed = speed + increment;   
    }

    void applyBrakes(int decrement) {
         speed = speed - decrement;
    }

    void printStates() {
         System.out.println("cadence:" +
             cadence + " speed:" + 
             speed + " gear:" + gear);
    }
}

Posted by: Guest on July-19-2021

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// Assume we have the simple interface: interface Appendable { void append(string content); } // We can implement it like that: class SimplePrinter implements Appendable { public void append(string content) { System.out.println(content); } } // ... and maybe like that: class FileWriter implements Appendable { public void append(string content) { // Appends content into a file } } // Both classes are Appendable. 0 how to implement a interface in java

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