abstract class example in java
//abstract parent class
abstract class Animal{
//abstract method
public abstract void sound();
}
//Dog class extends Animal class
public class Dog extends Animal{
public void sound(){
System.out.println("Woof");
}
public static void main(String args[]){
Animal obj = new Dog();
obj.sound();
}
}Can you add a constructor to an abstract class
We can create constructor in abstract class , it does’nt give any compilation
error.abstract class java constructor
/**
* Simple Java program to prove that abstract class can have constructor in Java.
* @author http://java67.blogspot.com
*/
public class AbstractConstructorTest {
public static void main(String args[]) {
Server server = new Tomcat("Apache Tomcat");
server.start();
}
}
abstract class Server{
protected final String name;
public Server(String name){
this.name = name;
}
public abstract boolean start();
}
class Tomcat extends Server{
public Tomcat(String name){
super(name);
}
@Override
public boolean start() {
System.out.println( this.name + " started successfully");
return true;
}
}
Output:
Apache Tomcat started successfullyCopyright © 2021 Codeinu
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