While creating threads I see code like:-
Runnable watdaheck = new Runnable()
{
System.out.println("java with time contradicts itself");
}
From what I know an interface cannot be instantiated so I fail to understand how we can write Runnable() for creating anonymous class. An interface can be given a reference but cannot be instantiated is what we are taught in polymorphism.
Runnable is interface, you are creating an anonymous class which implements the Runnable interface.
I just modify a bit your code.
Runnable watdaheck = new Runnable()
{
public void run(){
System.out.println("java with time contradicts itself");
}
}
The right part
new Runnable()
{
public void run(){
System.out.println("java with time contradicts itself");
}
}
is an instance of an anonymous class that implements interface Runnable
The left part Runnable watdaheck, watdaheck is a reference that refers to above object.
Your code is same with below code:
class SubRunnable implements Runnable{
public void run(){
//do something
}
}
Runnable r = new SubRunnable();
You should read more about anonymous class in Java. https://docs.oracle.com/javase/tutorial/java/javaOO/anonymousclasses.html
Runnable is an interface. We use it with the "new" operator in order to create an anonymous class object whICH
