Question

Java

1.Write a method removeEvenLength that takes an ArrayList of Strings as a parameter and that removes all of the strings of even length from the list.

2. Given the following Vehicle interface and client program in the Car class:

public interface Vehicle{

public void move();

}

public class Car implements Vehicle{

public static void main(String args[])

Vehicle v = new Vehicle(); // vehicle declaration

}

The above declaration is valid? True or False?

3. Java permits a class to implement only one interface? True or false

4. The Comparable interface enables the comparison of objects in Java? True or false

Answer 1

Answer 1:

import java.util.ArrayList;

public class TestRemoveEvenLength {
        public static void main(String[] args) {
                ArrayList<String>list = new ArrayList<>();
                list.add("Uday");
                list.add("Remove");
                list.add("ABC");
                list.add("Test");
                list.add("Testw");
                
                System.out.println(list);
                removeEvenLength(list);
                System.out.println(list);
        }

        private static void removeEvenLength(ArrayList<String> list) {
                ArrayList<String>res = new ArrayList<>();
                for(String x:list) {
                        if(x.length() % 2 == 0)
                                res.add(x);
                }
                list.removeAll(res);
                
        }
}

Answer 2:

The above declaration is valid? False
as we missed overriding the move in Car
Java permits a class to implement only one interface? false

we can implement any number of interface

The Comparable interface enables the comparison of objects in Java?
True

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