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Java Array Lists Code Examples

Last Updated on Wednesday 5th Oct 2022

Java Arrays Lists Code Examples using Iterators, Using for loop, Deleting an Element from List, Removing an Element from a List, Swap a Elements in a List...

			
					import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

			
	

Using Iterator

			
					public class Main {
    public static void main(String[] args) {
        List < String > names = new ArrayList < String > ();

        names.add("Liam");
        names.add("Noah");
        names.add("Oliver");

        System.out.println("Using Iterator");
        Iterator < String > str = names.iterator();

        while (str.hasNext()) {
            System.out.println(str.next());
        }
    }
}

			
	
			
					// Using Iterator
// Liam
// Noah
// Oliver

			
	

Using For Loop

			
					public class Main {
    public static void main(String[] args) {
        List < String > names = new ArrayList < String > ();

        names.add("Liam");
        names.add("Noah");
        names.add("Oliver");

        System.out.println("Using forLoop");
        int x = names.size();

        for(int i = 0 ; i < x ; i++){
            System.out.println(names.get(i));
        }
    }
}

			
	
			
					// Using forLoop
// Liam
// Noah
// Oliver

			
	

Copying to a new List

			
					public class Main {
    public static void main(String[] args) {
        List < String > names = new ArrayList < String > ();

        names.add("Liam");
        names.add("Noah");
        names.add("Oliver");

        ArrayList<String> newList = new ArrayList<String>(names);

        //after copyling

        System.out.println("Copying " + newList);

    }
}

			
	
			
					// Copying [Liam, Noah, Oliver]

			
	

Deleting an element from a list

			
					public class Main {
    public static void main(String[] args) {
        List < String > names = new ArrayList < String > ();

        names.add("Liam");
        names.add("Noah");
        names.add("Oliver");

        names.remove(1);
        names.remove("Noah");

        System.out.println(names);

    }
}

			
	
			
					// [Liam, Oliver]

			
	

Reverse Elements in List

			
					public class Main {
    public static void main(String[] args) {
        List < String > names = new ArrayList < String > ();

        names.add("Liam");
        names.add("Noah");
        names.add("Oliver");

        Collections.reverse(names);
        System.out.println(names);

    }
}

			
	
			
					// [Oliver, Noah, Liam]

			
	

Shuffles a Elements in List

			
					public class Main {
    public static void main(String[] args) {
        List < String > names = new ArrayList < String > ();

        names.add("Liam");
        names.add("Noah");
        names.add("Oliver");

        Collections.shuffle(names);
        System.out.println(names);

    }
}

			
	
			
					// [Liam, Oliver, Noah]

			
	

Swap Elements in List

			
					public class Main {
    public static void main(String[] args) {
        List < String > names = new ArrayList < String > ();

        names.add("Liam");
        names.add("Noah");
        names.add("Oliver");

        Collections.swap(names, 1, 2);
        System.out.println(names);

    }
}

			
	
			
					// [Liam, Oliver, Noah]