How to Iterate Over a List in Reverse Order in Java - Step by Step Examples

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How to Iterate Over a List in Reverse Order in Java ?

Answer

To iterate over a list in Java in reverse order, you can use the listIterator() method or a reverse for loop.

✐ Examples

1 Iterate Over List in Reverse Using ListIterator

In this example,

We create a list named numbers with integer elements.
We obtain a list iterator using the listIterator() method.
We use the hasPrevious() and previous() methods of the list iterator to iterate over the list in reverse order.
Within the loop, we perform operations on each element or print it.

Java Program

// Iterate over list in reverse using ListIterator
import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;

public class Main {
    public static void main(String[] args) {
        ArrayList<Integer> numbers = new ArrayList<>(List.of(1, 2, 3, 4, 5));
        ListIterator<Integer> iterator = numbers.listIterator(numbers.size());
        while (iterator.hasPrevious()) {
            System.out.println(iterator.previous());
        }
    }
}

Output

2 Iterate Over List in Reverse Using Reverse Loop

In this example,

We create a list named names with string elements.
We use a reverse for loop to iterate over the list in reverse order.
Within the loop, we perform operations on each element or print it.

Java Program

// Iterate over list in reverse using reverse loop
import java.util.ArrayList;
import java.util.List;
import java.util.Collections;

public class Main {
    public static void main(String[] args) {
        ArrayList<String> names = new ArrayList<>(List.of("Alice", "Bob", "Charlie", "David"));
        Collections.reverse(names);
        for (String name : names) {
            System.out.println(name);
        }
    }
}

Output

David
Charlie
Bob
Alice

Summary

In this tutorial, we learned How to Iterate Over a List in Reverse Order in Java language with well detailed examples.

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How to Iterate Over a List in Reverse Order in Java - Step by Step Examples

How to Iterate Over a List in Reverse Order in Java ?

Answer

✐ Examples

1 Iterate Over List in Reverse Using ListIterator

Java Program

Output

2 Iterate Over List in Reverse Using Reverse Loop

Java Program

Output

Summary

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