How to Convert a List of Strings to a List of Integers in Java - Step by Step Examples

How to Convert a List of Strings to a List of Integers in Java ?

Answer

To convert a list of strings to a list of integers in Java, you can use a loop to iterate over each string and parse it to an integer using the Integer.parseInt() method.

✐ Examples

1 Convert List of Strings to List of Integers

In this example,

We have a list of strings named stringList.
We iterate over each string in the list and parse it to an integer using the Integer.parseInt() method.
We add each integer to a new list of integers.

Java Program

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> stringList = List.of("1", "2", "3", "4", "5");
        List<Integer> intList = new ArrayList<>();
        for (String str : stringList) {
            intList.add(Integer.parseInt(str));
        }
        System.out.println("List of integers: " + intList);
    }
}

Output

List of integers: [1, 2, 3, 4, 5]

Summary

In this tutorial, we learned How to Convert a List of Strings to a List of Integers in Java language with well detailed examples.

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