How to Remove Element from Array based on a Condition in Java - Step by Step Examples

How to Remove Element from Array based on a Condition in Java ?

Answer

To remove an element from an array based on a condition in Java, you can use the `ArrayList` class and its `removeIf` method to remove elements that match the condition.

✐ Examples

1 Remove Integers Greater Than 5

In this example,

We create an ArrayList named `numbers` with elements including those to be removed based on the condition.
We use the `removeIf` method with a predicate to remove integers greater than 5.
Finally, we get an ArrayList with integers not greater than 5.

Java Program

// Remove Integers Greater Than 5
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = new ArrayList<>(List.of(1, 6, 2, 7, 3, 8, 4, 9, 5));
        numbers.removeIf(n -> n > 5);
        System.out.println("List after filtering: " + numbers);
    }
}

Output

List after filtering: [1, 2, 3, 4, 5]

2 Remove Strings Starting with 'A'

In this example,

We create an ArrayList named `words` with elements including those to be removed based on the condition.
We use the `removeIf` method with a predicate to remove strings starting with 'A'.
Finally, we get an ArrayList with strings not starting with 'A'.

Java Program

// Remove Strings Starting with 'A'
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> words = new ArrayList<>(List.of("Apple", "Banana", "Apricot", "Grape", "Mango"));
        words.removeIf(s -> s.startsWith("A"));
        System.out.println("List after filtering: " + words);
    }
}

Output

List after filtering: [Banana, Grape, Mango]

Summary

In this tutorial, we learned How to Remove Element from Array based on a Condition in Java language with well detailed examples.

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