How to Filter Elements of an Array based on a Condition in Java - Step by Step Examples

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How to Filter Elements of an Array based on a Condition in Java ?

Answer

To filter elements of an array based on a condition in Java, you can use streams and the filter method.

✐ Examples

1 Filter Even Numbers

In this example,

We have an array named numbers containing integers.
We use streams and the filter method to filter out even numbers.
We collect the filtered elements into a new list.
We print the filtered list to demonstrate the filtering.

Java Program

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Integer[] numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
        List<Integer> evenNumbers = Arrays.stream(numbers)
                                          .filter(n -> n % 2 == 0)
                                          .collect(Collectors.toList());
        System.out.println("Even Numbers: " + evenNumbers);
    }
}

Output

Even Numbers: [2, 4, 6, 8, 10]

2 Filter Strings by Length

In this example,

We have an array named words containing strings.
We use streams and the filter method to filter strings by their length.
We collect the filtered elements into a new list.
We print the filtered list to demonstrate the filtering.

Java Program

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        String[] words = {"apple", "banana", "cherry", "date", "fig"};
        List<String> filteredWords = Arrays.stream(words)
                                          .filter(s -> s.length() > 5)
                                          .collect(Collectors.toList());
        System.out.println("Filtered Words: " + filteredWords);
    }
}

Output

Filtered Words: [banana, cherry]

Summary

In this tutorial, we learned How to Filter Elements of an Array based on a Condition in Java language with well detailed examples.

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How to Filter Elements of an Array based on a Condition in Java - Step by Step Examples

How to Filter Elements of an Array based on a Condition in Java ?

Answer

✐ Examples

1 Filter Even Numbers

Java Program

Output

2 Filter Strings by Length

Java Program

Output

Summary

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