Find loopback address - full lambda

FullLambdaLoopbackAddresses.java

package org.example;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Collections;
import java.util.List;
import java.util.function.Predicate;

public class FullLambdaLoopbackAddresses {

    public static void main(final String[] args) {
        try {
            final Predicate<NetworkInterface> isLoopback = iface -> {
                try {
                    return iface.isLoopback();
                } catch (final SocketException e) {
                    return false;
                }
            };

            final List<String> loopbackAddresses = Collections
                    .list(NetworkInterface.getNetworkInterfaces())
                    .stream()
                    .filter(isLoopback)
                    .flatMap(networkInterface -> Collections
                            .list(networkInterface.getInetAddresses())
                            .stream()
                            .map(InetAddress::getHostAddress))
                    .toList();

            loopbackAddresses.forEach(System.out::println);

        } catch (final SocketException e) {
            throw new RuntimeException("Failed to access network interfaces", e);
        }
    }
}