Download file from URL using Java

jurl.java

import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;

public class jurl {
    public static void main(String[] args) throws MalformedURLException, IOException {
        String url = args[0];
        String filename = args[1];
        try (ReadableByteChannel readableByteChannel = Channels.newChannel(new URL(url).openStream());
                FileOutputStream fileOutputStream = new FileOutputStream(filename)) {
            FileChannel fileChannel = fileOutputStream.getChannel();
            fileChannel.transferFrom(readableByteChannel, 0, Long.MAX_VALUE);
        }
    }
}

Poormans replacement of curl on systems that do not have it but have Java (e.g. z/OS on IBM mainframes).

Usage:

javac jurl.java
java jurl <url> <filename>