Main.java

package net.wrap_trap.sample;

import java.io.*;
import java.nio.file.Files;

public class Main {
    public static void main(String[] args) throws IOException {
        if(args.length != 2) {
            System.err.println("remove-hardlink-test [source] [hardlink]");
            System.exit(-1);
        }
        File source = new File(args[0]);
        File hardLink = new File(args[1]);

        try(FileWriter fw = new FileWriter(source)) {
            fw.write("Hello World");
        }
        Files.createLink(hardLink.toPath(), source.toPath());
        try(BufferedReader fr = new BufferedReader(new FileReader(source))) {
            System.out.println("read: " + fr.readLine());
            System.out.println("hardLink#delete: " + hardLink.delete());
        }
    }
}

Run on Bash on Windows

masayuki@MASAYUKI-PC:/tmp$ /usr/lib/jvm/java-8-openjdk-amd64/bin/java -cp /mnt/d/development/repository/git/remove-hardlink-test/out/production/remove-hardlink-test net.wrap_trap.sample.Main hoge.txt hoge_link.txt
read: Hello World
hardLink#delete: true

Run on Cygwin

masayuki@masayuki-PC /cygdrive/d/development/repository/git/remove-hardlink-test/out/production/remove-hardlink-test
$ java -cp . net.wrap_trap.sample.Main hoge.txt hoge_link.txt
read: Hello World
hardLink#delete: false

Run on Linux

[masayuki@c793019b8fb5 work]$ java -cp . net.wrap_trap.sample.Main hoge.txt hoge_link.txt
read: Hello World
hardLink#delete: true

Run on Windows

D:\development\repository\git\remove-hardlink-test\out\production\remove-hardlink-test> java -cp . net.wrap_trap.sample.Main hoge.txt hoge_link.txt
read: Hello World
hardLink#delete: false