Java - 줄바꿈(개행), OS에 맞게 처리하는 방법

// Windows
System.out.println("Hello\r\nWorld");

// Linux
System.out.println("Hello\nWorld");

System.out.println("Hello" + System.lineSeparator() + "World");

Hello
World

public final class System {
    /**
     * Returns the system-dependent line separator string.  It always
     * returns the same value - the initial value of the {@linkplain
     * #getProperty(String) system property} {@code line.separator}.
     *
     * <p>On UNIX systems, it returns {@code "\n"}; on Microsoft
     * Windows systems it returns {@code "\r\n"}.
     *
     * @return the system-dependent line separator string
     * @since 1.7
     */
    public static String lineSeparator() {
        return lineSeparator;
    }
}

String newline = System.getProperty("line.separator");
System.out.println("Hello" + newline + "World");

Hello
World

System.out.print(String.format("%s%n%s", "Hello", "World"));

Hello
World