code: @Test public void test_windowAbsolutePathBeginWithSlashIsValid() throws Exception {
    final String osProperty=System.getProperties().getProperty("os.name");
    if (!osProperty.toLowerCase().contains("windows"))   return;
    System.out.println("Test Windows valid path string.");
    File f0=new File("C:/Windows");
    File f1=new File("/C:/Windows");
    File f2=new File("C:\\Windows");
    File f3=new File("/C:\\Windows");
    File f4=new File("\\C:\\Windows");
    assertEquals(f0,f1);
    assertEquals(f0,f2);
    assertEquals(f0,f3);
    assertEquals(f0,f4);
  }
  