Identification canonical tag is correct tag

Below program identify the canonical tag and open it the canonical url in new window and verified it is correct url



int result =0;
String url = selenium.getLocation();
if (selenium.isElementPresent("//link[@rel='canonical' and @href='" + (url) + "']"))
{
//System.out.println("Canonical tag present : " + selenium.getText("//link[@rel='canonical']"));
System.out.println("Canonical tag present : " + url);
selenium.openWindow(url, "url");
selenium.selectWindow(url);
for (int second = 0;; second++) {
if (second >= 60) fail("timeout");
try { if (selenium.getHtmlSource().matches("^[\\s\\S]*404[\\s\\S]*$"))
System.out.println("Canonical tag is wrongly , gives 404 error for url"+url);
break; }
catch (Exception e) {
System.out.println("Canonical tag is correctly put");
};
Thread.sleep(1000);