java - Swiching window in HtmlUnit -

when using selenium on firefoxdriver switching windows using following code

final set<string> allwindowid = driver.getwindowhandles();         final iterator<string> itr = allwindowid.iterator();         while (itr.hasnext()) {             if (parentid == itr.next()) {                 parentid = itr.next();             }             else {                 childid = itr.next();             }         }         driver.switchto().window(childid); 

but same code not working when using htmlunitdriver. can ?

you comparing string references , not string values, use equals() instead of ==.

while (itr.hasnext()) {     if (parentid.equals(itr.next())) {          parentid = itr.next();        } else {         childid = itr.next();     } } driver.switchto().window(childid); 

for details: how compare strings in java?

also can re-write same method

while (itr.hasnext()) {     if (!parentid.equals(itr.next())) {          // no need reassign same value parentid           childid = itr.next();            } } driver.switchto().window(childid);