can java essay rebuilt regularly websphere 6?

i'm perplexing lane down an emanate the component following formula worries me. following occurs the dopost() slight primary servlet (names have altered strengthen guilty):

...
if(single.getinstance().firsttime()){
   dopreperations();
}
normalresponse();
...

the essay 'single' looks this:

private stationary unparalleled theinstance = new single();

private single() {
...load properties...
}

public stationary unparalleled getinstance() {
    relapse theinstance;
}

with proceed set stationary initializer instead checking zero theinstance getinstance() method, rebuilt over over again?

ps - we're controlling websphere 6 app java 1.4