Introduce Explaining Variable

If you have a complicated expression put them into temporary variables that explain what they do. This can help make code easier to read and understand.

if ( (platform.toUpperCase().indexOf("MAC") > -1) &&
(browser.toUpperCase().indexOf("IE") > -1) &&
wasInitialized() && resize > 0 )
{
  // do something
}

final boolean isMacOs     = platform.toUpperCase().indexOf("MAC") > -1;

final boolean isIEBrowser = browser.toUpperCase().indexOf("IE")  > -1;

final boolean wasResized  = resize > 0;


if (isMacOs && isIEBrowser && wasInitialized() && wasResized)
{
  // do something
}