Experience accumulation (continuously updated)

StringfieldEditor for password display:
http://stackoverflow.com/questions/15986262/eclipse-field-editor-for-password
email address verification:
http://stackoverflow.com/questions/624581/what-is-the-best -java-email-address-validation-method
removes some default perspectives in rcp:
http://commercialjavaproducts.blogspot.jp/2011/07/remove-unwanted-perspectives-from-your.html