Captcha

http://www.javacodegeeks.com/2010/06/add-captcha-gwt-application.html

GIT+Eclipse

http://wiki.eclipse.org/EGit/User_Guide/Remote#Repository_Selection
http://help.github.com/msysgit-key-setup/

Modificator for @Autowire

Is it the same?
@Autowired
public indentifier name
@Autowired
private indentifier name

1. Speed issuer. With a private modificator reflection algorith adds only one additional call which is nano seconds time.
name.setAccessible(true);
2. But with a private modificator you don't break object encapsulation

SLF4J

SLF4J-simple can't be configured via log4j.properties. To configure it use slf4j-log4j12

org.slf4j
slf4j-log4j12
1.5.8


WINDOW resize handler

public class XXX implements ResizeHandler{
public XXX(){
Window.addResizeHandler(this);
}

@Override
public void onResize(ResizeEvent event) {
//TODO YOUR CODE AFTER RESIZING
}

}

Date Formatter

Is the ParseException happens?

SimpleDateFormat df = new SimpleDateFormat("dd-MM-yyyy");
Date date = null;
try {
//1
date = df.parse("12-34-2007");
} catch (ParseException e) {
System.out.println("Wrong date");
}
System.out.println(date.toString());

Actually not. To prevent this add to //1
df.setLenient(false);

Letient parameter is true by default that's why to match format strictly need
setting parameter to false

Windows fonts

sudo apt-get install msttcorefonts