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/**
 * The first commented line is your dabblet’s title
 */

background: #f06;
background: linear-gradient(45deg, #f06, yellow);
min-height: 100%;
border:1px;

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Source : https://developers.google.com/web-toolkit/doc/latest/DevGuideCompilingAndDebugging

java -cp gwt-dev.jar com.google.gwt.dev.Compiler
Missing required argument 'module[s]'
Google Web Toolkit 2.3.0
Compiler [-logLevel level] [-workDir dir] [-gen dir] [-style style] [-ea] [-XdisableClassMetadata] [-XdisableCastChecking] [-validateOnly] [-draftCompile] [-optimize level] [-compileReport] [-strict] [-localWorkers count] [-war dir] [-deploy dir] [-extra dir] module[s] 

where 
  -logLevel               The level of logging detail: ERROR, WARN, INFO, TRACE, DEBUG, SPAM, or ALL
  -workDir                The compiler's working directory for internal use (must be writeable; defaults to a system temp dir)

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$ java -cp gwt-dev.jar com.google.gwt.dev.HostedMode
Missing required argument 'module[s]'
Google Web Toolkit 2.3.0
DevMode [-noserver] [-port port-number | "auto"] [-whitelist whitelist-string] [-blacklist blacklist-string] [-logdir directory] [-logLevel level] [-gen dir] [-bindAddress host-name-or-address] [-codeServerPort port-number | "auto"] [-server servletContainerLauncher[:args]] [-startupUrl url] [-war dir] [-deploy dir] [-extra dir] [-workDir dir] module[s] 

where 
  -noserver        Prevents the embedded web server from running
  -port            Specifies the TCP port for the embedded web server (defaults to 8888)
  -whitelist       Allows the user to browse URLs that match the specified regexes (comma or space separated)
  -blacklist       Prevents the user browsing URLs that match the specified regexes (comma or space separated)

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package test;

public class RunOutOfMemory {

/**
* Results
*
* ==== Environment: 32bit Win 7, 2GB RAM, Java 7 ====
*
* Reducing the default maximum thread stack size allows more of the process' virtual

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Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

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	private String xmlToString(InputStream inputStream) {
		try {
			DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
			org.w3c.dom.Document doc = documentBuilderFactory.newDocumentBuilder().parse(inputStream);
			StringWriter stw = new StringWriter();
			Transformer serializer = TransformerFactory.newInstance().newTransformer();
			serializer.transform(new DOMSource(doc), new StreamResult(stw));
			return stw.toString();
		} catch (Exception e) {
			throw new RuntimeException(e);

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<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
 
<web-app>
  <display-name>Servlet 2.3 Web Application</display-name>
</web-app>

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<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
	      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	      xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
	      http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
	      version="2.4">
<web-app>
  <display-name>Servlet 2.4 Web Application</display-name>
</web-app>

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<web-app xmlns="http://java.sun.com/xml/ns/javaee"
	      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	      http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	      version="2.5">
<web-app>
  <display-name>Servlet 2.5 Web Application</display-name>
</web-app>

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<web-app xmlns="http://java.sun.com/xml/ns/javaee"
	      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	      version="3.0">
<web-app>
  <display-name>Servlet 3.0 Web Application</display-name>
</web-app>