I have an old Samung phone to be used as a toy. After restoring back to factory image and power on, I was stuck at the activate service screen. Unfortunately, the four corner magic touch did not work. So I did quite a bit of digging and this is what worked on my Samsung Continuum: Press emergency call button, then at the dialer, press * # 8 3 7 8 6 6 3 3 , press the Home key From the home screen, tap phone icon, Dial * # 2 2 7 4 5 9 2 7 Enter SPC code: ______ displays tap in white box to show virtual keyboard, enter 6 digit code (default: 000000), tap OK Select “Hidden menu Enable”, tap OK From...

To inject ServletContext into a Spring bean: implement ServletContextAware : import javax.servlet.ServletContext; import... Define bean in Spring application context: <beans:bean id="myBean" class="com.example.M...

Scaling an image with default Java API loses quality (horribly!): public static BufferedImage resizeImage(Buffer... The imgscalr library does the job beautifully. And its' very easy to do: // import org.imgscalr.Scalr; public static... To import the library in Maven: <dependency> <groupId>org.imgscalr</groupId> ...

This is a utility to convert a byte array to hex string, and to convert a hex string back to the original. To convert a String to hex, you must call String.getBytes() first. The utility does not pretend to know your string encoding. public class StringHexUtil { public static ... This also works: String binaryToHex(byte[] data) { StringBui...

There are two steps to create a custom function for JSP: Declare the function in the TLD: <?xml version="1.0" encoding="UTF-8" ?> <taglib... Implement the function (must be static): package com.example; public class UrlTransl... To use the function: <%@ taglib uri="http://www.example.com/jsp/tags" p...

Step 1: create a Json factory: package com.my.service.dev; import java.io.... Step 2: use it: ObjectMapper mapper = new ObjectMapper(new AllowCo...

1. mvc:default-servlet-handler Configures a handler for serving static resources by forwarding to the Servlet container's default Servlet. Use of this handler allows using a "/" mapping with the DispatcherServlet while still utilizing the Servlet container to serve static resources. HandlerMapping: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Handler: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Attribute Description default-servlet-name The name of the default Servlet to forward to for static resource requests. The handler will try to auto-detect the container's default Servlet at startup time using a list of known names. If the default Servlet cannot be detected because of using an unknown container or because it has been manually configured, the servlet name must be set explicitly. 2. mvc:view-controller Defines a simple Controller that selects a view to render the response. HandlerMapping: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Handler: org.springframework.web.servlet.mvc.ParameterizableViewController Attribute Description...

To check password against login credential: // import org.springframework.security.authenticat... To replace authentication credentials with a new one: SecurityContext securityContext = SecurityContextH...

This example creates an instance of XMLGregorianCalendar and converts it to java.util.Date : import java.util.Date; import javax.xml.datatyp...

In the bean validation API javadoc, for every constraint annotation, there's a corresponding .List annotation. For example, for @NotNull , there's @NotNull.List , for which JavaDoc says: Defines several @NotNull annotations on the same element What would you accomplish with multiple @NotNull annotations that you cannot accomplish with one @NotNull ? This is a test to reveal some of the facts. Change the Person class to: package com.example; public class Person { ... Add another JUnit test ( src/test/com/example/TestPersonWithList.java ): package com.example; import java.util.Itera... As the test shows, a Person bean can never be valid because we are requiring that name must begin with Mr and Ms . One might think that the same can be accomplished by simply repeating the @Pattern annotation multiple times,...