Author: Luca Zanini

  • Creating a singleton in java

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    Luca Zanini
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    In this post I explain how to create only one object of a java class, then a single instance is available in the application. An object of this type is called singleton and a starting class can be the following:

  • Project Euler – Problem 5

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    Luca Zanini
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    From the Project Euler Problem 5: 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? checked It ‘s the least common multiple of the…

  • Buttons for a form in a Custom Control

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    Luca Zanini
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    There are standard buttons that are often added to a form that perform the basic functions (edit, save, close) that usually you put in a form. The code in this post is a Custom Control that you can add to a XPage connected to a lotus form to place the buttons Edit, Save and Close.…

  • MessageSource in Spring 3

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    Luca Zanini
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    The MessageSource interface supports the parameterization and internationalization of messages and provides 2 implementations: ResourceBundleMessageSource, built on top of the standard ResourceBundle ReloadableResourceBundleMessageSource, being able to reload message definitions without restarting the VM The following is an example of ResourceBundleMessageSource to get messages in the specified language in Spring 3.

  • Project Euler – Problem 4

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    Luca Zanini
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    From the Project Euler Problem 4: A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 * 99. Find the largest palindrome made from the product of two 3-digit numbers checked

  • Device Definitions in Android SDK Tools Rev.21

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    Luca Zanini
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    In the last release of Android SDK Tools Rev.21 I found a nice surprise: now there are some device and configurations for the emulator.

  • Saving the position of a ScrollView inside a Fragment

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    Luca Zanini
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    I thought of writing a post about how to save the position of a ScrollView when I read the Bhavin’s comment in the post Tab Layout in Android with ActionBar and Fragment. Bhavin asked how one could restore the position of a scrollview switching between a tab and the other.

  • Exporting a lotus view to excel

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    Luca Zanini
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    In this post I explain how to export all the documents in a view of a lotus database to an excel spreadsheet using the library Apache POI. It is a very simple example that exports the string for each column in the view for every document, but you can add other features such as the…

  • Project Euler – Problem 3

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    Luca Zanini
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    From the Project Euler Problem 3: The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143 ? checked I used the Sieve of Eratosthenes and an idea to know if a prime factor was the greatest without checking all the numbers until 600851475143.

  • @Autowired and @Resource in Spring

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    Luca Zanini
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    The @Autowired annotation is used to configure the dependency injection in Spring and is associated with a setter method, or a field or a constructor of a class. In the case of a setter method or a field the bean used for dependency injection is chosen depending on the type.