Author: Luca Zanini

  • Project Euler – Problem 9

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    Luca Zanini
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    From the Project Euler Problem 9: A Pythagorean triplet is a set of three natural numbers, a b c, for which, a2 + b2 = c2 For example, 32 + 42 = 9 + 16 = 25 = 52. There exists exactly one Pythagorean triplet for which a + b + c = 1000. Find…

  • Project Euler – Problem 8

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    Luca Zanini
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    From the Project Euler Problem 8:Find the greatest product of five consecutive digits in the 1000-digit number. 7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450 checked I wrote the digits in a file, I read the file and I set an ArrayList<Character>…

  • Unexpected value from nativeGetEnabledTags: 0

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    Luca Zanini
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    From the release Android SDK Tools 21 a warning fills the logcat: Unexpected value from nativeGetEnabledTags: 0 I hope it will be fixed in the next release, waiting a solution I found this workaround.

  • Buttons for a view in a Custom Control

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    Luca Zanini
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    There are standard buttons that are often added to a view that perform the basic functions (new, delete, refresh) that usually you put in a view. The code in this post is a Custom Control you can add to a XPage bound to a lotus view to insert the buttons New, Delete and Refresh. This…

  • List of the sensors in an Android device

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    Luca Zanini
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    This is a simple app that displays all the sensors in the phone reporting the following characteristics: Name: name of the sensor Version: version of the sensor’s module Vendor: vendor of this sensor Type: type of this sensor Max Range: maximum range of the sensor Resolution: resolution of the sensor Min Delay: minimum delay allowed…

  • Project Euler – Problem 7

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    Luca Zanini
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    From the Project Euler Problem 7:By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.What is the 10001st prime number? checked used the code for problem 3.

  • Project Euler – Problem 6

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    Luca Zanini
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    From the Project Euler Problem 6: The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + … + 10^2 = 385 The square of the sum of the first ten natural numbers is, (1 + 2 + … + 10)^2 = 55^2 = 3025 Hence the difference between the…

  • 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.…