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Sample Gradle Project

This repo contains the basic files you need to build your Java code on Linux/Mac/Windows using a Gradle. If you don't know what Gradle is, it is basically a way to build your code on Linux/Mac/Windows easily. I prefer it over Ant or Maven for building Java code because you do NOT need to install Gradle in order to use it because you download a wrapper. This greatly simplifies the install process. As an example I have implemented a queue with a single test file to show how you want to organize your files. I have also added a Main.java class for you to run your application. For larger Java projects take a look at the build.gradle file and file structure at this open source brain project: https://github.com/WalnutiQ/WalnutiQ

How to run tests through command line in Linux/Mac/Windows with Gradle

  1. Make sure you have java version 1.6, 1.7 or 1.8. To check open up a new terminal and type:

    prompt> java -version
    

    If you don't have any of the above, install java 1.7 by going here. After installing java 1.7 open up a new terminal to check if java 1.7 is installed by retyping java -version in the terminal.

  2. To run all tests in the Linux or Mac terminal type:

    prompt/SampleGradleProject> ./gradlew clean # cleans old compiled code
    prompt/SampleGradleProject> ./gradlew test
    
  3. To run all tests in the Windows command prompt type:

    prompt/SampleGradleProject> gradlew.bat clean 
    prompt/SampleGradleProject> gradlew.bat test
    

How to run Main.java through command line in Linux/Mac/Windows with Gradle

  1. First make sure the above instructions work.

  2. Then on Linux or Mac terminal type:

    prompt/SampleGradleProject> ./gradlew run
    Yo what's up human! Oh you think you're fancy
    
  3. And for Windows command prompt type:

    prompt/SampleGradleProject> gradlew.bat run
    Yo what's up human! Oh you think you're fancy
    

Queue Implementation strategy

The Queue.java class is in src/main/java/Queue.java
The QueueTest.java class is in src/test/java/QueueTest.java

To optimize for algorithmic runtime, memory usage, and memory throughput. I have implemented the bounded queue as an array based circular queue.

By implementing the queue as drifting within a circular array both the enqueue() and dequeue() methods will have O(1) or constant runtime.

Additionally an array based implementation of a Queue has been used over a linked list implementation of a Queue to optimize memory usage. Since the Queue will be holding small elements(4 byte integers) and the constructor requires a size we can assume the purpose of this bounded Queue is to store a known max size of integers. By not using the pointers used in a linked list Queue this array based Queue is more space efficient if the maxSize of the Queue is known initially.

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