Question

Boot into your Linux partition (or open Linux in a VirtualBox VM). You will create a new directory in your home directory called csci2020u/lab02. We’ll add this folder to the Git repositories. Use the following steps to complete this lab:

1. Change into the csci2020u directory

2. Make a new directory, called lab02

3. Add the lab02 directory to Git

4. In the lab02 directory, create the directory structure used by Gradle (the files will be initially empty, you can create them with the touch command):

lab02 → build.gradle → src     → main    → java       → csci2020u      → lab02    → SimpleTest.java

5. Modify the build.gradle file to allow compilation and running of a Java program

6. Create a .gitignore file to ignore files that are normally not committed to a repository (e.g. .class files)

7. View all of the available Gradle tasks added as a result of the change

8. Add some code to the SimpleTest.java file; a simple hello world will suffice, but be sure that the package name matches the directory structure

9. Compile the code

10. Run the code by hand by changing to the build directory and using the java command

11. Commit changes locally, and push all changes to the remote repository

Answer 1

Create directory structure: csci2020u/lab02

1. mkdir ~/csci2020u/lab02

2. cd ~/csci2020u/lab02

3. git init

4. mkdir -p src/main/java/csci2020u/lab02

5. touch build.gradle

6. add following line into build.gradle file apply plugin: 'java'

7. Modifying build. gradle file to support compilation and running of java project

8. create .gitignore file

Sample .gitignore file:

# Java build artifacts class files

*.class

#other folders

bin/

build/

gen/

#OSX files

.DS_Store

9. View all gradle tasks by simply running the following command in lab02 directory

gradle tasks

10. Add the file SimpleTest.java in folder ~/cssi202u/lab02/src/main/java/csci2020u/lab02 and add code to SimpleTest.java

SimpleTest.java:

package csci2020u.lab02;

import java.io.*;

import java.util.*;

public class SimpleTest{

public static void main(String[] args){

/*Print Hello World*/

System.out.println("Hello World!");

}

}

11. add build file in ~/cssi202u/lab02 (this is known as build directory)

vi build.gradle

add following lines to build.gradle

apply plugin: 'java'

apply plugin: 'application'

mainClassName = 'csci202u.lab02.SimpleTest'

12. Compile the code using this command in build directory

gradle build

13. Run the code using command

gradle run

14. You should following output:

$gradle build BUILD SUCCESSFUL in 0s 5 actionable tasks: 4 executed, 1 up-to-date $gradle run Task :run Hello World! BUILD SUCCESSFUL in 0s 2 actionable tasks: 1 executed, 1 up-to-date

15. Add the files to staging area

git add *

16. Commit the files locally

git commit -m "initial commit"

17. Push the code changes to remote repository

git push origin master