Tutorial: Moodle VPL -- A Java Hello World Program

--D. Thiebaut (talk) 10:17, 13 June 2014 (EDT)

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Moodle VPL Tutorials

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This tutorial builds on the first one in the series, which should be done first, as the present tutorial skips some steps. This tutorial generates a VPL activity that automatically grades a Java program that prints a "Hello World" message on the screen.

Setup

• Moodle Version 2.7 + (Build: 20140529)
• VPL Version 3.0.1
• For details on how Moodle and VPL were installed, go to this page.

VPL Activity Description

Hello World

Due date: Tuesday, 21 June 2016, 8:00 PM
Requested files: HelloWorld.java (Download)
Type of work: Individual work
Grade settings: Maximum grade: 100
Run: Yes Evaluate: Yes
Automatic grade: Yes
Just a simple Hello World in Java

Requested files

HelloWorld.java

// put your code here.
// Make sure that your program does not add extra \n at the end of the output!

Execution files

vpl_run.sh

#! /bin/bash
 
cat > vpl_execution << 'EOF'
#! /bin/bash
javac -J-Xmx128m HelloWorld.java 
java HelloWorld
 
EOF
 
chmod +x vpl_execution

vpl_debug.sh

No file needed

vpl_evaluate.sh

No file needed

vpl_evaluate.cases

case = Test 1
output = Hello World
 
case = Test 2
output = "Hello, World
"

Testing

• Enter the following code in the Edit window of the Test activity area.

public class HelloWorld {

    public static void main(String[] args) {
        System.out.println("Hello, World\n");
    }

}

• Click on Save, then Run and verify that "Hello, World" appears in the terminal window.
• Click on Evaluate and verify that you get 100/100 for the 2 tests.

This concludes this tutorial