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Part 12
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‎Part-12/part12-Part12_08.Lottery/.tmcproject.yml

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force_new_sandbox: true

‎Part-12/part12-Part12_08.Lottery/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
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http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>tkt</groupId>
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<artifactId>Part12_08.Lottery</artifactId>
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<name>Part12_08.Lottery</name>
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<version>1.0-SNAPSHOT</version>
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<packaging>jar</packaging>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>fi.helsinki.cs.tmc</groupId>
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<artifactId>edu-test-utils</artifactId>
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<version>0.4.2</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.0</version>
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</plugin>
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<plugin>
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<groupId>org.codehaus.mojo</groupId>
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<artifactId>exec-maven-plugin</artifactId>
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<version>1.6.0</version>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.22.1</version>
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<configuration>
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<argLine>-Djdk.net.URLClassPath.disableClassPathURLCheck=true</argLine>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<repositories>
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<repository>
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<id>tmc</id>
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<name>TMC repo</name>
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<url>https://maven.mooc.fi/releases</url>
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<releases>
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<enabled>true</enabled>
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</releases>
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<snapshots>
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<enabled>true</enabled>
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</snapshots>
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</repository>
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</repositories>
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<pluginRepositories>
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<pluginRepository>
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<id>tmc</id>
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<name>TMC repo</name>
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<url>https://maven.mooc.fi/releases</url>
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<releases>
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<enabled>true</enabled>
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</releases>
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<snapshots>
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<enabled>true</enabled>
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</snapshots>
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</pluginRepository>
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</pluginRepositories>
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</project>

‎Part-12/part12-Part12_08.Lottery/src/main/java/LotteryRow.java

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import java.util.ArrayList;
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import java.util.Random;
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public class LotteryRow {
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private Random random;
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private ArrayList<Integer> numbers;
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public LotteryRow() {
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// Draw the numbers when the LotteryRow is created
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this.randomizeNumbers();
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}
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public ArrayList<Integer> numbers() {
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return this.numbers;
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}
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public void randomizeNumbers() {
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// Initialize the list for numbers
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this.numbers = new ArrayList<>();
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// Implement the random number generation here
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// the method containsNumber is probably useful
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this.random = new Random();
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for (int i = 0; i < 7; i++) {
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int randomNum = this.random.nextInt(40) + 1;
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if (containsNumber(randomNum)) {
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i--;
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continue;
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}
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this.numbers.add(randomNum);
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}
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}
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public boolean containsNumber(int number) {
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// Check here whether the number is among the drawn numbers
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return this.numbers.contains(number);
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}
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}

‎Part-12/part12-Part12_08.Lottery/src/main/java/Program.java

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import java.util.ArrayList;
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public class Program {
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public static void main(String[] args) {
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LotteryRow row = new LotteryRow();
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ArrayList<Integer> lotteryNumbers = row.numbers();
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System.out.println("Lottery numbers:");
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for (Integer number : lotteryNumbers) {
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System.out.print(number + " ");
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}
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System.out.println("");
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}
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}
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‎Part-12/part12-Part12_08.Lottery/src/test/java/LotteryRowTest.java

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import fi.helsinki.cs.tmc.edutestutils.Points;
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import static org.junit.Assert.*;
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import org.junit.Test;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.Set;
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@Points("12-08")
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public class LotteryRowTest {
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public ArrayList<Integer> test() {
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LotteryRow row;
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ArrayList<Integer> numbers;
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try {
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row = new LotteryRow();
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numbers = row.numbers();
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} catch (Throwable t) {
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fail("Something went wrong when creating a new LotteryRow object! More information: " + t);
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return new ArrayList<>();
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}
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assertEquals("The total number of returned lottery numbers should be 7!", 7, numbers.size());
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Set<Integer> remainingNumbers = new HashSet<>();
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for (int i = 1; i <= 40; i++) {
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remainingNumbers.add(i);
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}
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Set<Integer> drawnNumbers = new HashSet<>();
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for (int i : numbers) {
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assertTrue("Each lottery number should be in the range 1-40. However, you returned: " + i,
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(i >= 1 && i <= 40));
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assertTrue("The method 'containsNumber' returns the value false even though the number was in the list of drawn numbers: " + i,
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row.containsNumber(i));
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assertTrue("LotteryRow contains the same number multiple times: " + i,
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drawnNumbers.add(i));
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remainingNumbers.remove(i);
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}
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for (int i : remainingNumbers) {
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assertFalse("The method 'containsNumber' returns the value true even though the number is not included in the list of drawn numbers: " + i,
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row.containsNumber(i));
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}
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return numbers;
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}
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@Test
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public void testOneRandomization() {
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test();
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}
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@Test
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public void testRandomizeNumbersRandomizesNewNumbers() {
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String error = "When the following code was executed:\n LotteryRow lotteryRow = new LotteryRow();\nSystem.out.println(lotteryRow.numbers());\nlotteryRow.randomizeNumbers();\nSystem.out.println(lotteryRow.numbers());\n";
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LotteryRow row;
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ArrayList<Integer> numbers;
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try {
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row = new LotteryRow();
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numbers = row.numbers();
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} catch (Throwable t) {
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fail("Something went wrong when creating a new LotteryRow object! More information: " + t);
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return;
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}
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String numbersString = numbers.toString();
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assertEquals("The total number of returned lottery numbers should be 7!", 7, numbers.size());
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row.randomizeNumbers();
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assertTrue(error + "The total number of returned lottery numbers should be 7. Now it was " + row.numbers().size(), 7 == row.numbers().size());
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assertFalse(error + "Your program drew the same numbers again. Quite unlikely!", numbersString.equals(row.numbers().toString()));
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}
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@Test
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public void testMultipleRandomizations() {
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int[] arr = new int[41];
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for (int i = 0; i < 200; i++) {
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for (int x : test()) {
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arr[x]++;
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}
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}
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int howMany = 0;
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for (int i = 1; i <= 40; i++) {
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if (arr[i] > 0) {
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howMany++;
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}
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}
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assertEquals("200 lottery rows generated only " + howMany
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+ " different numbers! Not very random!", 40, howMany);
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}
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}

‎Part-12/part12-Part12_08.Lottery/target/classes/LotteryRow.class

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‎Part-12/part12-Part12_08.Lottery/target/classes/Program.class

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‎Part-12/part12-Part12_08.Lottery/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

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LotteryRow.class
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Program.class

‎Part-12/part12-Part12_08.Lottery/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst

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D:\00Codes\Java\mooc-java-programming-ii\part12-Part12_08.Lottery\src\main\java\Program.java
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D:\00Codes\Java\mooc-java-programming-ii\part12-Part12_08.Lottery\src\main\java\LotteryRow.java

‎Part-12/part12-Part12_08.Lottery/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst

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LotteryRowTest.class

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