first commit with the assignment.

thirdlab/.editorconfig

+# Editor configuration, see http://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false
+
+[*.yml]
+indent_size = 2
+
+[*.sh]
+end_of_line = lf

thirdlab/.gitattributes

+# When shell scripts end in CRLF, bash gives a cryptic error message
+*.sh text eol=lf

thirdlab/.gitignore

+#
+# Standard Maven .gitignore
+#
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+
+#
+# IntelliJ
+#
+*.iml
+.idea/*
+!.idea/runConfigurations/
+
+#
+# Visual Studio Code
+#
+.settings/
+.classpath
+.project
+.vscode/

thirdlab/.gitlab-ci.yml

+before_script:
+  - apt-get -qq update
+  - apt-get -qq upgrade
+  - export BUILD_DIR=$PWD
+  - apt-get -qq install default-jre
+  - apt-get -qq install default-jdk
+  - java -version
+  - update-alternatives --config java
+  - apt-get -qq install wget
+  - cd /opt
+  - wget ftp://mirror.reverse.net/pub/apache/maven/maven-3/3.6.0/binaries/apache-maven-3.6.0-bin.tar.gz
+  - tar xvf apache-maven-3.6.0-bin.tar.gz
+  - export M2_HOME=/opt/apache-maven-3.6.0
+  - export M2=$M2_HOME/bin
+  - export PATH=$M2:$PATH
+  - cd $BUILD_DIR/thirdlab
+  - mvn -version
+maven_build:
+  script: mvn verify
\ No newline at end of file

thirdlab/.travis.yml

+language: java
+jdk: oraclejdk8
+after_success:
+- mvn coveralls:report

thirdlab/pom.xml

+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.ds.thirdlab</groupId>
+    <artifactId>thirdlab</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-checkstyle-plugin</artifactId>
+                    <version>3.0.0</version>
+                    <dependencies>
+                        <dependency>
+                            <groupId>com.puppycrawl.tools</groupId>
+                            <artifactId>checkstyle</artifactId>
+                            <version>8.10</version>
+                        </dependency>
+                        <dependency>
+                            <groupId>com.github.ngeor</groupId>
+                            <artifactId>checkstyle-rules</artifactId>
+                            <version>1.1.0</version>
+                        </dependency>
+                    </dependencies>
+                    <configuration>
+                        <configLocation>com/github/ngeor/checkstyle.xml</configLocation>
+                        <includeTestSourceDirectory>true</includeTestSourceDirectory>
+                    </configuration>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+            </plugin>
+
+            <!--
+                You can run jacoco in the default profile with:
+                mvn jacoco:prepare-agent test jacoco:report
+            -->
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>0.8.1</version>
+            </plugin>
+        </plugins>
+    </build>
+    <reporting>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.0.0</version>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <configuration>
+                    <configLocation>com/github/ngeor/checkstyle.xml</configLocation>
+                    <includeTestSourceDirectory>true</includeTestSourceDirectory>
+                </configuration>
+            </plugin>
+        </plugins>
+    </reporting>
+
+    <profiles>
+        <!--
+        This profile enables jacoco when unit tests are run.
+        You can run it with mvn -P jacoco test.
+        It also activates itself on Travis.
+        -->
+        <profile>
+            <id>jacoco</id>
+            <activation>
+                <property>
+                    <name>env.TRAVIS</name>
+                </property>
+            </activation>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.jacoco</groupId>
+                        <artifactId>jacoco-maven-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>prepare-agent</id>
+                                <phase>validate</phase>
+                                <goals>
+                                    <goal>prepare-agent</goal>
+                                </goals>
+                            </execution>
+                            <execution>
+                                <id>report</id>
+                                <phase>test</phase>
+                                <goals>
+                                    <goal>report</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+
+        <!--
+        For the Travis profile:
+        - we want to break the build on any checkstyle violation.
+        - we want to be able to publish coverage report to coveralls.
+        -->
+        <profile>
+            <id>travis</id>
+            <activation>
+                <property>
+                    <name>env.TRAVIS</name>
+                </property>
+            </activation>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-checkstyle-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>checkstyle</id>
+                                <phase>test</phase>
+                                <goals>
+                                    <goal>check</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.eluder.coveralls</groupId>
+                        <artifactId>coveralls-maven-plugin</artifactId>
+                        <version>4.3.0</version>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+</project>

thirdlab/src/main/java/com/ds/thirdlab/App.java

+package com.ds.thirdlab;
+
+/**
+ * Hello world!
+ */
+public final class App {
+    private App() {
+    }
+
+    /**
+     * Says hello to the world.
+     * @param args The arguments of the program.
+     */
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+    }
+}

thirdlab/src/main/java/com/ds/thirdlab/Flight.java

+package com.ds.thirdlab;
+
+public class Flight {
+
+    private String flightNumber;
+    private boolean connectingFlight;
+    private long connectionPeriod; 
+    
+    public Flight(String flightNumber, boolean connectingFlight){
+        this.flightNumber = flightNumber;
+        this.connectingFlight = connectingFlight;
+    }
+    public boolean setConnectionPeriod(long p){
+    	if (p < PQEntry.DEFAULT_KEY) {
+    		connectionPeriod = p;
+    		return true;
+    	}
+    	else return false;
+    }
+    public long getConnectionPeriod() { return connectionPeriod; }
+    
+    public String getFlightNumber() {
+        return flightNumber;
+    }
+    public void setFlightNumber(String flightNumber) {
+        this.flightNumber = flightNumber;
+    }
+    public boolean isConnectingFlight() {
+        return connectingFlight;
+    }
+    public void setConnectingFlight(boolean connectingFlight) {
+        this.connectingFlight = connectingFlight;
+    }
+    public String toString (){
+
+        return "F#"+flightNumber;
+    }
+
+
+
+}
\ No newline at end of file

thirdlab/src/main/java/com/ds/thirdlab/PQEntry.java

+package com.ds.thirdlab;
+
+public class PQEntry {
+	private long key; 
+	private Flight val; 
+	public static final long DEFAULT_KEY = 1000000; //Indicates a very low priority --used for non-connective flights.
+	
+	public PQEntry() {}
+	
+	public void setValue(Flight p){ 
+		val = p;
+		calcKey();
+	}
+	
+	private void calcKey(){
+		//TODO part
+	}
+	
+	public Flight getValue() {return val; }
+	
+	public long getKey(){
+		return key; 
+	}
+	
+	public String toString() {
+		return "Value: "+ val.toString() + ", key: "+ key;
+	}
+}
\ No newline at end of file

thirdlab/src/main/java/com/ds/thirdlab/UnsortedPriorityQueue.java

+package com.ds.thirdlab;
+
+import java.util.*;
+
+public class UnsortedPriorityQueue  {
+	private LinkedList<PQEntry> queue;
+	
+	public UnsortedPriorityQueue(){
+		queue = new LinkedList<PQEntry>(); 
+	}
+	
+	public void add(Flight p){
+		PQEntry entry = new PQEntry(); 
+		entry.setValue(p); 
+		queue.add(entry);
+	}
+	
+	public PQEntry removeMin(){
+		if(queue.isEmpty()){
+			System.out.println("The queue is empty.");
+			return null; 
+		}
+		else{
+			int min = 0; 
+			for(int i= 1; i<queue.size(); i++){
+				if(queue.get(min).getKey() > queue.get(i).getKey()) 
+					min =i;
+				else if(queue.get(min).getKey() == queue.get(i).getKey()){
+					if(min>i) min = i;
+				}
+				
+			}
+			
+			PQEntry minEntry = queue.get(min);
+			queue.remove(min);
+			return minEntry;
+		}
+		
+	}
+
+	public boolean isEmpty(){
+		return queue.isEmpty();
+	}
+	
+	public int size(){
+		return queue.size();
+	}
+	
+}
\ No newline at end of file

thirdlab/src/test/java/com/ds/thirdlab/AppTest.java

+package com.ds.thirdlab;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest {
+    /**
+     * Rigorous Test.
+     */
+    @Test
+    public void testApp() {
+        assertTrue(true);
+    }
+}