Added files to be used in lecture.

Persons contains a bug that we aim to find and fix in lecture.

src/main/java/lecture5/objects/Person.java

+package lecture5.objects;
+
+public class Person {
+
+	int age;
+	String name;
+	
+	//Konstruktør brukes til å lage nye objekter.
+	Person(String nameInput){
+		age = 0;
+		name = nameInput;
+	}
+	Person(String name,int age){
+		this.age = age;
+		this.name = name;
+	}
+	
+	@Override
+	public String toString() {
+		return name+" is "+age+" years";
+	}
+	
+	void growOlder() {
+		age = age+1;
+	}
+}

src/main/java/lecture5/objects/Persons.java

+package lecture5.objects;
+import java.util.ArrayList;
+
+
+
+/**
+ * This program keeps track of a list of persons names and ages.
+ * 
+ * @author Martin Vatshelle
+ */
+public class Persons {
+
+	public static void main(String[] args) {
+		ArrayList<String> names = new ArrayList<String>();
+		ArrayList<Integer> ages = new ArrayList<Integer>(); 
+		
+		fill(names, ages);
+		printAll(names, ages);
+		removeLast(names, ages);
+		System.out.println();
+		printAll(names, ages);
+	}
+
+	/**
+	 * Persons are stored in 2 lists, 
+	 * index i in names gives the name of person i and 
+	 * index i in ages gives the age of person i
+	 * 
+	 * This method removes the last person from the list
+	 * 
+	 * @param names a list of names
+	 * @param ages a list of ages
+	 */
+	private static void removeLast(ArrayList<String> names, ArrayList<Integer> ages) {
+		names.remove(names.size()-1);
+		ages.remove(names.size()-1);
+	}
+
+	/**
+	 * Fills two lists with the same number of elements.
+	 * names.get(i) and ages.get(i) are the name and age of person i
+	 *  
+	 * @param names The List of names to be filled
+	 * @param ages The List of ages to be filled
+	 */
+	public static void fill(ArrayList<String> names, ArrayList<Integer> ages) {
+		names.add("Anna");
+		ages.add(12);
+
+		names.add("Per");
+		ages.add(3);
+
+		names.add("Hans");
+		ages.add(7);
+
+		names.add("Lise");
+		ages.add(9);
+	}
+	
+	/**
+	 * Prints out the names and ages of a list of Persons
+	 * 
+	 * @param names
+	 * @param ages
+	 */
+	public static void printAll(ArrayList<String> names, ArrayList<Integer> ages) {
+		for(int i=0; i<names.size(); i++) {
+			System.out.println(names.get(i)+" is "+ ages.get(i)+" years.");
+		}
+	}
+}

src/main/java/no/uib/inf101/sample/Main.java

-package no.uib.inf101.sample;
-
-/**
- * Hello world!
- */
-public class Main {
-
-  public static void main(String[] args) {
-    System.out.println("Hello World!");
-  }
-}