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Semester 1/Programming 1/Java/examples/people/Database.java

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+import java.util.ArrayList;
+import java.util.Iterator;
+
+/**
+ * A very simple database of people in a university. This class simply stores
+ * persons and, at request, lists them on standard output.
+ *
+ * Written as a first demo program for BlueJ.
+ *
+ * @author  Michael Kolling
+ * @version 1.1, March 2002
+ */
+
+public class Database {
+
+	private ArrayList persons;
+
+ 	/**
+	 * Create a new, empty person database.
+     */
+  	public Database() 
+	{
+        persons = new ArrayList();
+    }
+
+    /**
+     * Add a person to the database.
+     */
+    public void addPerson(Person p) 
+	{
+        persons.add(p);
+    }
+
+    /**
+     * List all the persons currently in the database on standard out.
+     */
+    public void listAll () 
+    {
+        for (Iterator i = persons.iterator(); i.hasNext();) {
+            System.out.println(i.next());
+        }
+    }
+}