optionally assign values from args; support null data when printing

1 files changed, 28 insertions, 16 deletions

diff --git a/dk/abcdefghijklmnopqrstuvxyzæøå/bachelorizer/Main.java b/dk/abcdefghijklmnopqrstuvxyzæøå/bachelorizer/Main.java
index c6c583e..b69047e 100644
--- a/dk/abcdefghijklmnopqrstuvxyzæøå/bachelorizer/Main.java
+++ b/dk/abcdefghijklmnopqrstuvxyzæøå/bachelorizer/Main.java
@@ -29,27 +29,39 @@ public class Main {
 
 	/// Main constructor
 	///
-	/// @param name        name of student as String
-	/// @param activities  chosen activities as String array
-	public Main(
-		final String name,
-		final String[] activities
-	) {
-		this.name = name;
-		this.activities = activities;
+	/// @param args  command-line arguments or default demo data
+	public Main(final String[] args) {
+		if (args.length > 0 && args[0] != null) {
+			this.name = args[0];
+			if (args.length > 1 && args[1] != null) {
+				this.activities = Arrays.copyOfRange(
+					args, 1, args.length);
+			}
+		}
 	}
 
 	/// JVM entry point
 	///
-	/// @param args  command-line arguments (ignored)
-	public static void main(final String[] args) {
-		Main session = new Main(
-			"Jonas Smedegaard",
-			new String[] {"CS-SMC2", "CS-SMC3"});
+	/// @param args  command-line arguments
+	public static void main(String[] args) {
+
+		if (args.length == 0)
+			args = new String[] {
+				"Jonas Smedegaard",
+				"CS-SMC2",
+				"CS-SMC3",
+			};
+
+		Main session = new Main(args);
 
 		// minimal viable product
-		System.out.printf("Hi %s%nYou chose these activities: ",
-			session.name);
-		System.out.println(Arrays.toString(session.activities));
+		System.out.printf("Hi %s%n",
+			(session.name != null)
+				? session.name
+				: "stranger");
+		System.out.printf("You chose these activities: %s%n",
+			(session.activities != null)
+				? Arrays.toString(session.activities)
+				: "[nothing]");
 	}
 }