Convert 20_Buzzword to Java

The original version was a straight forward monolithic BASIC-to-Java
conversion. Updated to use common Java coding conventions.

 - Split the single static main method into classes. The static part
   only contains the bootstrap code for the game.
 - Split the word list into three arrays so that there is no need to
   use error-prone calculations when choosing the random words.
 - Placed the Scanner in a try-with-resources block to ensure that the
   scanner gets closed when it is no longer needed.

20_Buzzword/java/src/UserInterface.java

@@ -0,0 +1,57 @@
+import static java.lang.System.out;
+
+import java.util.Scanner;
+import java.util.function.Supplier;
+
+/**
+ * A command line user interface that outputs a buzzword every
+ * time the user requests a new one.
+ */
+public class UserInterface implements Runnable {
+
+	/**
+	 * Input from the user.
+	 */
+	private final Scanner input;
+
+	/**
+	 * The buzzword generator.
+	 */
+	private final Supplier<String> buzzwords;
+
+	/**
+	 * Create a new user interface.
+	 *
+	 * @param input The input scanner with which the user gives commands.
+	 * @param buzzwords The buzzword supplier.
+	 */
+	public UserInterface(final Scanner input,
+		final Supplier<String> buzzwords) {
+		this.input = input;
+		this.buzzwords = buzzwords;		
+	}
+
+	@Override
+	public void run() {
+		out.println("              BUZZWORD GENERATOR");
+		out.println("   CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+		out.println();
+		out.println();
+		out.println();
+		out.println("THIS PROGRAM PRINTS HIGHLY ACCEPTABLE PHRASES IN");
+		out.println("'EDUCATOR-SPEAK' THAT YOU CAN WORK INTO REPORTS");
+		out.println("AND SPEECHES.  WHENEVER A QUESTION MARK IS PRINTED,");
+		out.println("TYPE A 'Y' FOR ANOTHER PHRASE OR 'N' TO QUIT.");
+		out.println();
+		out.println();
+		out.println("HERE'S THE FIRST PHRASE:");
+
+		do {
+			out.println(buzzwords.get());
+			out.println();
+			out.print("?");
+		} while ("Y".equals(input.nextLine().toUpperCase()));
+
+		out.println("COME BACK WHEN YOU NEED HELP WITH ANOTHER REPORT!");
+	}
+}