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/BuzzwordSupplier.java

@@ -0,0 +1,39 @@
+import java.util.Random;
+import java.util.function.Supplier;
+
+/**
+ * A string supplier that provides an endless stream of random buzzwords.
+ */
+public class BuzzwordSupplier implements Supplier<String> {
+
+	private static final String[] SET_1 = {
+			"ABILITY","BASAL","BEHAVIORAL","CHILD-CENTERED",
+			"DIFFERENTIATED","DISCOVERY","FLEXIBLE","HETEROGENEOUS",
+			"HOMOGENEOUS","MANIPULATIVE","MODULAR","TAVISTOCK",
+			"INDIVIDUALIZED" };
+
+	private static final String[] SET_2 = {
+			"LEARNING","EVALUATIVE","OBJECTIVE",
+			"COGNITIVE","ENRICHMENT","SCHEDULING","HUMANISTIC",
+			"INTEGRATED","NON-GRADED","TRAINING","VERTICAL AGE",
+			"MOTIVATIONAL","CREATIVE" };
+
+	private static final String[] SET_3 = {
+			"GROUPING","MODIFICATION", "ACCOUNTABILITY","PROCESS",
+			"CORE CURRICULUM","ALGORITHM", "PERFORMANCE",
+			"REINFORCEMENT","OPEN CLASSROOM","RESOURCE", "STRUCTURE",
+			"FACILITY","ENVIRONMENT" };
+
+	private final Random random = new Random();
+
+	/**
+	 * Create a buzzword by concatenating a random word from each of the
+	 * three word sets.
+	 */
+	@Override
+	public String get() {
+		return SET_1[random.nextInt(SET_1.length)] + ' ' +
+				SET_2[random.nextInt(SET_2.length)] + ' ' +
+				SET_3[random.nextInt(SET_3.length)];
+	}
+}