ConditionDemo: removed final keyword not to confuse students

ConditionDemo/src/Consumer.java

@@ -5,10 +5,10 @@ import java.util.HashSet;
 import java.util.Set;
  
 public class Consumer extends Thread {
-    private final Set knownObjects = new HashSet();
+    private Set knownObjects = new HashSet();
     private int total = 0;
     private int unique = 0;
-    private final SharedFiFoQueue queue;
+    private SharedFiFoQueue queue;
  
     public Consumer(SharedFiFoQueue queue) {
         this.queue = queue;

ConditionDemo/src/Producer.java

@@ -8,8 +8,8 @@ import java.io.FileReader;
 import java.io.IOException;
  
 public class Producer extends Thread {
-    private final static String FILENAME = "input.txt";
-    private final SharedFiFoQueue queue;
+    private static String FILENAME = "input.txt";
+    private SharedFiFoQueue queue;
      
     public Producer(SharedFiFoQueue queue) {
         this.queue = queue;

ConditionDemo/src/SharedFiFoQueue.java

@@ -10,9 +10,9 @@ public class SharedFiFoQueue {
     private int PosW = 0;
     private int PosR = 0;
      
-    private final Lock lock = new ReentrantLock();
-    private final Condition isEmpty = lock.newCondition();
-    private final Condition isFull = lock.newCondition();
+    private Lock lock = new ReentrantLock();
+    private Condition isEmpty = lock.newCondition();
+    private Condition isFull = lock.newCondition();
      
     public SharedFiFoQueue(int capacity) {
         this.elems = new Object[capacity];