Update PriorityQueues.java

DataStructures/Queues/PriorityQueues.java

@@ -1,21 +1,25 @@
 /**
  * This class implements a PriorityQueue.
- * 
+ * <p>
  * A priority queue adds elements into positions based on their priority.
  * So the most important elements are placed at the front/on the top.
  * In this example I give numbers that are bigger, a higher priority.
  * Queues in theory have no fixed size but when using an array
  * implementation it does.
  *
- * @author Unknown
- *
  */
 class PriorityQueue {
-	/** The max size of the queue */
+    /**
+     * The max size of the queue
+     */
     private int maxSize;
-	/** The array for the queue */
+    /**
+     * The array for the queue
+     */
     private int[] queueArray;
-	/** How many items are in the queue */
+    /**
+     * How many items are in the queue
+     */
     private int nItems;
 
     /**
@@ -35,22 +39,20 @@ class PriorityQueue{
      * @param value Value to be inserted
      */
     public void insert(int value) {
+        if (isFull()) {
+            throw new RuntimeException("Queue is full");
+        }
         if (nItems == 0) {
             queueArray[0] = value;
-			nItems++;
-		}
-		else if(isFull()){	//does not insert value when the queue is full
-			System.out.println("Queue is full");
-		}
-		else{
+        } else {
             int j = nItems;
             while (j > 0 && queueArray[j - 1] > value) {
                 queueArray[j] = queueArray[j - 1]; // Shifts every element up to make room for insertion
                 j--;
             }
             queueArray[j] = value; // Once the correct position is found the value is inserted
-			nItems++;
         }
+        nItems++;
     }
 
     /**
@@ -103,7 +105,6 @@ class PriorityQueue{
  * This class implements the PriorityQueue class above.
  *
  * @author Unknown
- *
  */
 public class PriorityQueues {
     /**
@@ -111,7 +112,7 @@ public class PriorityQueues{
      *
      * @param args Command Line Arguments
      */
-	public static void main(String args[]){
+    public static void main(String[] args) {
         PriorityQueue myQueue = new PriorityQueue(4);
         myQueue.insert(10);
         myQueue.insert(2);