Merge pull request TheAlgorithms#995 from shellhub/master

toString

Author: yanglbme

DataStructures/Queues/Queues.java

@@ -130,6 +130,20 @@ public boolean isFull() {
  public int getSize() {
  return nItems;
  }
+
+ @Override
+ public String toString() {
+ StringBuilder sb = new StringBuilder();
+ sb.append("[");
+ for (int i = front; ; i = ++i % maxSize) {
+ sb.append(queueArray[i]).append(", ");
+ if (i == rear) {
+ break;
+ }
+ }
+ sb.replace(sb.length() - 2, sb.length(), "]");
+ return sb.toString();
+ }
 }
 
 /**
@@ -143,7 +157,7 @@ public class Queues {
  *
  * @param args Command line arguments
  */
- public static void main(String args[]) {
+ public static void main(String[] args) {
  Queue myQueue = new Queue(4);
  myQueue.insert(10);
  myQueue.insert(2);
@@ -161,5 +175,6 @@ public static void main(String args[]) {
 
  System.out.println(myQueue.peekFront()); // Will print 2
  System.out.println(myQueue.peekRear()); // Will print 7
+ System.out.println(myQueue.toString()); // Will print [2, 5, 3, 7]
  }
 }