Created offer entry for java queue interface

content/java/concepts/queue/terms/offer/offer.md

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+---
+Title: 'offer()'
+Description: 'Inserts the specified element into the queue if possible without violating capacity limits.'
+Subjects:
+  - 'Code Foundations'
+  - 'Computer Science'
+Tags:
+  - 'Elements'
+  - 'Queues'
+CatalogContent:
+  - 'learn-java'
+  - 'paths/computer-science'
+---
+
+The **`.offer()`** method is part of the Java `Queue` interface and inserts an element at the end of the queue. It returns `true` if the element was added successfully, or `false` if the queue is at capacity and cannot accept new elements.
+
+Unlike the `add()` method, which throws an exception when the queue is full, `offer()` fails gracefully, making it useful when there is a need to handle capacity limits without triggering exceptions.
+
+## Syntax
+
+```pseudo
+queue.offer(element)
+```
+
+**Parameters:**
+
+- `element`: The element to be inserted to the queue.
+
+**Return value:**
+
+- Returns `true` if the element was added successfully, `false` if the queue is full.
+
+The `offer()` method is non-blocking, meaning it returns immediately if the queue is full. Instead of throwing an exception when capacity is reached, it returns `false`, making it safer for capacity-aware operations. Its behavior may vary between bounded and unbounded queue implementations.
+
+## Example: Using `offer()` in a Print Job Queue System
+
+In this example, a bounded queue with capacity two demonstrates how `offer()` returns `true` when adding elements within capacity and `false` when the queue is full:
+
+```java
+import java.util.Queue;
+import java.util.concurrent.ArrayBlockingQueue;
+
+public class PrintJobQueue {
+  public static void main(String[] args) {
+    Queue<String> printQueue = new ArrayBlockingQueue<>(2); // capacity of 2
+
+    boolean added = printQueue.offer("Document1");
+    System.out.println("Added Document1: " + added);
+
+    added = printQueue.offer("Document2");
+    System.out.println("Added Document2: " + added);
+
+    // Attempt to add another job to a full queue
+   added = printQueue.offer("Document3");
+   System.out.println("Added Document3: " + added);
+  }
+}
+```
+
+The output generated by this code is:
+
+```shell
+Added Document1: true
+Added Document2: true
+Added Document3: false
+```