Create java-stack-examples

java-stack-examples

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+import java.util.Iterator;
+import java.util.ListIterator;
+import java.util.Stack;
+
+public class IterateOverStackExample {
+    public static void main(String[] args) {
+        Stack<String> stackOfPlates = new Stack<>();
+
+        stackOfPlates.add("Plate 1");
+        stackOfPlates.add("Plate 2");
+        stackOfPlates.add("Plate 3");
+        stackOfPlates.add("Plate 4");
+
+        System.out.println("=== Iterate over a Stack using Java 8 forEach() method ===");
+        stackOfPlates.forEach(plate -> {
+            System.out.println(plate);
+        });
+
+        System.out.println("\n=== Iterate over a Stack using iterator() ===");
+        Iterator<String> platesIterator = stackOfPlates.iterator();
+        while (platesIterator.hasNext()) {
+            String plate = platesIterator.next();
+            System.out.println(plate);
+        }
+
+        System.out.println("\n=== Iterate over a Stack using iterator() and Java 8 forEachRemaining() method ===");
+        platesIterator = stackOfPlates.iterator();
+        while (platesIterator.hasNext()) {
+            String plate = platesIterator.next();
+            System.out.println(plate);
+        }
+
+
+        System.out.println("\n=== Iterate over a Stack from TOP to BOTTOM using listIterator() ===");
+        // ListIterator allows you to traverse in both forward and backward directions.
+        // We'll start from the top of the stack and traverse backwards.
+        ListIterator<String> platesListIterator = stackOfPlates.listIterator(stackOfPlates.size());
+        while (platesListIterator.hasPrevious()) {
+            String plate = platesListIterator.previous();
+            System.out.println(plate);
+        }
+    }
+}
+
+***********************************************************************************************************************************************************************
+
+import java.util.Stack;
+
+public class StackExample {
+    public static void main(String[] args) {
+        // Creating a Stack
+        Stack<String> stackOfCards = new Stack<>();
+
+        // Pushing new items to the Stack
+        stackOfCards.push("Jack");
+        stackOfCards.push("Queen");
+        stackOfCards.push("King");
+        stackOfCards.push("Ace");
+
+        System.out.println("Stack => " + stackOfCards);
+        System.out.println();
+
+        // Popping items from the Stack
+        String cardAtTop = stackOfCards.pop();  // Throws EmptyStackException if the stack is empty
+        System.out.println("Stack.pop() => " + cardAtTop);
+        System.out.println("Current Stack => " + stackOfCards);
+        System.out.println();
+
+        // Get the item at the top of the stack without removing it
+        cardAtTop = stackOfCards.peek();
+        System.out.println("Stack.peek() => " + cardAtTop);
+        System.out.println("Current Stack => " + stackOfCards);
+
+    }
+}
+
+***********************************************************************************************************************************************************************
+
+import java.util.Stack;
+
+public class StackSizeSearchExample {
+    public static void main(String[] args) {
+        Stack<String> stackOfCards = new Stack<>();
+
+        stackOfCards.push("Jack");
+        stackOfCards.push("Queen");
+        stackOfCards.push("King");
+        stackOfCards.push("Ace");
+
+        System.out.println("Stack : " + stackOfCards);
+
+        // Check if the Stack is empty
+        System.out.println("Is Stack empty? : " + stackOfCards.isEmpty());
+
+        // Find the size of Stack
+        System.out.println("Size of Stack : " + stackOfCards.size());
+
+        // Search for an element
+        // The search() method returns the 1-based position of the element from the top of the stack
+        // It returns -1 if the element was not found in the stack
+        int position = stackOfCards.search("Queen");
+
+        if(position != -1) {
+            System.out.println("Found the element \"Queen\" at position : " + position);
+        } else {
+            System.out.println("Element not found");
+        }
+
+    }
+}