Merge pull request csubhasundar#206 from kunal15112001/main

Implementation for Stack Using Java

Author: sherigar

Stack java

@@ -0,0 +1,65 @@
+import java.util.ArrayList;
+import java.util.EmptyStackException;
+
+public class Stack<T> {
+    private ArrayList<T> stack = new ArrayList<>();
+
+    // Push an item onto the stack
+    public void push(T item) {
+        stack.add(item);
+    }
+
+    // Pop an item from the stack
+    public T pop() {
+        if (isEmpty()) {
+            throw new EmptyStackException();
+        }
+        return stack.remove(stack.size() - 1);
+    }
+
+    // Peek at the top item of the stack
+    public T peek() {
+        if (isEmpty()) {
+            throw new EmptyStackException();
+        }
+        return stack.get(stack.size() - 1);
+    }
+
+    // Check if the stack is empty
+    public boolean isEmpty() {
+        return stack.isEmpty();
+    }
+
+    // Get the size of the stack
+    public int size() {
+        return stack.size();
+    }
+
+    // Clear the stack
+    public void clear() {
+        stack.clear();
+    }
+
+    // Override toString for easy printing
+    @Override
+    public String toString() {
+        return stack.toString();
+    }
+
+    public static void main(String[] args) {
+        Stack<Integer> stack = new Stack<>();
+
+        stack.push(1);
+        stack.push(2);
+        stack.push(3);
+
+        System.out.println("Stack: " + stack);
+        System.out.println("Size: " + stack.size());
+
+        System.out.println("Pop: " + stack.pop());
+        System.out.println("Stack: " + stack);
+        System.out.println("Size: " + stack.size());
+
+        System.out.println("Peek: " + stack.peek());
+    }
+}