Ex2 tp1

src/main/java/stack.java

+public class stack {
+
+    private Vector vector;
+
+    public stack() {
+        vector = new Vector();
+    }
+
+    public void push(int value) {
+        vector.add(value);
+    }
+
+    public int peek() {
+        if (vector.isEmpty()) {
+            throw new IllegalStateException("La pile est vide");
+        }
+        return vector.get(vector.size() - 1);
+    }
+
+    public int pop() {
+        if (vector.isEmpty()) {
+            throw new IllegalStateException("La pile est vide");
+        }
+        int topElement = vector.get(vector.size() - 1);
+        vector.resize(vector.size() - 1);
+        return topElement;
+    }
+
+    public int size() {
+        return vector.size();
+    }
+
+    public boolean isEmpty() {
+        return vector.isEmpty();
+    }
+}