--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fschmidt/util/java/ArrayStack.java	Sun Oct 05 17:24:15 2025 -0600
@@ -0,0 +1,35 @@
+package fschmidt.util.java;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.EmptyStackException;
+
+
+public class ArrayStack<E> extends ArrayList<E> implements Stack<E> {
+
+	public ArrayStack() {}
+
+	public ArrayStack(Collection<E> c) {
+		super(c);
+	}
+
+	@Override public void push(E item) {
+		add(item);
+	}
+
+	@Override public E pop() throws EmptyStackException {
+		int	len = size();
+		if (len == 0)
+			throw new EmptyStackException();
+		return remove(len - 1);
+	}
+
+	@Override public E peek() throws EmptyStackException {
+		int	len = size();
+		if (len == 0)
+			throw new EmptyStackException();
+		return get(len - 1);
+	}
+
+}