String Explorer (Java Swing)

This project is a small Java Swing desktop application that helps visualize how Java string indexing works using:

• s.charAt(i)
• s.substring(i)
• s.substring(i, j)

You can change the string s, and increment/decrement the indices i and j using arrow buttons to see the results instantly.

🎯 Goal

The goal of this mini-app is to practice:

• Java Swing event handling (ActionListener)
• Keeping a UI synchronized with internal state (updateUI())
• Understanding common String methods and index boundaries

🧩 Features

• Editable input string (String s)
• Controls to increase/decrease:
  • i
  • j
• Live display of:
  • s.charAt(i)
  • s.substring(i)
  • s.substring(i, j)