Technical Abhishek on Instagram: "Here are 10 effective ways to optimize Java code performance 🚀 — used widely in professional projects: ✅ Use StringBuilder for concatenation — Instead of String + String in loops, use StringBuilder or StringBuffer. 🧵 ✅ Avoid unnecessary object creation — Reuse objects when possible, especially inside loops or frequently called methods. ♻️ ✅ Use efficient data structures — Prefer ArrayList over Vector, HashMap over Hashtable, and choose the right