JDK6

Qunar Tech Salon

Dec 24, 2014 · Fundamentals

Understanding Java String.substring Memory Leak in JDK 6 and Its Fix in JDK 7

This article explains how the original JDK 6 implementation of String.substring could retain large character arrays and cause apparent memory‑leak‑like OutOfMemoryError, describes the underlying fields, reproduces the issue, and shows how JDK 7’s copy‑on‑substring redesign resolves the problem.