How Java Class Loaders Work: From Bootstrap to Custom Implementations

This tutorial explains Java class loaders—including bootstrap, platform, and system loaders—their delegation model, visibility rules, and how to create custom loaders, providing code examples and a clear overview of their role in the JVM.

Class LoaderJVMcustom-loader

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How Java Class Loaders Work: From Bootstrap to Custom Implementations

Qunar Tech Salon

Jun 9, 2015 · Fundamentals

Understanding Java Class Loading and the Delegation Model

This article explains how Java class loading works, describing the hierarchical delegation model, the three loading phases (loading, linking, initialization), common ClassLoader‑related exceptions, and practical tips for troubleshooting class‑loading issues.

Exceptionsclass loadingdelegation-model

0 likes · 8 min read