🔗 Java code compilation using Java Compiler API

In Java development, compilation is the first defense against syntax errors, type mismatches, and other issues that can derail a project. While traditional workflows rely on manual compilation, modern applications demand dynamic compilation checks. For instance:

• An educational platform that validates student code submissions in real time
• A CI/CD pipeline that compiles generated code snippets before deployment
• A low-code tool that dynamically compiles user-defined logic
• A Hot Code Reload system that instantly reloads developer changes
• Creating Java plugins

The Java Compiler API enables these scenarios by allowing code compilation programmatically within Java applications. Platforms like LeetCode or Codecademy validate user-submitted code instantly. When users click “Run,” the backend compiles the snippet using tools like the Compiler API, checks for errors, and executes it in a sandboxed environment. Programmatic compilation powers this immediate feedback loop.

In this tutorial, we’ll explore how to leverage this powerful tool.