What is the difference between hot loading and hot deployment in java

First of all, whether it is hot loading or hot deployment, the project can be compiled/deployed without restarting the service, both are implemented based on Java class loader.

The difference between the two is as follows:

In terms of deployment method:

Hot deployment is to redeploy the project while the server is running.

Hot loading is to reload classes at runtime.

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In terms of implementation principle:

Hot deployment is to directly reload the entire Application is relatively time-consuming.

Hot loading is to reload the class at runtime. A thread will be started in the background to continuously detect whether your class has changed.

In terms of usage scenarios:

Hot deployment is more commonly used in production environments.

Hot loading is more commonly used in development environments. It cannot be used online due to security issues and is difficult to monitor.

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