Starting the Debugger Session

In this section:

• Before debugging
• Debugging an application

Before debugging

• Configure debugger options.
• Specify the roots, dependencies and libraries to be passed to the Debugger.
• Set breakpoints in the source code.
• If necessary, create or modify the corresponding Run/Debug configuration.

The debug session starts with the selected run/debug configuration. Note that several debug processes can be launched simultaneously.

When debugging an application in IntelliJ IDEA, keep in mind that

• If the Make module before running/debugging/reloading option has been selected, IntelliJ IDEA first compiles all modified sources in your project.
• IntelliJ IDEA proceeds with debugging, if compilation reports no errors.
• If the code has not been compiled before debugging, the source and class files might be out of sync.
• If you specify the -classpath option in the VM Options field, the selected module classpath will be overridden.
• If you debug a JavaScript source, IntelliJ IDEA opens a browser for the HTML file with your script in a separate frame.

Debugging an application