Make sure you have started your Java server or application with the debugger parameters like -agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=n
Open CoreIDE.
Open your project.
Go to Run/Debug tab.
Click on Add (+) button it will open a new window. Here you can create your new run/debug configuration.
Go to Java tab in the new window.
Enter unique configuration name.
Check the remote checkbox.
Enter desired port number like 8000 as entered in first step.
Configure other fields as needed.
Click on Save button.
Now you can select your configuration from the dropdown and click on Run or Debug buttons to start.
You can hover your cursor over the buttons to know the purpose and keyboard shortcut of a button.
You can go to any Java file in the project and click on sidebar to add breakpoints.
You can launch the debugger by pressing the () button.