PMD(Programming Mistake Detector) is an open-source static source code analyzer that reports on issues found within the application code. PMD includes built-in rule sets and supports the ability to write custom rules. PMD does not report compilation errors, as it only can process well-formed source files.
For PMD issues, the HTML file location is generated and the respective PMD issues have to be solved by opening the HTML file path in the Browser Preview.
Search for the ‘Beaker shaped’ browser preview which is located on the left panel of your VSCODE,
Paste the HTML file link in your URL of the browser.
You can search the respective PMD issues on Google.