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Meaning of Error Squiggles in VSCode Java

My java code has these error squiggles. What do they mean and how do I disable them?

Error Squiggles Java

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What do these mean? What does the software suggest me to do?

PS: I'm a complete newb

Solution

  • Hints, no error. For proposing code changes, and SonarLint: code style warnings.

    Here it suggests (wrongly so) to replace System.out by a shorter final PrintWriter, say out, so you need only to use out.println(...). That is not normally done.

    But a similar rule states that one should use a Logger instead.

    For the main: new Hello().execute(); and then in a separate non-static method (execute) do the code you wrote in main.

    SonarLint: code style checker, named after the C lint tool to find "lint" in the code, dubious code pieces, like unitialized variables, dangerous lossy conversions and such.

    Writing to System.out (the console) is not good style in a web server or a GUI desktop application, hence the advice is to use a Logger for logging interesting information, possibly to the console, but also possibly to a log file.

    You should especially as a beginner not disable the linting extension. Ignore the squiggles, only from time to time look at them. One can also disable specific SonarLint rules one finds dumb.