Q&A of PS1

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• About Errors.txt:
  • Q: I am using a commandline. How do I collect the error messages and what do they look like?
    A: The error message of javac is sent to the error channel. To save to a file, say err.txt, type

      javac HelloWorld.java > err.txt 2>&1
    

    Then the output is in err.txt
    You can open err.txt and paste into Errors.txt.
    
    
  • Q: What is a possible format of Errors.txt?
    A:

    - change class to Class:
    
    HelloWorld.java:18: class, interface, or enum expected
    public Class HelloWorld
           ^
    HelloWorld.java:24: class, interface, or enum expected
            public static void main(String[] args)
                          ^
    HelloWorld.java:28: class, interface, or enum expected
            }
            ^
    3 errors