Home/ Questions/Ways to resolve exception in thread "main" java.lang.error: unresolved compilation problem: errors
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Zoé Nguyen
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Asked: 2022-05-11T18:57:59+00:00 In:

Ways to resolve exception in thread “main” java.lang.error: unresolved compilation problem: errors

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I get the error: exception in thread “main” java.lang.error: unresolved compilation problem: when I try to run the program below:

class Test {
  public static void main(String[] args) {
 
  Scanner input = new Scanner(System.in);
  Message messageObject = new Message ();
  Time timeObject = new Time ();
 
  System.out.println("Enter your message here: ");
  String message = input.nextLine();
 
  messageObject.simpleMessage(message);
  timeObject.getTime();
  }
 
  void simpleMessage(String message) {
  System.out.println(message + time);
  }
 }

The error appears the system notifies as follows:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
 Message cannot be resolved to a type
 Message cannot be resolved to a type
 The constructor Time() is undefined
 
 at Test.main(Test.java:8)

I tried to solve it with another sample. I got the reference in the community forum, but it still returned an invalid result. If someone knows the solution, please give me the support. Thanks!

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2 Answers

  1. Best Answer
    Expert

    The cause: The problem lies in the following line: Message messageObject = new Message ();

    Solution: This error indicates that the Message class was not available at compile time. You will need to import the message class.

    This is how it looks:

    import package1.package2.Message;
    • 14

  2. There are two options. Java Version incompatible, import

    • 19

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