4003-707 Advanced Java Programming

all, section 8.6.

8.6. Throwable and Error

Please see: http://www.cs.rit.edu/usr/local/jdk/docs/api/index.html

An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch.
Most such errors are abnormal conditions.
The ThreadDeath error, though a "normal" condition, is also a subclass of Error because most applications should not try to catch it.

Src/7/ErrorE.java.minusSTART_STOP


public class ErrorE {

  private void thisMethodThrowsAnE(int index) throws Exception, Error {
        
        if ( index == 0 )       {
                System.out.println("thisMethodThrowsAnException() ---> " );
                throw new Exception("in thisMethodThrowsAnException");
        } else {
                System.out.println("thisMethodThrowsAnError() ---> " );
                throw new Error("in thisMethodThrowsAnException");
        }

  }

  private void caller() {
        for ( int index = 0; index < 2; index ++ )      {
                try {
                        new ErrorE().thisMethodThrowsAnE(index);
                } catch (Exception e)   {
                        e.printStackTrace();
                } catch (Error e)       {
                        e.printStackTrace();
                } finally       {
                        System.out.println("Finally");
                System.out.println("Ok, a few things to clean up" );
                }
        }
  }

  public static void main(String[] args) {
        new ErrorE().caller();
  }
}

Source Code: Src/7/ErrorE.java

java ErrorE
thisMethodThrowsAnException() ---> 
java.lang.Exception: in thisMethodThrowsAnException
        at ErrorE.thisMethodThrowsAnE(ErrorE.java:7)
        at ErrorE.caller(ErrorE.java:18)
        at ErrorE.main(ErrorE.java:31)
Finally
Ok, a few things to clean up
thisMethodThrowsAnError() ---> 
java.lang.Error: in thisMethodThrowsAnException
        at ErrorE.thisMethodThrowsAnE(ErrorE.java:10)
        at ErrorE.caller(ErrorE.java:18)
        at ErrorE.main(ErrorE.java:31)
Finally
Ok, a few things to clean up