UsingSystemClasses, Part 1

QUESTION: About how many minutes do you think it will take you to complete Part 1 of UsingSystemClasses? 

QUESTION: What time is it now? 

QUESTION: What does the showMessageDialog method do? 

QUESTION: What happens if you try to run the program a second time? What if you try to recompile it after you've run it? 

Question: Suppose you added more statements after the System.exit(0) statement. Would they ever be exectued?

QUESTION: What error message do you now get when you try to compile the project? 

Question: Explain the role of the import statement.

QUESTION: What does an asterisk in an import statement tell the compiler? 

Question: What effect does the \n have on the way the message is displayed?

QUESTION: How can you find out what package (e.g. javax.swing) to import in order to be able to access a class? 

QUESTION: Does it seem fair that you are doing all the typing and the program still says that Prof. Merkle wrote it? 

QUESTION: What compilation error do you get when you reference a variable that has not been declared? 

QUESTION: Explain the roles of the declaration statement, the new operator, and the assignment statement. 

QUESTION: What error message do you get when you declare a Date object without importing the appropriate package? 

QUESTION: What packages contain Date classes? 

QUESTION: What error message do you get when you reference a class that is defined in more than one imported package? 

QUESTION: Which package provides a Date constructor that allocates a Date object and initializes it so that it represents the time at which it was allocated? 

Question: Why does referencing the startTime variable when it has been declared but not assigned cause a compilation error?

Question: List eight pieces of information that are included in the value returned by the toString method of the Date class. 

QUESTION: What time is represented by the startTime object? 

QUESTION: What event's duration has the largest impact on the difference between the times represented by the startTime and endTime objects? 

QUESTION: What package contains the SimpleDateFormat class? 

Question: What are the six pieces of information that are included in the String objects resulting from using the default SimpleDateFormat value to format Date objects? 

Question: Explain the meaning of each part of the String object used to initialize theFormat. 

QUESTION: How many showInputDialog methods does the JOptionPane class have? What do they do? 

Question: What is the return type of the method call in the statement that you just added? 

QUESTION: What does the new operator do? What is special about it's use in the context of String objects? 

QUESTION: Which package must you import so that you can create dialog windows? 

QUESTION: What class do you use to create dialog windows? 

QUESTION: What method do you use to create a dialog window to display a message? 

QUESTION: What method do you use to create a dialog window to display a message and prompt the user for a String input? 
QUESTION: How much time did you spend on Part 1 of UsingSystemClasses? Compare your answer to how much time you had estimated that you would spend. You receive full credit no matter how far off your estimate is!