Hi Robert Your definition of instanciation is a bit confusing when you say that "this is when you create a new object or primitive variable that is based on some class or primitive data type. You do this with the operator new". But you know new is not used to instanciate primitive data types.
Regards Atif On Tue, Jun 23, 2009 at 12:59 AM, Robert Childers < [email protected]> wrote: > > Definition of terms. > > Instance -- This is where you create a new object or primitive > variable that is based on some class or a primitive. You do this with > the operator new. Example String[] names = new String[20]; This > creates an array capable of holding 20 strings. The array's location > in memory is passed to the variable names. Thus we instantiate an > object. > > Initialize. This is where I set the value of a variable to a starting > value. For instance if I had int counter; counter=0; I have created or > instantiated the variable counter and then I initialize it to 0; > > Index variable. Any variable that I create to index the locations in > an array. It is what i am doing with the variable that cause me to > call it an index variable. > example > for (int i=0;i<names.length;i++) System.out.println(names[i]); > Here I have used a for loop to repeat the statement System.out.println > (names[i]); > The loop increments the variable i so that it indexes or goes through > all the locations in the array. Each time that it goes through loop > the next string in the array is printed to the screen. > > for, while and do while are all ways to repeat the execution of code. > The for loop is designed to let you set up a variable that will > increment or decrement each time you go through the loop. > > The while and do while loops can be used to do the same thing, but > they have the ability to set up any number of conditions that will > control the loop. It can be anything from testing to see if you are at > the end of a file that your program is reading, to checking to see if > someone clicked end turn in a game. While and do while loops give you > a very flexible looping system. for loops give you a countable looping > system. > > On Jun 21, 9:50 pm, "function(phil)" <[email protected]> wrote: > > Thanks for your reply. > > > > Okay. Let's discuss language. In the paragraph below you us the term > > initialization. What does that mean? > > Does it mean the same as I've heard instantiate a variable and declare > > a variable? Then you use the term "index variable" what does that > > mean? I know what a variable is > > but what do you mean by "index"? > > > > Regarding the while statement. The following code doesn't work as > > planned but it shows my understanding of the > > use of the "while loop". It's a real world example. I think the > > courses should use real world examples. The use of displaying names > > 20 times doesn't make much since to me. > > > > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/javaprogrammingwithpassion?hl=en -~----------~----~----~----~------~----~------~--~---
