Progress Bars and Sliders

The assignment is rather short, so it is doubtful you will need a progress bar for your project. One possibility is to visually indicate how many seats are left on a flight (or whatever is applicable to your assignment scenario). A progress bar can be oriented horizontally (left to right, which is the default) or vertically (bottom to top). These are the progress bars and the slider used in Swing:

• JProgressBar ” Displays a vertical or horizontal box that is progressively filled by a bar indicating what percentage of the task has been completed.

• ProgressMonitor ” This component is related to JProgressBar, but isn't visible until it pops up a dialog box, if the operation will take a while.

• JSlider ” This component enables the user to select a numeric value within a given range by sliding a knob. Forcing the user to pick the value by sliding the knob eliminates typing errors.

Use components in your GUI that eliminate user typing errors. For example, make the user pick an item from a list or combo box instead of typing it into a text field.

The following snippet is an example for the JProgressBar:

 int minimum = 0;  //seats int maximum = 50; //seats JProgressBar progress = new JProgressBar(JProgressBar.VERTICAL, minimum, maximum);