import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.util.*; import java.text.*; /** * Class MetricUnitConversion - * * @author N.Kuder * @version 1.5 12/8/2015 */ public class MetricUnitConversion extends JApplet implements ActionListener { // Declaring all of the variables that are to be used in the applet double grams; double meters; double liters; String units; String modifyer; double input; double output; /**Creating an array of JButtons, these are grouped together because they are the conversions to smaller units * typically thought of as to the left when showing diagrams of the conversions, as such these buttons were desired to be to the * left of the other conversions. It is also worth noting that they are called WESTbuttons because the original applet used borderlayout, * since then it has been changed to a gridlayout but the name remains the same. */ JButton WESTbuttons[] = { new JButton("pico"), new JButton("nano"), new JButton("micro"), new JButton("milli"), new JButton("centi"), new JButton("deci")}; /**Creating an array of JButtons for the larger conversions, grouped together so that they can be to the right of the smaller conversions. * Once again these are called EASTbuttons because of the original applets layout. */ JButton EASTbuttons[] = {new JButton ("deca"), new JButton ("hecto"), new JButton("kilo"), new JButton("mega"), new JButton("giga"), new JButton("tetra")}; /**This array of JButtons was originally created for buttons that would switch the units, this has since been changed to something that the * textfields do so these buttons are no longer in the applet. As the project description was to have three textfields for the inputs that is * what I did, however my original idea was to have one textfield for the input of the numerical value and then have buttons change the units, * so I have left the initilazation in so that the program can be easily modified to do that if I decide to in the future for my own use. * */ JButton unit[] = {new JButton ("meters"), new JButton ("grams"), new JButton ("liters")}; JPanel WESTpane = new JPanel();//Initializing a JPanel for the WESTbuttons, the buttons will be added in a loop JPanel EASTpane = new JPanel();//Initializing a JPanel for the EASTbuttons, the buttons will be added in a loop JPanel CENTERpane = new JPanel();//This was originally for the units buttons, it no longer has a purpose /** * Creating an array of text fields * These fields will be used to recieve the input of numeric values from the user as well as change the untis from a variation of meters, * liters, or grams */ JTextField UnitsFields[] = {new JTextField("meters"), new JTextField("grams"), new JTextField("liters")}; JLabel title = new JLabel("Metric Unit Conversions");//Creating the title in the form of a JLabel JPanel Unitspane = new JPanel(); JButton help = new JButton("Help");//creating a help button JTextField AnswerField = new JTextField("output " + "unselected");//Creating a textfield that will display the converted number as well as the units DecimalFormat myFormat = new DecimalFormat(".0");//setting the decimal format to one decimal place JLabel UnitsLabel[] = {new JLabel("meters"), new JLabel("grams"), new JLabel("liters")}; public void setupButtons() { } public void init() { getContentPane().setBackground(Color.white);//setting the background color setLayout( new GridLayout(2,3));//setting the layout to a grid layout add( title, BorderLayout.NORTH);//Adding the title to the applet in the first grid, upper left corner for(int i = 0; i