JOptionPane - input dialog box program

Question

Write a program that uses input dialog boxes to read three test marks  each out of 100  The program discards your lowest mark and shows the average of the two higher marks in a message dialog box    This is how far i got and i dont know where to do from here  any help would be appreciated   import javax swing JOptionPane    public class Average        public static void main  String    args            String test1  test2  test3  avg           test1  JOptionPane showInputDialog  Please input mark for test 1               test2  JOptionPane showInputDialog  Please input mark for test 2               test3  JOptionPane showInputDialog  Please input mark for test 3

User · Answer

After that you have to parse the results. Suppose results are in integers, then

int testint1 = Integer.parse(test1);

Similarly others should be parsed. Now the results should be checked for two higher marks in them, by using if statement After that take out the average.

User · Answer

Why to annoy the user with three different Dialog Boxes to enter things  why not do all this in one go in a single Dialog and save time  instead of testing the patience of the USER     You can add everything in a single Dialog  by putting all the fields on your JPanel and then adding this JPanel to your JOptionPane  Below code can clarify a bit more     import java awt    import java util    import javax swing     public class AverageExample       private double   marks      private JTextField   marksField      private JLabel resultLabel       public AverageExample                 marks   new double 3           marksField   new JTextField 3           marksField 0    new JTextField 10           marksField 1    new JTextField 10           marksField 2    new JTextField 10              private void displayGUI                 int selection   JOptionPane showConfirmDialog                  null  getPanel     Input Form                                       JOptionPane OK CANCEL OPTION                                   JOptionPane PLAIN MESSAGE            if  selection    JOptionPane OK OPTION                         for   int i   0  i  lt  3  i                                  marks i    Double valueOf marksField i  getText                                            Arrays sort marks               double average    marks 1    marks 2     2 0              JOptionPane showMessageDialog null                        Average is       Double toString average                         Average                           JOptionPane PLAIN MESSAGE                     else if  selection    JOptionPane CANCEL OPTION                           Do something here                       private JPanel getPanel                 JPanel basePanel   new JPanel              basePanel setLayout new BorderLayout 5  5            basePanel setOpaque true           basePanel setBackground Color BLUE darker              JPanel centerPanel   new JPanel            centerPanel setLayout new GridLayout 3  2  5  5            centerPanel setBorder              BorderFactory createEmptyBorder 5  5  5  5            centerPanel setOpaque true           centerPanel setBackground Color WHITE            JLabel mLabel1   new JLabel  Enter Marks 1               JLabel mLabel2   new JLabel  Enter Marks 2               JLabel mLabel3   new JLabel  Enter Marks 3                centerPanel add mLabel1           centerPanel add marksField 0            centerPanel add mLabel2           centerPanel add marksField 1            centerPanel add mLabel3           centerPanel add marksField 2             basePanel add centerPanel            return basePanel             public static void main String    args                SwingUtilities invokeLater new Runnable                          Override             public void run                                 new AverageExample   displayGUI

User · Answer

import java util SortedSet  import java util TreeSet   import javax swing JOptionPane  import javax swing JFrame   public class Average        public static void main String    args             String test1  JOptionPane showInputDialog  Please input mark for test 1               String test2  JOptionPane showInputDialog  Please input mark for test 2               String test3  JOptionPane showInputDialog  Please input mark for test 3               int int1   Integer parseInt test1           int int2   Integer parseInt test2           int int3   Integer parseInt test3            SortedSet lt Integer gt  set   new TreeSet lt  gt             set add int1           set add int2           set add int3            Integer    intArray   set toArray new Integer 3            JFrame frame   new JFrame            JOptionPane showInternalMessageDialog frame getContentPane    String format  Result  f    intArray 1    intArray 2     2 0

User · Answer

One solution is to actually use an integer array instead of separate test strings   You could loop  parse the response from JOptionPane showInputDialog into the individual elements of the array   Arrays sort could be used to sort them to allow you to pick out the 2 highest values   The average can be easily calculated then by adding these 2 values  amp  dividing by 2   int   testScore   new int 3    for  int i   0  i  lt  testScore length  i         testScore i    Integer parseInt JOptionPane showInputDialog  Please input mark for test     i              Arrays sort testScore   System out println  Average       testScore 1    testScore 2   2 0

[java] JOptionPane - input dialog box program

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