QuestionQuestion

Problem 1
Design a GUI program to find the weighted average of four test scores. The four test scores and their respective weights are given in the following format:

testscore1 weight1
...

For example, the sample data is as follows:

75 0.20
95 0.35
85 0.15
65 0.30

The user is supposed to enter the data and press a Calculate button. The program must display the weighted average.

Problem 2
Write a method, reverseDigit, that takes an integer as a parameter and returns the number with its digits reversed. For example, the value of reverseDigit(12345) is 54321. Also, write a program to test your method.

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public class problem1 extends JFrame implements ActionListener{

    private JTextField [] testscore ;
    private JTextField [] weight ;
    private JLabel [] labels;
    private JButton calculate;
   
    public problem1() {
       super("Problem 1");
       setSize(400, 350);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       JPanel pane = new JPanel();
       GridLayout gl = new GridLayout(8, 3, 10, 10);
       pane.setLayout(gl);      
      
       testscore = new JTextField[6];
       weight = new JTextField[6];
       pane.add(new JLabel(" "));
       pane.add(new JLabel("Test score"));
       pane.add(new JLabel("Weight"));
       for (int i = 0; i < 6; i++) {
            pane.add(new JLabel(" data " + (i+1) + ""));
            testscore[i] = new JTextField("0");
            weight[i] = new JTextField("0");
            pane.add(testscore[i]);
            pane.add(weight[i]);
       }...
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