help

Using jGrasp and the Software Development Kit, write a program in response to the following prompt:

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.

Remember to follow proper form and design in your response.

 

 

 

 

 

 

this is what i came up with but get the errors

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import java.text.DecimalFormat;

import java.util.Scanner;

 

public class TestScores

extends JFrame

75 0.20

95 0.35

85 0.15

65 0.30

{

private JLabel blankoneL, blanktwoL, blankthreeL,scoreL, weightL, oneL, twoL, threeL, fourL, averageL;

private JTextField oneTF, twoTF, threeTF, fourTF, woneTF, wtwoTF, wthreeTF, wfourTF, averageTF;

private JButton calculateB,exitB;

private CalculateButtonHandler cbHandler;

private ExitButtonHandler ebHandler;

private static final int WIDTH =600;

private static final int HEIGHT=400;

public TestScores()

 

//Making labels for the GUI

 

{

blankoneL=new JLabel (“”);

blanktwoL=new JLabel(“”);

blankthreeL=new JLabel(“”);

scoreL=new JLabel (“Score”,SwingConstants.CENTER);

weightL=new JLabel (“weight”, SwingConstants.CENTER);

oneL=new JLabel(“Test score #1:”,SwingConstants.RIGHT);

twoL=new JLabel (“Test score #2:” ,SwingConstants.RIGHT);

threeL=new JLabel (“Test score #3:”,SwingConstants.RIGHT);

fourL=new JLabel (“Test score #4:”,SwingConstants.RIGHT);

averageL=new JLabel (“Test score average:” ,SwingConstants.RIGHT);

 

//Making user input fields

 

oneTF=new JTextField(5);

twoTF=new JTextField(5);

threeTF= new JTextField(5);

fourTF= new JTextField(5);

woneTF= new JTextField(5);

wtwoTF= new JTextField(5);

wthreeTF= new JTextField(5);

wfourTF= new JTextField(5);

averageTF= new JTextField(5);

 

//Making a CTA button to get the average

 

calculateB= new JButton(“Calculate”);

cbHandler=new CalculateButtonHandler();

calculateB.addActionListener(cbHandler);

 

//Making an exit button

 

exitB=new JButton(“Exit Program”);

ebHandler=new ExitButtonHandler();

exitB.addActionListener(ebHandler);

 

setTitle (“Weighted Average Test Scores”);

 

Container pane = getContentPane();

 

pane.setLayout(new GridLayout(7,3));

 

pane.add(blankoneL);

pane.add(scoreL);

 

pane.add (weightL);

pane.add (oneL);

pane.add (oneTF);

pane.add (woneTF);

 

pane.add (twoL);

pane.add (twoTF);

pane.add (wtwoTF);

 

pane.add (threeL);

pane.add (threeTF);

pane.add (wthreeTF);

 

pane.add (fourL);

pane.add (fourTF);

pane.add (wfourTF);

 

pane.add (averageL);

pane.add (averageTF);

pane.add (blanktwoL);

 

pane.add (calculateB);

pane.add (blankthreeL);

pane.add (exitB);

 

setSize(WIDTH,HEIGHT);

setVisible(true);

setDefaultCloseOperation(EXIT_ON_CLOSE);

 

}

 

private class CalculateButtonHandler implements ActionListener{

public void actionPerformed(ActionEvent e)

 

{

 

double one, wone, two,wtwo, three, wthree,four,wfour, ave;

DecimalFormat twoDigits=new DecimalFormat(“0.00”);

one=Double.parseDouble(oneTF.getText());

 

wone=Double.parseDouble(woneTF.getText());

 

two=Double.parseDouble(twoTF.getText());

 

wtwo=Double.parseDouble (wtwoTF.getText());

 

three=Double.parseDouble (threeTF.getText());

 

wthree=Double.parseDouble (wthreeTF.getText());

 

four=Double.parseDouble (fourTF.getText());

 

wfour=Double.parseDouble (wfourTF.getText());

 

ave=(one*wone+two*wtwo+three*wthree+four*wfour)/(wone+wtwo+wthree+wfour);

 

averageTF.setText(“”+twoDigits.format(ave));

}

 

}

 

private class ExitButtonHandler implements ActionListener {

 

public void actionPerformed(ActionEvent e) {

 

}

 

}

 

}

 

this is the error

 

—-jGRASP exec: javac -g TestScores.java

TestScores.java:14: error: ‘{‘ expected

extends JFrame

^

1 error

 

—-jGRASP wedge2: exit code for process is 1.

—-jGRASP: operation complete