我在 Dr. Java 中创建了一个项目，编译后可以自动转换为 Jar 文件，然后再转换为 Jar 文件，.exe但是我不断收到此错误：
Illegal class literal
当我尝试测试运行项目时，知道为什么会发生这种情况吗？
这是主要课程：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class CoolingTowerFrame extends JFrame
{
public JLabel testLabel = new JLabel("All Temperatures in (deg)F");
public JLabel testCalculationsLabel = new JLabel("");
public JPanel testPanel = new JPanel();
public JPanel textFieldPanel = new JPanel();
public JPanel flowRatePanel = new JPanel();
public JPanel wetBulbTempPanel = new JPanel();
public JPanel waterInTempPanel = new JPanel();
public JPanel waterOutTempPanel = new JPanel();
public JPanel buttonPanel = new JPanel();
public JTextField flowRateField = new JTextField(10);
public JTextField wetBulbTempField = new JTextField(10);
public JTextField waterInTempField = new JTextField(10);
public JTextField waterOutTempField = new JTextField(10);
public JLabel flowRateLabel = new JLabel();
public JLabel wetBulbTempLabel = new JLabel();
public JLabel waterInTempLabel = new JLabel();
public JLabel waterOutTempLabel = new JLabel();
public JButton submitButton = new JButton("Check Calculations");
public JButton clearButton = new JButton("Clear");
public JButton unknownWetBulbButton = new JButton("Unknown");
public JButton findButton = new JButton("Find Unit");
public int roundCoolingTons;
public int approach;
public int range;
public int wetBulbTemp;
public int flowRate;
public CoolingTowerFrame(String title, int frameWidth, int frameHeight)
{
super(title);
Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension dimensions = toolkit.getScreenSize();
int x = (dimensions.width - frameWidth)/2;
int y = (dimensions.height - frameHeight)/2;
setBounds(x, y, frameWidth, frameHeight);
submitButton.addActionListener(new ButtonListener());
clearButton.addActionListener(new ButtonListener());
unknownWetBulbButton.addActionListener(new ButtonListener());
findButton.addActionListener(new ButtonListener());
flowRateLabel.setFont(new Font("Arial", Font.BOLD, 12));
flowRateLabel.setText("Flow Rate (GPM) :");
flowRatePanel.add(flowRateLabel);
flowRatePanel.add(flowRateField);
textFieldPanel.add(flowRatePanel);
wetBulbTempLabel.setFont(new Font("Arial", Font.BOLD, 12));
wetBulbTempLabel.setText("Wet Bulb:");
wetBulbTempPanel.add(wetBulbTempLabel);
wetBulbTempPanel.add(wetBulbTempField);
wetBulbTempPanel.add(unknownWetBulbButton);
textFieldPanel.add(wetBulbTempPanel);
waterInTempLabel.setFont(new Font("Arial", Font.BOLD, 12));
waterInTempLabel.setText("Water In:");
waterInTempPanel.add(waterInTempLabel);
waterInTempPanel.add(waterInTempField);
textFieldPanel.add(waterInTempPanel);
waterOutTempLabel.setFont(new Font("Arial", Font.BOLD, 12));
waterOutTempLabel.setText("Water Out:");
waterOutTempPanel.add(waterOutTempLabel);
waterOutTempPanel.add(waterOutTempField);
textFieldPanel.add(waterOutTempPanel);
add(textFieldPanel, BorderLayout.CENTER);
buttonPanel.add(submitButton);
buttonPanel.add(clearButton);
buttonPanel.add(findButton);
add(buttonPanel, BorderLayout.SOUTH);
testPanel.add(testLabel);
testPanel.add(testCalculationsLabel);
add(testPanel, BorderLayout.NORTH);
}
public CoolingTowerFrame(String stringWetBulb)
{
super("Cooling Tower Selection Program");
Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension dimensions = toolkit.getScreenSize();
int x = (dimensions.width - 315)/2;
int y = (dimensions.height - 250)/2;
setBounds(x, y, 315, 250);
setVisible(true);
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
wetBulbTempField.setText(stringWetBulb);
wetBulbTempField.setEditable(false);
submitButton.addActionListener(new ButtonListener());
clearButton.addActionListener(new ButtonListener());
unknownWetBulbButton.addActionListener(new ButtonListener());
findButton.addActionListener(new ButtonListener());
flowRateLabel.setFont(new Font("Arial", Font.BOLD, 12));
flowRateLabel.setText("Flow Rate (GPM):");
flowRatePanel.add(flowRateLabel);
flowRatePanel.add(flowRateField);
textFieldPanel.add(flowRatePanel);
wetBulbTempLabel.setFont(new Font("Arial", Font.BOLD, 12));
wetBulbTempLabel.setText("Wet Bulb:");
wetBulbTempPanel.add(wetBulbTempLabel);
wetBulbTempPanel.add(wetBulbTempField);
wetBulbTempPanel.add(unknownWetBulbButton);
textFieldPanel.add(wetBulbTempPanel);
waterInTempLabel.setFont(new Font("Arial", Font.BOLD, 12));
waterInTempLabel.setText("Water In:");
waterInTempPanel.add(waterInTempLabel);
waterInTempPanel.add(waterInTempField);
textFieldPanel.add(waterInTempPanel);
waterOutTempLabel.setFont(new Font("Arial", Font.BOLD, 12));
waterOutTempLabel.setText("Water Out:");
waterOutTempPanel.add(waterOutTempLabel);
waterOutTempPanel.add(waterOutTempField);
textFieldPanel.add(waterOutTempPanel);
add(textFieldPanel, BorderLayout.CENTER);
buttonPanel.add(submitButton);
buttonPanel.add(clearButton);
buttonPanel.add(findButton);
add(buttonPanel, BorderLayout.SOUTH);
testPanel.add(testLabel);
testPanel.add(testCalculationsLabel);
add(testPanel, BorderLayout.NORTH);
}
private class ButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == submitButton)
{
try
{
flowRate = Integer.parseInt(flowRateField.getText());
wetBulbTemp = Integer.parseInt(wetBulbTempField.getText());
int waterInTemp = Integer.parseInt(waterInTempField.getText());
int waterOutTemp = Integer.parseInt(waterOutTempField.getText());
testLabel.setText("");
double coolingTons = calculateCoolingTons(flowRate, waterInTemp, waterOutTemp);
Double roundedTemp = new Double(coolingTons);
roundedTemp = Math.rint(roundedTemp);
roundCoolingTons = roundedTemp.intValue();
approach = calculateApproach(waterOutTemp, wetBulbTemp);
range = calculateRange(waterInTemp, waterOutTemp);
testCalculationsLabel.setText("Cooling Tons: " + roundCoolingTons + " Approach: " + approach + " Range: " + range);
}
catch(NumberFormatException ex)
{
testLabel.setText("Improper Imput");
testCalculationsLabel.setText("Unable to perform calculations");
}
}
else if (e.getSource() == findButton)
{
if ((roundCoolingTons == 0) && (approach == 0) && (range == 0))
{
testLabel.setText("Please Fill in Text Fields to Find Unit");
}
else
{
JFrame selectUnit = new WetBulbChart(flowRate, wetBulbTemp, roundCoolingTons, approach, range);
}
}
else if (e.getSource() == clearButton)
{
testLabel.setText("All Temperatures in (deg)F");
flowRateField.setText("");
wetBulbTempField.setText("");
wetBulbTempField.setEditable(true);
waterInTempField.setText("");
waterOutTempField.setText("");
testCalculationsLabel.setText("");
}
else
{
JFrame wbf1 = new WetBulbByLocationFrame1();
}
}
}
public static double calculateCoolingTons(int flowrate, int waterin, int waterout)
{
int differential = (waterin - waterout);
double tons = ((differential*flowrate)/30.00);
tons = Math.rint(tons);
return tons;
}
public static int calculateApproach(int waterout, int wetbulb)
{
int approach = (waterout - wetbulb);
return approach;
}
public static int calculateRange(int waterin, int waterout)
{
int range = (waterin - waterout);
return range;
}
public static void main(String []args)
{
JFrame frame = new CoolingTowerFrame("Cooling Tower Selection Program", 315, 250);
frame.setVisible(true);
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
这是我按下运行后的错误截图：
