[英]Debugging code I have with 2 classes and a JFrame that holds 4 JPanels
我正在尋求幫助來調試我編寫的這個程序，沒有錯誤，但目標是創建一個框架，其中包含三個面板，每個面板都有一個標題邊框。 我遇到了困難，因為我的提示要求我創建 2 個構造函數和 2 個類，所以當我在 main 中調用 DailySales 類時，我覺得它不包括另一個類。
所以基本上我怎樣才能讓面板顯示出來，同時仍然保留兩個類和兩個構造函數，以及如何為每個 JPanel 添加標題邊框，抱歉，我在 Oracle 教程中遇到了困難。
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class DailySales extends JPanel {
final int lPizzaPrice = 12;
final int mPizzaPrice = 9;
final int sPizzaPrice = 6;
final int bSticksPrice = 3;
final double tax = .06;
final int dailyOper = 1000;
String lPizza;
String mPizza;
String sPizza;
String bSticks;
int largePizza;
int mediumPizza;
int smallPizza;
int breadSticks;
int totalLargePizza;
int totalMediumPizza;
int totalSmallPizza;
int totalBreadSticks;
int totalSales;
double totalTax;
double netSales;
int operCost;
double profit;
private FlowLayout dailyFlow;
private Container container;
JLabel lPizzaLabel = new JLabel("Large Pizza");//creating labels
JLabel mPizzaLabel = new JLabel("Medium Pizza");
JLabel sPizzaLabel = new JLabel("Small Pizza");
JLabel bSticksLabel = new JLabel("Bread Sticks");
JLabel totalSalesLabel = new JLabel("Total Sales");
JLabel totalTaxLabel = new JLabel("Total Tax");
JLabel netSalesLabel = new JLabel("Net Sales");
JLabel dailyCostLabel = new JLabel("Daily Oper Cost");
JLabel profitLabel = new JLabel("Profit or Loss");
JTextField largeField = new JTextField(10);
JTextField mediumField = new JTextField(10);
JTextField smallField = new JTextField(10);
JTextField breadField = new JTextField(10);
JTextField totalLargeField = new JTextField(10);
JTextField totalMediumField = new JTextField(10);
JTextField totalSmallField = new JTextField(10);
JTextField totalBreadField = new JTextField(10);
JTextField totalSalesField = new JTextField(10);
JTextField totalTaxField = new JTextField(10);
JTextField netSalesField = new JTextField(10);
JTextField dailyCostField = new JTextField(10);
JTextField profitField = new JTextField(10);
JButton clearButton = new JButton("Clear Fields");//Creating buttons
JButton calculateButton = new JButton("Calculate");
JButton exitButton = new JButton("Exit");
JPanel subPanel1 = new JPanel();
JPanel subPanel2 = new JPanel();
JPanel subPanel3 = new JPanel();
JPanel top = new JPanel();
public class GUI extends JPanel {
public GUI() {
subPanel1.setLayout(dailyFlow);
subPanel1.add(lPizzaLabel, largeField);
subPanel1.add(mPizzaLabel, mediumField);
subPanel1.add(sPizzaLabel, smallField);
subPanel1.add(bSticksLabel, breadField);
subPanel1.setSize(100, 100);
subPanel2.setLayout(dailyFlow);
subPanel2.add(totalLargeField);
subPanel2.add(totalMediumField);
subPanel2.add(totalSmallField);
subPanel2.add(totalBreadField);
subPanel3.setLayout(dailyFlow);
subPanel3.add(totalSalesLabel, totalSalesField);
subPanel3.add(totalTaxLabel, totalTaxField);
subPanel3.add(netSalesLabel, netSalesField);
subPanel3.add(dailyCostLabel, dailyCostField);
subPanel3.add(profitLabel, profitField);
top.setBackground(Color.red);
JLabel title = new JLabel("Eve's Pizza Daily Sales");
title.setFont(new Font("Helvetica", 1, 14));
top.add(title);
totalSalesField.setEditable(false);//making total field uneditable
totalTaxField.setEditable(false);
netSalesField.setEditable(false);
dailyCostField.setEditable(false);
profitField.setEditable(false);
}
}
public DailySales() //creating a constructor
{
/**
* The constructor with all the layout informations and operators
*
*
* Also adding all labels, textfields, and buttons to frame. making the
* total field uneditable
*/
JFrame frame = new JFrame();
frame.add(subPanel1);
frame.add(subPanel2);
frame.add(subPanel3);
frame.add(top);
frame.setSize(600, 450);
frame.setVisible(true);
clearButton.addActionListener(new ActionListener() {//initial button removes all entered text
public void actionPerformed(ActionEvent e) {
largeField.setText("");
mediumField.setText("");
smallField.setText("");
breadField.setText("");
totalLargeField.setText("");
totalMediumField.setText("");
totalSmallField.setText("");
totalBreadField.setText("");
totalSalesField.setText("");
totalTaxField.setText("");
netSalesField.setText("");
dailyCostField.setText("");
profitField.setText("");
}
});
calculateButton.addActionListener(new ActionListener() {//update button calculates all the inputs and displays everything
public void actionPerformed(ActionEvent e) {
lPizza = largeField.getText();
mPizza = mediumField.getText();
sPizza = smallField.getText();
bSticks = breadField.getText();
largePizza = Integer.parseInt(lPizza);
mediumPizza = Integer.parseInt(mPizza);
smallPizza = Integer.parseInt(sPizza);
breadSticks = Integer.parseInt(bSticks);
totalLargePizza = (lPizzaPrice * largePizza);
totalMediumPizza = (mPizzaPrice * mediumPizza);
totalSmallPizza = (sPizzaPrice * smallPizza);
totalBreadSticks = (bSticksPrice * breadSticks);
totalLargeField.setText("" + totalLargePizza);
totalMediumField.setText("" + totalMediumPizza);
totalSmallField.setText("" + totalSmallPizza);
totalBreadField.setText("" + totalBreadSticks);
totalSales = (totalLargePizza + totalMediumPizza + totalSmallPizza + totalBreadSticks);
totalTax = (totalSales * tax);
netSales = (totalSales - totalTax);
profit = (netSales - dailyOper);
/**
* calculates total by adding all entered values if else
* statements for different situations that calculate the
* different between total and diet
*/
if (profit > 0) {
profitLabel.setText("Profit of ");
} else if (profit < 0) {
profitLabel.setText("Loss of ");
} else if (profit == 0) {
profitLabel.setText("No profit or loss ");
}
if (largePizza < 0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
} else if (mediumPizza < 0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
} else if (smallPizza < 0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
} else if (breadSticks < 0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
}
}
});
exitButton.addActionListener(new ActionListener() {//close button closes the program when clicked on
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {
new DailySales();
}
}
您仍然可以做很多事情來改善這一點，但這是有效的。
public class DailySales extends JPanel {
final int lPizzaPrice = 12, mPizzaPrice = 9, sPizzaPrice = 6, bSticksPrice = 3;
final double tax = .06;
final int dailyOper = 1000;
String lPizza, mPizza, sPizza, bSticks;
int largePizza, mediumPizza, smallPizza, breadSticks, totalLargePizza,
totalMediumPizza, totalSmallPizza, totalBreadSticks;
int totalSales;
double totalTax;
double netSales;
int operCost;
double profit;
JLabel lPizzaLabel = new JLabel("Large Pizza");
JLabel mPizzaLabel = new JLabel("Medium Pizza");
JLabel sPizzaLabel = new JLabel("Small Pizza");
JLabel bSticksLabel = new JLabel("Bread Sticks");
JLabel totalSalesLabel = new JLabel("Total Sales");
JLabel totalTaxLabel = new JLabel("Total Tax");
JLabel netSalesLabel = new JLabel("Net Sales");
JLabel dailyCostLabel = new JLabel("Daily Oper Cost");
JLabel profitLabel = new JLabel("Profit or Loss");
JTextField largeField = new JTextField(10);
JTextField mediumField = new JTextField(10);
JTextField smallField = new JTextField(10);
JTextField breadField = new JTextField(10);
JTextField totalLargeField = new JTextField(10);
JTextField totalMediumField = new JTextField(10);
JTextField totalSmallField = new JTextField(10);
JTextField totalBreadField = new JTextField(10);
JTextField totalSalesField = new JTextField(10);
JTextField totalTaxField = new JTextField(10);
JTextField netSalesField = new JTextField(10);
JTextField dailyCostField = new JTextField(10);
JTextField profitField = new JTextField(10);
JButton clearButton = new JButton("Clear Fields");// Creating buttons
JButton calculateButton = new JButton("Calculate");
JButton exitButton = new JButton("Exit");
JPanel subPanel1 = new JPanel();
JPanel subPanel2 = new JPanel();
JPanel subPanel3 = new JPanel();
JPanel top = new JPanel();
public class GUI extends JPanel {
public GUI() {
subPanel1.setLayout(new GridLayout(4, 2));
subPanel1.add(lPizzaLabel);
subPanel1.add(largeField);
subPanel1.add(mPizzaLabel);
subPanel1.add(mediumField);
subPanel1.add(sPizzaLabel);
subPanel1.add(smallField);
subPanel1.add(bSticksLabel);
subPanel1.add(breadField);
subPanel1.setBorder(BorderFactory.createTitledBorder("Panel 1"));
// subPanel2.setLayout(new BoxLayout(subPanel2, BoxLayout.Y_AXIS)); // Same as next line
subPanel2.setLayout(new GridLayout(4, 1));
subPanel2.add(totalLargeField);
subPanel2.add(totalMediumField);
subPanel2.add(totalSmallField);
subPanel2.add(totalBreadField);
subPanel2.setBorder(BorderFactory.createTitledBorder("Panel 2"));
subPanel3.setLayout(new GridLayout(5, 2));
subPanel3.add(totalSalesLabel);
subPanel3.add(totalSalesField);
subPanel3.add(totalTaxLabel);
subPanel3.add(totalTaxField);
subPanel3.add(netSalesLabel);
subPanel3.add(netSalesField);
subPanel3.add(dailyCostLabel);
subPanel3.add(dailyCostField);
subPanel3.add(profitLabel);
subPanel3.add(profitField);
JLabel title = new JLabel("Eve's Pizza Daily Sales");
title.setFont(new Font("Helvetica", 1, 14));
top.add(title);
top.setBackground(Color.YELLOW);
totalSalesField.setEditable(false);// making total field uneditable
totalTaxField.setEditable(false);
netSalesField.setEditable(false);
dailyCostField.setEditable(false);
profitField.setEditable(false);
}
}
public DailySales() // creating a constructor
{
/**
* The constructor with all the layout informations and operators Also
* adding all labels, textfields, and buttons to frame. making the total
* field uneditable
*/
new GUI();
JPanel mainPanel = new JPanel(new GridLayout(2, 2));
mainPanel.add(subPanel1);
mainPanel.add(subPanel2);
mainPanel.add(subPanel3);
JPanel buttonPanel = new JPanel();
buttonPanel.add(clearButton);
buttonPanel.add(calculateButton);
buttonPanel.add(exitButton);
JFrame frame = new JFrame();
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(top, BorderLayout.PAGE_START);
frame.getContentPane().add(mainPanel, BorderLayout.CENTER);
frame.getContentPane().add(buttonPanel, BorderLayout.PAGE_END);
frame.setSize(600, 450);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
clearButton.addActionListener(new ActionListener() {// initial button
// removes all
// entered text
public void actionPerformed(ActionEvent e) {
largeField.setText("");
mediumField.setText("");
smallField.setText("");
breadField.setText("");
totalLargeField.setText("");
totalMediumField.setText("");
totalSmallField.setText("");
totalBreadField.setText("");
totalSalesField.setText("");
totalTaxField.setText("");
netSalesField.setText("");
dailyCostField.setText("");
profitField.setText("");
}
});
calculateButton.addActionListener(new ActionListener() {// update button
// calculates
// all the
// inputs and
// displays
// everything
public void actionPerformed(ActionEvent e) {
lPizza = largeField.getText();
mPizza = mediumField.getText();
sPizza = smallField.getText();
bSticks = breadField.getText();
largePizza = Integer.parseInt(lPizza);
mediumPizza = Integer.parseInt(mPizza);
smallPizza = Integer.parseInt(sPizza);
breadSticks = Integer.parseInt(bSticks);
totalLargePizza = (lPizzaPrice*largePizza);
totalMediumPizza = (mPizzaPrice*mediumPizza);
totalSmallPizza = (sPizzaPrice*smallPizza);
totalBreadSticks = (bSticksPrice*breadSticks);
totalLargeField.setText(""+totalLargePizza);
totalMediumField.setText(""+totalMediumPizza);
totalSmallField.setText(""+totalSmallPizza);
totalBreadField.setText(""+totalBreadSticks);
totalSales = (totalLargePizza+totalMediumPizza+totalSmallPizza+totalBreadSticks);
totalTax = (totalSales*tax);
netSales = (totalSales-totalTax);
profit = (netSales-dailyOper);
/**
* calculates total by adding all entered values if else
* statements for different situations that calculate the
* different between total and diet
*/
if (profit>0) {
profitLabel.setText("Profit of ");
} else if (profit<0) {
profitLabel.setText("Loss of ");
} else if (profit==0) {
profitLabel.setText("No profit or loss ");
}
if (largePizza<0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
} else if (mediumPizza<0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
} else if (smallPizza<0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
} else if (breadSticks<0) {
JOptionPane.showMessageDialog(null, "Quantity muist be >=0");
}
}
});
exitButton.addActionListener(new ActionListener() {// close button
// closes the
// program when
// clicked on
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {
new DailySales();
}
}
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