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Ceci est mon code pour les deux classes de fichiers. Que dois-je ajouter/corriger pour que les variables puissent être transférées et imprimées dans l'écouteur d'action JFrame? L'erreur « Aucun champ « (la variable je dans l'auditeur d'action de la classe principale) » a été trouvé dans le type « Suivant »Comment obtenir des informations sur les variables d'une classe à une autre classe Action Listener?
import java.awt.*; //for Dimension
import javax.swing.*; //for GUI components
public class MortgageCalculator
{
public static void main (String[] args)
{
JFrame frame = new JFrame();
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.setSize (new Dimension (300, 250));
frame.setTitle ("Mortgage Calculator");
frame.getContentPane().setLayout (new BorderLayout());
frame.getContentPane().add (new JLabel (" Personal Information"), BorderLayout.NORTH);
JPanel centerPanel = new JPanel (new GridLayout (15, 1));
centerPanel.add (new JLabel ("Full Name:"));
JTextField nameField = new JTextField();
centerPanel.add (nameField);
centerPanel.add (new JLabel ("Your Age:"));
JTextField ageField = new JTextField();
centerPanel.add (ageField);
centerPanel.add (new JLabel ("Yearly Income:"));
JTextField incomeField = new JTextField();
centerPanel.add (incomeField);
centerPanel.add (new JLabel());
centerPanel.add (new JLabel (" Mortgage Information"));
centerPanel.add (new JLabel ("Price of Property:"));
JTextField priceField = new JTextField();
centerPanel.add (priceField);
centerPanel.add (new JLabel ("Down Payment:"));
JTextField downPayField = new JTextField();
centerPanel.add (downPayField);
centerPanel.add (new JLabel ("Interest Rate:"));
JTextField interestRateField = new JTextField();
centerPanel.add (interestRateField);
centerPanel.add (new JLabel ("Amortization Period (Years):"));
frame.getContentPane().add (centerPanel, BorderLayout.CENTER);
JPanel southPanel = new JPanel (new GridLayout (5, 2));
JButton amort20 = new JButton ("20");
southPanel.add (amort20);
JButton amort25 = new JButton ("25");
southPanel.add (amort25);
JButton amort30 = new JButton ("30");
southPanel.add (amort30);
southPanel.add (new JLabel ("Payment Option:"));
southPanel.add (new JLabel());
southPanel.add (new JLabel());
JButton paymentWeek = new JButton ("Weekly");
southPanel.add (paymentWeek);
JButton paymentBiweek = new JButton ("Biweekly");
southPanel.add (paymentBiweek);
JButton paymentMonth = new JButton ("Monthly");
southPanel.add (paymentMonth);
//To add a blank line in frame, added three blank JLabels because it is 3 horiontal for grid layout
southPanel.add (new JLabel());
southPanel.add (new JLabel());
southPanel.add (new JLabel());
southPanel.add (new JButton ("Clear Information"));
southPanel.add (new JLabel());
JButton nextButton = new JButton ("Next");
southPanel.add (nextButton);
frame.getContentPane().add (southPanel, BorderLayout.SOUTH);
frame.pack();
frame.setVisible (true);
nextButton.addActionListener (new Next());
//Gets the personal information from the text fields
int age, income, price, downPay, interestRate;
String name = nameField.getText();
String ageText = ageField.getText();
age = Integer.parseInt (ageText);
String incomeText = incomeField.getText();
income = Integer.parseInt (ageText);
//Gets the mortgage information from the text fields
String priceText = priceField.getText();
price = Integer.parseInt (ageText);
String downPayText = downPayField.getText();
downPay = Integer.parseInt (ageText);
String interestRateText = interestRateField.getText();
interestRate = Integer.parseInt (interestRateText);
}
}
Le ActionListener:
import java.awt.*; //for Dimension
import javax.swing.*; //for GUI components
import java.awt.event.*; //for MessageListener
public class Next implements ActionListener
{
public void actionPerformed (ActionEvent event)
{
//Output frame
JFrame frame2 = new JFrame();
frame2.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame2.setSize (new Dimension (300, 250));
frame2.setTitle ("Mortgage Calculator");
frame2.getContentPane().setLayout (new BorderLayout());
JPanel westPanel2 = new JPanel (new GridLayout (3, 1));
JLabel nameLabel = new JLabel ("Name: " + name);
westPanel2.add (nameLabel);
JLabel ageLabel = new JLabel ("Age: " + age);
westPanel2.add (ageLabel);
JLabel incomeLabel = new JLabel ("Yearly Income: " + income);
westPanel2.add (incomeLabel);
frame2.getContentPane().add (westPanel2, BorderLayout.WEST);
JPanel centerPanel2 = new JPanel (new GridLayout (3, 1));
JLabel priceLabel = new JLabel (" Price of property: " + price);
centerPanel2.add (priceLabel);
JLabel downPayLabel = new JLabel (" Down Payment: " + downPay);
centerPanel2.add (downPayLabel);
JLabel interestRateLabel = new JLabel (" Interest Rate: " + income);
centerPanel2.add (interestRateLabel);
frame2.getContentPane().add (centerPanel2, BorderLayout.CENTER);
frame2.pack();
frame2.setVisible (true);
}
}