准确地说,我有 4 节课。但更重要的是,首先显示它的类称为“MultiplePanels”。 这个类(MultiplePanels)有2个按钮,第一个“Memoreaza”链接到类Frame。运行良好。 (如果需要的话,我也可以上一个类)。 第二个类“FileWriterUsingJFrame”也与前一个类一样链接。但每次我尝试做某事时都会出现任何类型的错误。
我做错了什么?我已经尝试了很多来自 YT 和这里的教程。 抱歉,我是 java-swing 方面的新手。 //另外,我尝试从“FileWriterUsingJFrame”类中删除“throw new...”注释,因为我发现这可能是问题所在。但事实并非如此……
非常感谢!
这是 MultiplePanels 类
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
public class MultiplePanels extends JFrame {
public MultiplePanels() {
GridLayout g1=new GridLayout();
g1.setRows(1);
setLayout(g1);
setTitle("My Gui");
setSize(600, 200);
JButton button = new JButton("Memoreaza");
JButton button2 = new JButton("Inregistreaza");
JPanel panel = new JPanel();
panel.add(button);
panel.add(button2);
button.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e)
{
try {
Frame frame=new Frame();
frame.setVisible(true);
} catch (FileNotFoundException ex) {
Logger.getLogger(MultiplePanels.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
button2.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ea)
{
FileWriterUsingJFrame frame1=new FileWriterUsingJFrame();
frame1.setVisible(true);
}
});
add(button);
add(button2);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
}
这是我的“FileWriterUsingJFrame”类。
import java.awt.Button;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Locale;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextArea;
public class FileWriterUsingJFrame implements ActionListener{
JFrame window = new JFrame("Hotel Ibis");
JTextArea area = new JTextArea();
private static String[] message = {"1", "2", "3", "4", "5"};
JComboBox box = new JComboBox(message);
JTextField userNameTextField = new JTextField();
JTextField passwordTextField = new JTextField();
JTextField password2TextField = new JTextField();
JTextField password3TextField = new JTextField();
JTextField password4TextField = new JTextField();
JTextField password5TextField = new JTextField();
JTextField password6TextField = new JTextField();
JLabel userNameLabel = new JLabel ("Nume");
JLabel passwordLabel = new JLabel ("CI || Serie");
JLabel password2Label = new JLabel ("Prenume");
JLabel password3Label = new JLabel ("Nr Persoane");
JLabel password4Label = new JLabel ("Data sosire");
JLabel password5Label = new JLabel ("Data plecare");
JLabel password6Label = new JLabel ("Nr camere inchiriate");
JButton signUpButton = new JButton("Inregistreaza");
JButton generate = new JButton ("factura");
JLabel blank=new JLabel();
FileWriter fileWriter;
FileWriterUsingJFrame(){
GridLayout g1=new GridLayout();
g1.setColumns(3);
g1.setRows(10);
window.setLayout(g1);
signUpButton.addActionListener(this);
generate.addActionListener(this);
window.add(userNameLabel);
window.add(userNameTextField);
window.add(passwordLabel);
window.add(passwordTextField);
window.add(password2Label);
window.add(password2TextField);
window.add(password3Label);
window.add(password3TextField);
window.add(password4Label);
window.add(password4TextField);
window.add(password5Label);
window.add(password5TextField);
window.add(password6Label);
window.add(password6TextField);
window.add(blank);
window.add(box);
window.add(blank);
window.add(signUpButton);
window.add(generate);
box.setSelectedIndex(0);
box.addActionListener(box);
window.setSize(400,300);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setVisible(true);
}
FileWriterUsingJFrame(JButton b) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void actionPerformed(ActionEvent ea) {
if(ea.getActionCommand() == signUpButton.getActionCommand())
{
try
{
fileWriter = new FileWriter("D:/kek.txt", true);
fileWriter.write(userNameLabel.getText() + " : " +userNameTextField.getText()+ " " + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(passwordLabel.getText() + " : " +passwordTextField.getText() + " " + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(password2Label.getText() + " : " +password2TextField.getText()+ " " + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(password3Label.getText() + " : " +password3TextField.getText() + " " + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(password4Label.getText() + " : " +password4TextField.getText() + " " + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(password5Label.getText() + " : " +password5TextField.getText() + " " + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(password6Label.getText() + " : " +password6TextField.getText() + " " + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write( " etajul" + "" + "" + box.getSelectedItem() + "" + " " + " " + " ");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write(System.getProperty("line.separator"));
fileWriter.close();
JOptionPane.showMessageDialog(null, "Informatii trecute cu succes!");
}catch(Exception e){JOptionPane.showMessageDialog(null, e+"");}
}
}
private void password6TextFieldPressed(final java.awt.event.KeyEvent event)
{
int key = event.getKeyCode();
if ((key >= event.VK_0 && key <= event.VK_9)
|| (key >= event.VK_NUMPAD0 && key <= event.VK_NUMPAD9)
|| key == event.VK_BACK_SPACE) {
this.password6TextField.setEditable(true);
this.password6TextField.setBackground(Color.GREEN);
} else {
this.password6TextField.setEditable(false);
this.password6TextField.setBackground(Color.RED);
}
}
void setVisible(boolean b) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
public static void main(String[] args) throws FileNotFoundException{ {
FileWriterUsingJFrame fwj = new FileWriterUsingJFrame();
}}
}
最佳答案
只是提示,不是答案。
setVisible() 是 JFrame 的方法,因此仅当您有 obj 时才有效。 JFrame 类型 (该方法在 JFrame 中继承自 Window )。这就是为什么不编译)
如何扩展一个对象?以及其他调整
public class FileWriterUsingJFrame extends JFrame implements ActionListener
{
//now your class is a JFrame having all methods from including setVisible()
//as you did on Multiplepannel
//remove line
//JFrame window = new JFrame("Hotel Ibis");
//add line in constructor `FileWriterUsingJFrame()`
setTitle("Hotel Ibis");
//use (this) instead of (window) : (this) is the current object
//since you wanted FileWriterUsingJFrame to be display and not a nested class from
//window.add(userNameLabel); should be
this.add(userNameLabel);
// work also even without this, since you refer your current obj
//add(userNameLabel);
}
删除public static void main(String[] args)
,因为您在单击按钮2时创建了框架表单Multipannel
这些应该修复您的代码以编译并在单击时显示框架
(如果 FileWriterUsingJFrame
正在做应该做的事情,那就是另一个故事了)
希望我的提示可以帮助您更正您的代码。
关于java - 多个面板 - 如何将按钮从一个类链接到另一个类?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54382736/