英文:
How do I create a JButton solely on one pane that prints "Hello
问题
import javax.swing.*;
import java.awt.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.event.ActionEvent; // Import ActionEvent
import java.awt.event.ActionListener; // Import ActionListener
public class SwingDemo extends JFrame {
public static void main(String args[]) {
JFrame frame = new JFrame("Encryption/Decryption Software");
JTabbedPane tabbedPane = new JTabbedPane();
JPanel panel1, panel2;
panel1 = new JPanel();
panel2 = new JPanel();
tabbedPane.setBackground(Color.blue);
tabbedPane.setForeground(Color.white);
tabbedPane.addTab("Encryption", panel1);
tabbedPane.addTab("Decryption ", panel2);
frame.add(tabbedPane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(200, 170, 500, 250);
frame.setVisible(true);
tabbedPane.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
if (tabbedPane.getSelectedIndex() == 0) {
panel1.removeAll();
panel1.setLayout(null);
JLabel initial_text = new JLabel("Enter text to be encrypted:");
JLabel final_text = new JLabel("Final text:");
JLabel key = new JLabel("Key:");
JTextField text_field = new JTextField(100);
JTextField key_field = new JTextField(100);
panel1.add(initial_text);
panel1.add(final_text);
panel1.add(key);
panel1.add(text_field);
panel1.add(key_field);
initial_text.setBounds(10, 20, 300, 50);
final_text.setBounds(10, 150, 600, 50);
key.setBounds(10, 58, 300, 50);
text_field.setBounds(178, 30, 230, 30);
key_field.setBounds(38, 72, 36, 25);
// Add ActionListener to create JButton
JButton button = new JButton("Press Me");
panel1.add(button);
button.setBounds(10, 100, 100, 30);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Hello");
}
});
}
}
});
}
}
英文:
Every time I try to do this, it gives me an error that "Change Listener cannot be converted to Action Listener" and even if I implement ActionListener to the class... it still gives me another error
Is there a way to create a JButton only on the pane "Encryption" that when pressed prints "Hello"
This is my code:
import javax.swing.*;
import java.awt.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class SwingDemo extends JFrame {
public static void main(String args[]) {
JFrame frame = new JFrame("Encryption/Decryption Software");
JTabbedPane tabbedPane = new JTabbedPane();
JPanel panel1, panel2;
panel1 = new JPanel();
panel2 = new JPanel();
tabbedPane.setBackground(Color.blue);
tabbedPane.setForeground(Color.white);
tabbedPane.addTab("Encryption", panel1);
tabbedPane.addTab("Decryption ", panel2);
frame.add(tabbedPane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(200,170, 500,250);
frame.setVisible(true);
tabbedPane.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
if(tabbedPane.getSelectedIndex() == 0){
panel1.removeAll();
panel1.setLayout(null);
JLabel initial_text = new JLabel("Enter text to be encrypted:");
JLabel final_text = new JLabel("Final text:");
JLabel key = new JLabel("Key:");
JTextField text_field = new JTextField(100);
JTextField key_field = new JTextField(100);
panel1.add(initial_text);
panel1.add(final_text);
panel1.add(key);
panel1.add(text_field);
panel1.add(key_field);
initial_text.setBounds(10, 20, 300, 50);
final_text.setBounds(10, 150, 600, 50);
key.setBounds(10, 58, 300, 50);
text_field.setBounds(178, 30, 230, 30);
key_field.setBounds(38, 72, 36, 25);
}
}
});
}
}
答案1
得分: 0
要检测点击，您需要添加一个MouseListener，而不是一个ChangeListener。
像这样：
import java.awt.Color;
import javax.swing.*;
import java.awt.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
public class SwingDemo extends JFrame {
public static void main(String args[]) {
JFrame frame = new JFrame("Encryption/Decryption Software");
JTabbedPane tabbedPane = new JTabbedPane();
JPanel panel1, panel2;
panel1 = new JPanel();
panel2 = new JPanel();
tabbedPane.setBackground(Color.blue);
tabbedPane.setForeground(Color.white);
tabbedPane.addTab("Encryption", panel1);
tabbedPane.addTab("Decryption", panel2);
frame.add(tabbedPane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(200, 170, 500, 250);
frame.setVisible(true);
tabbedPane.addMouseListener(new MouseListener() {
@Override
public void mouseClicked(MouseEvent e) {
System.out.println("Hello");
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
});
}
}
英文:
to detect a click you need to add an MouseListener no a ChangeListener
Like this
import java.awt.Color;
import javax.swing.*;
import java.awt.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
public class SwingDemo extends JFrame {
public static void main(String args[]) {
JFrame frame = new JFrame("Encryption/Decryption Software");
JFrame frame = new JFrame("Encryption/Decryption Software");
JTabbedPane tabbedPane = new JTabbedPane();
JPanel panel1, panel2;
panel1 = new JPanel();
panel2 = new JPanel();
tabbedPane.setBackground(Color.blue);
tabbedPane.setForeground(Color.white);
tabbedPane.addTab("Encryption", panel1);
tabbedPane.addTab("Decryption ", panel2);
frame.add(tabbedPane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(200, 170, 500, 250);
frame.setVisible(true);
tabbedPane.addMouseListener(new MouseListener() {
@Override
public void mouseClicked(MouseEvent e) {
System.out.println("Hello");
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
});
}
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