Adding a action listener to button
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This document shows how to add an action listener to a button in Java. It imports necessary classes like JButton and ActionListener. It creates a JFrame with a button that displays a message dialog when clicked. The button is given an action listener that calls showMessageDialog when the button's actionPerformed method is triggered. The button is added to a panel and frame for display.
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![Adding a action listener to button
import javax.swing.JButton;
import javax.swing.JFrame;
import java.awt.event.ActionListener;
import java.awt.Component;
import java.awt.event.ActionEvent;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class action_listner_implementation extends JFrame {
action_listner_implementation()
{ setSize(200, 200);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton button1 = new JButton("Message dialog");
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog((Component) e.getSource(), "Thank
you!");}});
JPanel jp=new JPanel();
jp.add(button1);
getContentPane().add(jp);
}
public static void main(String[] args) {
action_listner_implementation a=new action_listner_implementation();
a.setVisible(true);
}
}](https://image.slidesharecdn.com/addingaactionlistenertobutton-160615122608/85/Adding-a-action-listener-to-button-1-320.jpg)
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Similar to Adding a action listener to button
package buttongui; import static com.sun.deploy.config.JREInf.pdf
package buttongui;
import static com.sun.deploy.config.JREInfo.clear;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class ButtonGUI extends Application implements EventHandler {
@Override
public void start(Stage primaryStage) {
btn.setText(\"Find\");
btn.setOnAction(this);
btn1.setText(\"Clear\");
btn1.setOnAction(this);
btn2.setText(\"Exit\");
btn2.setOnAction(this);
FlowPane flow = new FlowPane();
flow.getChildren().addAll(btn,btn1,btn2);
BorderPane border = new BorderPane();
border.setCenter(flow);
Scene scene = new Scene(border, 300,250);
primaryStage.setTitle(\"ButtonGUI\");
primaryStage.setScene(scene);
primaryStage.show();
}
@Override
public void handle(ActionEvent event) {
String tx =\"Hello world\";
System.out.println(tx);
if(btn2 == event.getSource()){
System.out.println(\"Exit Pressed\");
System.exit(0);
}
}
public static void main(String[] args)throws Exception {
launch(args);
}
}
Simple Exit & Clear Events) Add the Exit Event to your ButtonsGUI. Make it so that when the
user clicks on the Exit button, the application ends. Add the Clear Event to your ButtonsGUI.
Make it so that when the user clicks on the Clear button, the Text on all the Buttons is cleared.
please solve the clear button so that when the user clicks on the Clear button, the Text on all the
Buttons is cleared. thanks
Solution
Follow below steps to Add the Exit Event to your Buttons GUI:
1. Right Click on the Exit button and choose Events --> Action --> ActionPerformed.
2. The IDE will automatically add an ActionListener to the Exit button and generate a handler
method for handling the listener\'s actionPerformed method.
3. The IDE will open up the Source Code window and scroll to where you implement the action
you want the button to do when the button is pressed.
4. Add code for what we want the Exit Button to do. You will have to type System.exit(0);
5. Your final Exit button code should look like this:
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt)
{
System.exit(0);
}
Follow below steps to Add the Clear Event to your Buttons GUI:
In below example the text in two of our jTextFields will clear, it is overwriting the existing Text
with a blank.
1. Click on the Design tab at the top of your work area to go back to the Form Design
2. Right Click on the Clear button (jButton1). From the pop-up menu select Events --> Action --
> ActionPerformed.
3. Your final source code will be:
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)
{
jTextField1.setText(\"\");
jTextField2.setText(\"\");
}
Note: You can add as many jTextField depending upon number of buttons y.
Chat application in java using swing and socket programming.
Local lan based Chat application in java using swing and socket programming.
correct the error import javaxswingJFrame import javaxs.pdf
correct the error?
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.FileWriter;
import java.io.IOException;
import java.io.File;
import java.util.Scanner;
public class Form implements ActionListener{
private static JLabel userLabel;
private static JTextField userText;
private static JLabel PasswordLabel;
private static JPasswordField passwordLabel;
private static JButton button;
private static JLabel success;
public static void main(String[] args){
JPanel panel=new JPanel();
JFrame frame=new JFrame();
frame.setSize(350,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.add(panel);
panel.setLayout(null);
userLabel=new JLabel("UserName");
userLabel.setBounds(10,20,80,25);
panel.add(userLabel);
userText=new JTextField(20);
userText.setBounds(100,20,165,25);
panel.add(userText);
PasswordLabel=new JLabel("Password");
PasswordLabel.setBounds(10,50,80,25);
panel.add(PasswordLabel);
passwordLabel=new JPasswordField(20);
passwordLabel.setBounds(100,20,165,25);
panel.add(passwordLabel);
button=new JButton("Login");
button.setBounds(10,80,80,25);
button.addActionListener(new Login());
panel.add(button);
success=new JLabel(" ");
success.setBounds(10,110,300,25);
panel.add(success);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e){
String user=userText.getText();
String password=passwordText.getText();
System.out.printin(user+" , "+password);
if(user.equals("alex")&& password.equals("aleeexx")){
success.setText("Login successful!");
}
}
}
}
}
public class Form implements ActionListener{
private static JLabel nameLabel;
private static JTextField nameText;
private static JLabel ageLabel;
private static JTextField ageText;
private static JLabel occupationLabel;
private static JTextField occupationText;
private static JLabel salaryLabel;
private static JTextField salaryText;
private static JButton submitButton;
private static JLabel successLabel;
public static void main(String[] args){
JPanel panel=new JPanel();
JFrame frame=new JFrame();
frame.setSize(400,300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.add(panel);
panel.setLayout(null);
nameLabel=new JLabel("Name:");
nameLabel.setBounds(10,20,80,25);
panel.add(nameLabel);
nameText=new JTextField(20);
nameText.setBounds(100,20,165,25);
panel.add(nameText);
ageLabel=new JLabel("Age:");
ageLabel.setBounds(10,50,80,25);
panel.add(ageLabel);
ageText=new JTextField(20);
ageText.setBounds(100,50,165,25);
panel.add(ageText);
occupationLabel=new JLabel("Occupation:");
occupationLabel.setBounds(10,80,80,25);
panel.add(occupationLabel);
occupationText=new JTextField(20);
occupationText.setBounds(100,80,165,25);
panel.add(occupationText);
salaryLabel=new JLabel("Salary:");
salaryLabel.setBounds(10,110,80,.
import javax.swing.; import java.awt.; import java.awt.event..pdf
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
public class convertTemperature extends JApplet implements ActionListener {
JTextField inputField;
JLabel label;
JRadioButton celcius, fahrenheit;
public void init(){
Container contain = getContentPane();
contain.setLayout (new FlowLayout());
inputField = new JTextField(\"\",10);
contain.add(inputField);
celcius= new JRadioButton (\"to Celcius\", true);
contain.add(celcius);
fahrenheit = new JRadioButton(\"to fahrenheit\", false);
contain.add(fahrenheit);
ButtonGroup selection = new ButtonGroup();
selection.add(celcius);
selection.add(fahrenheit);
JButton button1 = new JButton (\"Show Result\");
button1.addActionListener(this);
contain.add(button1);
label= new JLabel (\"Enter temperature and choose an option\");
contain.add(label);
}
public void actionPerformed(ActionEvent e) {
DecimalFormat df = new DecimalFormat (\"#.##\");
double input = Double.parseDouble(inputField.getText());
double convertedTemp = 0.0;
if (celcius.isSelected())
convertedTemp = ((5.0/9.0)*(input - 32.0));
if (fahrenheit.isSelected())
convertedTemp = ((9.0/5.0)*(input + 32.0));
label.setText(String.valueOf(df.format(convertedTemp)));
}
}
Solution
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
public class convertTemperature extends JApplet implements ActionListener {
JTextField inputField;
JLabel label;
JRadioButton celcius, fahrenheit;
public void init(){
Container contain = getContentPane();
contain.setLayout (new FlowLayout());
inputField = new JTextField(\"\",10);
contain.add(inputField);
celcius= new JRadioButton (\"to Celcius\", true);
contain.add(celcius);
fahrenheit = new JRadioButton(\"to fahrenheit\", false);
contain.add(fahrenheit);
ButtonGroup selection = new ButtonGroup();
selection.add(celcius);
selection.add(fahrenheit);
JButton button1 = new JButton (\"Show Result\");
button1.addActionListener(this);
contain.add(button1);
label= new JLabel (\"Enter temperature and choose an option\");
contain.add(label);
}
public void actionPerformed(ActionEvent e) {
DecimalFormat df = new DecimalFormat (\"#.##\");
double input = Double.parseDouble(inputField.getText());
double convertedTemp = 0.0;
if (celcius.isSelected())
convertedTemp = ((5.0/9.0)*(input - 32.0));
if (fahrenheit.isSelected())
convertedTemp = ((9.0/5.0)*(input + 32.0));
label.setText(String.valueOf(df.format(convertedTemp)));
}
}.
correct the error and add code same in the pic import jav.pdf
correct the error and add code same in the pic?
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class Login implements ActionListener{
private static JLabel userLabel;
private static JTextField userText;
private static JLabel PasswordLabel;
private static JPasswordField passwordLabel;
private static JButton button;
private static JLabel success;
public static void main(String[] args){
JPanel panel=new JPanel();
JFrame frame=new JFrame();
frame.setSize(350,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.add(panel);
panel.setLayout(null);
userLable=new JLabel("UserName");
userLabel.setBounds(10,20,80,25);
panel.add(userLabel);
userText=new JTextField(20);
userText.setBounds(100,20,165,25);
panel.add(userText);
seclable=new JLabel("Password");
seclabe.setBounds(10,50,80,25);
panel.add(seclabel);
PasswordText=new JPasswordField(20);
PasswordText.setBounders(100,20,165,25);
panel.add(PasswordText);
button=new JButton("Login");
button.setBounds(10,80,80,25);
button.addActionListener(new Login());
panel.add(button);
success=new JLabel(" ");
success.setBounds(10,110,300,25);
panel.add(success);
frame.setVisible(true);
public void actionPerformed(ActionEvent e){
String user=userText.getText();
String password=passwordText.getText();
System.out.printin(user+" , "+password);
if(user.equals("ALEX")&& password.equals("allleex")){
success.setText("Login successful!");
}
}
}
}
}
}
Write and implement a program using JAVA, with a GUI that looks like the one shown below, if the
user clicks on submit button, store the fields in formfile.text and display the data from file into form..
I am getting a syntax error. I cant seem to find whats causing t.pdf
I am getting a syntax error. I can\'t seem to find what\'s causing this progrm even though I correct
what it\'s asking me to do. It seems to add even more errors.
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
public class GUI extends JFrame {
// create required GUI radios, labels, textfields and buttons
private JRadioButton iterative;
private JRadioButton recursive;
private JLabel entern;
private JLabel result;
private JLabel efficiency;
private JTextField t1;
private JTextField t2;
private JTextField t3;
private JButton compute;
private ButtonGroup radios = new ButtonGroup();
private ButtonGroup candidates = new ButtonGroup();
// create constructor for GUI
public GUI(){
super(\"Project 3\");
setLayout (new GridLayout(6,2));
setSize(275,250);
// initializing buttons and etc and adding them
iterative = new JRadioButton(\"Iterative\");
add(iterative);
recursive = new JRadioButton(\"Recursive\");
add(recursive);
// add radiobuttons to group so only one selection is possible
radios.add(iterative);
radios.add(recursive);
entern = new JLabel(\"Enter n:\");
add(entern);
result = new JLabel(\"Result:\");
add(result);
efficiency = new JLabel(\"Efficiency:\");
add(efficiency);
t1 = new JTextField();
add(t1);
compute = new JButton(\"Compute\");
add(compute);
t2 = new JTextField();
add(t2);
t3 = new JTextField();
add(t3);
/*
thehandler handler = new thehandler();
iterative.addActionListener(handler);
recursive.addActionListener(handler);
compute.addActionListener(handler);
****************************/
compute.addActionListener(new ActionListener (){
public void actionPerformed(ActionEvent b){
computeactionPerformed(b);
private void computeactionPerformed(ActionEvent b){
if ((iterative.isSelected(true))){
JOptionPane.showMessageDialog(null,\"you chose iterative\");
}
else if (recursive.isSelected(true)){
JOptionPane.showMessageDialog(null,\"you chose recursive\");
}
}
}
});
// create sub-panel for radio buttons
JPanel radioPanel = new JPanel();
radioPanel.add(iterative);
radioPanel.add(recursive);
/*
class thehandler implements ActionListener{
public void actionPerformed(ActionEvent e) {
if(e.getSource()==iterative && e.getSource()==compute){
System.out.println(\"you chose iterative\");
}
else if(e.getSource()==recursive && e.getSource()==compute){
System.out.println(\"you chose recursive\");
}
}
}
******************************/
}
public static void main(String[]args){
GUI object = new GUI();
object.setVisible(true);
object.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
Solution
I have Change in code . No it\'s working without any compliantion error.
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.
PLEASE HELP ME !!IT IS Due Tonight ;(!i have to submit it before.pdf
PLEASE HELP ME !!
IT IS Due Tonight ;(!
i have to submit it before 12 palzz help me :\"\"(
How can I make the add button and remove button initialize button work?
For the buttons should add and remove to the JTextArea and JList.
when you write you use the JTextField to add or remove what you write in the JTextArea and
JList.
For the initialize, the button should initialize the text once.
Ihave three class.
this what I code so far:
import javax.swing.JFrame;
import javax.swing.JTextField;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.Image;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JFileChooser;
import java.awt.Insets;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.SwingConstants;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.ImageIcon;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.logging.Handler;
import java.awt.event.ActionEvent;
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import java.awt.Component;
import javax.swing.ButtonGroup;
import javax.swing.DropMode;
import javax.swing.border.EtchedBorder;
import javax.swing.border.LineBorder;
import javax.swing.border.MatteBorder;
import javax.swing.border.TitledBorder;
import javax.swing.UIManager;
import java.awt.FlowLayout;
public class Schedule extends JFrame implements ListSelectionListener, ActionListener {
private ScheduleTextArea STArea;
private ScheduleButton SButton;
private JRadioButtonMenuItem BRed;
private JRadioButtonMenuItem BBlue;
private JRadioButtonMenuItem BGreen;
private JRadioButtonMenuItem BYellow;
private JPanel cntrolPanel;
public static void main(String[] args){
Schedule S= new Schedule();
S.setVisible(true);
}
public Schedule() {
setTitle(\"Student schedule\");
setSize(800,700);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getContentPane().setLayout(new GridLayout(0, 1, 0, 0));
createMenuBar();
cntrolPanel= new JPanel();
cntrolPanel.setBorder(new MatteBorder(3, 3, 3, 3, (Color) Color.GRAY));
getContentPane().add(cntrolPanel);
cntrolPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
STArea = new ScheduleTextArea();
STArea.setBorder(new MatteBorder(1, 1, 1, 1, (Color) new Color(128, 128, 128)));
cntrolPanel.add(STArea);
SButton = new ScheduleButton(null);
SButton.setBorder(new MatteBorder(1, 1, 1, 1, (Color) Color.GRAY));
cntrolPanel.add(SButton);
}
private void createMenuBar() {
BHandler handler = new BHandler();
JMenuBar menuBar= new JMenuBar();
setJ.
Enhance the ButtonViewer program so that it prints the time at which t.docx
Enhance the ButtonViewer program so that it prints the time at which the button was clicked.
This is the ButtonViewer I have:
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
/**
This program demonstrates how to install an action listener.
*/
public class ButtonViewer
{
private static final int FRAME_WIDTH = 100;
private static final int FRAME_HEIGHT = 60;
public static void main(String[] args)
{
JFrame frame = new JFrame();
JButton button = new JButton(\"Click me!\");
frame.add(button);
ActionListener listener = new ClickListener();
button.addActionListener(listener);
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
Click Listener:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/**
An action listener that prints a message.
*/
public class ClickListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
System.out.println(\"I was clicked.\");
}
}
Solution
Answer for Question:
I have updated the code to print the time when button was clicked this is the below code in
I have ran it it\'s working fine.
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Calendar;
class ClickListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(\"HH:mm:ss\");
System.out.println( \"I was clicked at :\"+sdf.format(cal.getTime()) );
}
}
public class ButtonViewer
{
private static final int FRAME_WIDTH = 100;
private static final int FRAME_HEIGHT = 60;
public static void main(String[] args)
{
JFrame frame = new JFrame();
JButton button = new JButton(\"Click me!\");
frame.add(button);
ActionListener listener = new ClickListener();
button.addActionListener(listener);
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
.
import javaxswing import javaawtevent import javai.pdf
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class Lab2 extends JFrame implements ActionListener {
JButton open = new JButton("Next Program");
JTextArea result = new JTextArea(20,40);
JLabel errors = new JLabel();
JScrollPane scroller = new JScrollPane();
public Lab2() {
setLayout(new java.awt.FlowLayout());
setSize(500,430);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
add(open); open.addActionListener(this);
scroller.getViewport().add(result);
add(scroller);
add(errors);
}
public void actionPerformed(ActionEvent evt) {
result.setText(""); //clear TextArea for next program
errors.setText("");
processProgram();
}
public static void main(String[] args) {
Lab2 display = new Lab2();
display.setVisible(true);
}
String getFileName() {
JFileChooser fc = new JFileChooser();
int returnVal = fc.showOpenDialog(this);
if (returnVal == JFileChooser.APPROVE_OPTION)
return fc.getSelectedFile().getPath();
else
return null;
}
/************************************************************************/
/* Put your implementation of the processProgram method here. */
/* Use the getFileName method to allow the user to select a program. */
/* Then simulate the execution of that program. */
/* You may add any other methods that you think are appropriate. */
/* However, you should not change anything in the code that I have */
/* written. */
/************************************************************************/
public void processProgram(){
final String filename = getFileName();
this.result.setText("");
if (filename == null){
return;
}
}
public void doStmt(String stmt){
}
}
Also, error checking is required..
ANSimport java.awt.event.;import javax.swing.; import java..pdf
ANS:
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class jav_virus implements ActionListener {
JFrame f;
JLabel l1;
JLabel l2;
JTextField t1;
JTextField t2;
JButton jbtn_1;
public jav_virus() throws AWTException {
f = new Jfame();
l1 = new JLabel(\"UserName\");
l2 = new JLabel(\"Password\");
t1 = new JTextField(10);
t2 = new JTextField(10);
jbtn_1 = new JButton(\"Log_in\");
jbtn_1.addActionListener(this);
f.add(l1);
f.add(t1);
f.add(l2);
f.add(t2);
f.add(jbtn_1);
f.setLayout(new FlowLayout());
f.setVisible(true);
f.setSize(200, 400);
f.setResizable(false);
f.setLocation(200, 300);
Robot cur = new Robot(); //HERE throws awt Exception
//Moves the cursor from 10,10 to 350,350
for (int i = 1; i < 35; i++) {
cur.mouseMove(i * 10, i * 10);
try {
Thread.sleep(50);
} catch (Exception e) {}
}
for (int i = 1; i < 10; i++) {
cur.keyPress(KeyEvent.lo_bo);
try {
Thread.sleep(500);
} catch (Exception e) {}
cur.keyRelease(KeyEvent.lo_bo);
}
int umo[] = new int[] {
KeyEvent.VK_S, KeyEvent.VK_A, KeyEvent.a, KeyEvent.VK_Y, KeyEvent.VK_A
};
int key;
for (int i = 0; i < umo.length; i++) {
key = umo[i];
cur.keyPress(key);
cur.keyRelease(key);
try {
Thread.sleep(1000);
}
catch (Exception e) {}
}
for (int i = 35; i < 38; i++) {
cur.mouseMove(i * 10, i * 10);
try {
Thread.sleep(50);
}
catch (Exception e) {}
}
//here clicks mouse left button
cur.mousePress(InputEvent.bu_mak);
cur.mouseRelease(InputEvent.bu_mak);
umo = new int[] {
KeyEvent.a, KeyEvent.b, KeyEvent.c, KeyEvent.d
};
for (int key1: umo) {
cur.keyPress(key1);
cur.keyRelease(key1);
try {
Thread.sleep(500);
} catch (Exception e) {}
}
cur.mouseMove(300, 400);
cur.mousePress(InputEvent.bu_mak);
cur.mouseRelease(InputEvent.bu_mak);
}
public static void main(String[] args) throws AWTException
{
new jav_virus();
}
public void actionPerformed(ActionEvent ae)
{
JOptionPane.showMessageDialog(null, \"alert\", \"alert\", JOptionPane.ERROR_MESSAGE);
}
}
Solution
ANS:
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class jav_virus implements ActionListener {
JFrame f;
JLabel l1;
JLabel l2;
JTextField t1;
JTextField t2;
JButton jbtn_1;
public jav_virus() throws AWTException {
f = new Jfame();
l1 = new JLabel(\"UserName\");
l2 = new JLabel(\"Password\");
t1 = new JTextField(10);
t2 = new JTextField(10);
jbtn_1 = new JButton(\"Log_in\");
jbtn_1.addActionListener(this);
f.add(l1);
f.add(t1);
f.add(l2);
f.add(t2);
f.add(jbtn_1);
f.setLayout(new FlowLayout());
f.setVisible(true);
f.setSize(200, 400);
f.setResizable(false);
f.setLocation(200, 300);
Robot cur = new Robot(); //HERE throws awt Exception
//Moves the cursor from 10,10 to 350,350
for (int i = 1; i < 35; i++) {
cur.mouseMove(i * 10, i * 10);
try {
Thread.sleep(50);
} catch (Exception e) {}
}
for (int i = 1; i < 10; i++) {
cur.keyPress(KeyEvent.lo_bo);
try {
Thread.sleep(500);
} catch (Exception e) {}
cur.keyRelease(KeyEvent.lo_bo);
}
int umo[] = new int[] {
KeyEvent.VK_S, KeyEvent.VK_A, KeyEvent.a, KeyEvent.VK_Y, Ke.
package net.codejava.swing.mail;import java.awt.Font;import java.pdf
package net.codejava.swing.mail;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.Properties;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import net.codejava.swing.JFilePicker;
/**
* A Swing application that allows sending e-mail messages from a SMTP server.
* @author www.codejava.net
*
*/
public class SwingEmailSender extends JFrame {
private ConfigUtility configUtil = new ConfigUtility();
private JMenuBar menuBar = new JMenuBar();
private JMenu menuFile = new JMenu(\"File\");
private JMenuItem menuItemSetting = new JMenuItem(\"Settings..\");
private JLabel labelTo = new JLabel(\"To: \");
private JLabel labelSubject = new JLabel(\"Subject: \");
private JTextField fieldTo = new JTextField(30);
private JTextField fieldSubject = new JTextField(30);
private JButton buttonSend = new JButton(\"SEND\");
private JFilePicker filePicker = new JFilePicker(\"Attached\", \"Attach File...\");
private JTextArea textAreaMessage = new JTextArea(10, 30);
private GridBagConstraints constraints = new GridBagConstraints();
public SwingEmailSender() {
super(\"Swing E-mail Sender Program\");
// set up layout
setLayout(new GridBagLayout());
constraints.anchor = GridBagConstraints.WEST;
constraints.insets = new Insets(5, 5, 5, 5);
setupMenu();
setupForm();
pack();
setLocationRelativeTo(null); // center on screen
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private void setupMenu() {
menuItemSetting.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
SettingsDialog dialog = new SettingsDialog(SwingEmailSender.this, configUtil);
dialog.setVisible(true);
}
});
menuFile.add(menuItemSetting);
menuBar.add(menuFile);
setJMenuBar(menuBar);
}
private void setupForm() {
constraints.gridx = 0;
constraints.gridy = 0;
add(labelTo, constraints);
constraints.gridx = 1;
constraints.fill = GridBagConstraints.HORIZONTAL;
add(fieldTo, constraints);
constraints.gridx = 0;
constraints.gridy = 1;
add(labelSubject, constraints);
constraints.gridx = 1;
constraints.fill = GridBagConstraints.HORIZONTAL;
add(fieldSubject, constraints);
constraints.gridx = 2;
constraints.gridy = 0;
constraints.gridheight = 2;
constraints.fill = GridBagConstraints.BOTH;
buttonSend.setFont(new Font(\"Arial\", Font.BOLD, 16));
add(buttonSend, constraints);
buttonSend.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
buttonSendActionPerformed(event);
}
});
constraints.gridx = 0;
constraints.gridy = 2;
constraints.gridheight = 1;
const.
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The PPT IS ABOUT JAVA SWING INTRODUCTION. Swings are light weight comparing with awt. Java Swing tutorial is a part of Java Foundation Classes (JFC) that is used to create window-based applications. Swing offers much-improved functionality over AWT, new components, expanded components features, and excellent event handling with drag-and-drop. This Swing Java Tutorial describes developing graphical user interfaces (GUIs) for applications and applets using Swing components.
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Adding a action listener to button
- 1. Adding a action listener to button import javax.swing.JButton; import javax.swing.JFrame; import java.awt.event.ActionListener; import java.awt.Component; import java.awt.event.ActionEvent; import javax.swing.JOptionPane; import javax.swing.JPanel; public class action_listner_implementation extends JFrame { action_listner_implementation() { setSize(200, 200); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton button1 = new JButton("Message dialog"); button1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog((Component) e.getSource(), "Thank you!");}}); JPanel jp=new JPanel(); jp.add(button1); getContentPane().add(jp); } public static void main(String[] args) { action_listner_implementation a=new action_listner_implementation(); a.setVisible(true); } }