I've this Actionlistener that change my previous panel into a second one, now I want to put a "Back" button in panel2 that take me back to panel1 maintaining its graphic setting.
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JFrame {
private static final long serialVersionUID = 1L;
public static void main(String[] args){
final JFrame Main = new JFrame("TEST");
Main.setVisible(true);
Main.setSize(600, 600);
Main.setLocationRelativeTo(null);
Main.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Adding JPanel
JPanel panel = new JPanel();
Main.add(panel);
//JPanel settings
panel.setLayout(null);
panel.setBackground(Color.GREEN);
//Adding JButton
JButton button = new JButton("Button 1");
JButton button2 = new JButton("Button2");
panel.add(button);
panel.add(button2);
//JButton settings
button.setBounds(70, 160, 200, 200);
button2.setBounds(320, 160, 200, 200);
//Button action
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
JPanel panel2 = new JPanel();
//Panel2 settings
JButton button3 = new JButton("Back");
panel2.add(button3);
panel2.setBackground(Color.RED);
Main.getContentPane().removeAll();
Main.getContentPane().add(panel2);
Main.getContentPane().validate();
}
});
//Button action
button2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
JPanel panel3 = new JPanel();
//Panel2 settings
JButton button3 = new JButton("Back");
panel3.add(button3);
panel3.setBackground(Color.YELLOW);
//Button action
button3.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
JPanel panel = new JPanel();
Main.getContentPane().removeAll();
Main.getContentPane().add(panel);
Main.getContentPane().validate();
}
});
Main.getContentPane().removeAll();
Main.getContentPane().add(panel3);
Main.getContentPane().validate();
}
});
}
}
Related
I am a new to Java, I met a problem. Once I click the Button, it never shows me another form, just disappear. You can see, I set the button ActionListener, but it only run the second line (close the current form).
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class login implements ActionListener {
public login(){
JFrame frame = new JFrame("Login");
frame.setLayout(new GridLayout(5,1));
JLabel label1 = new JLabel("User Name:");
JPanel panel1 = new JPanel();
frame.add(new JPanel());
frame.add(panel1);
panel1.add(label1);
JLabel label2 = new JLabel("Password:");
JPanel panel2 = new JPanel();
frame.add(panel2);
panel2.add(label2);
JPanel panel3 = new JPanel();
JButton button1 = new JButton("Register");
//button1.addActionListener(this);
JButton button2 = new JButton("Login");
//button2.addActionListener(this);
JButton button3 = new JButton("Cancel");
//button3.addActionListener(this);
panel3.add(button1);
panel3.add(button2);
panel3.add(button3);
frame.add(panel3);
JTextField JTF = new JTextField(12);
JPasswordField JPF = new JPasswordField(12);
panel1.add(JTF);
panel2.add(JPF);
frame.setResizable(false);
frame.setVisible(true);
frame.setSize(300, 200);
frame.setLocation(300,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
button1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
new register();
frame.dispose();
}
});
}
public static void main(String[] args){
new login();
}
public void actionPerformed(ActionEvent e ){
}
}
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Library {
JFrame frame = new JFrame("Library Management - MENU");
JButton button1 = new JButton();
JButton button2 = new JButton();
JButton button3 = new JButton();
JButton button4 = new JButton();
JButton button5 = new JButton();
JButton button6 = new JButton();
JButton button7 = new JButton();
/**
*/
public Library()
{
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout());
JLabel label = new JLabel("MENU");
panel.add(label);
button1.setText("ISSUE a BOOK");
button1.setBounds(100,100,200,30);
panel.add(button1);
button2.setText("RETURN a BOOK");
button2.setBounds(200,200,200,30);
panel.add(button2);
button3.setText("UPDATE/SEARCH RECORD");
button3.setBounds(300,300,200,30);
panel.add(button3);
frame.add(panel);
button1.addActionListener((ActionEvent e) -> {
frame.setTitle("ISSUE");
JPanel panel1 = new JPanel();
panel1.setLayout(new FlowLayout());
button6.setText("ISSUE a BOOK on CARD1");
button6.setBounds(100,100,200,30);
panel1.add(button6);
button7.setText("ISSUE a BOOK on CARD2");
button7.setBounds(100,100,200,30);
panel1.add(button7);
frame.add(panel1);
frame.setVisible(true);
});
button2.addActionListener((ActionEvent e) -> {
frame.setTitle("RETRUN");
JPanel panel1 = new JPanel();
panel1.setLayout(new FlowLayout());
button4.setText("RETURN a BOOK on CARD1");
button4.setBounds(100,100,200,30);
panel1.add(button4);
button5.setText("RETURN a BOOK on CARD2");
button5.setBounds(100,100,200,30);
panel1.add(button5);
frame.add(panel1);
frame.setVisible(true);
});
frame.setSize(500,500);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
Library obj=new Library();
}
}
I am creating a library management app and i have created multiple jpanels in a frame but when i move from
panel to another it fluctuates and a previously used buttons overlap
current buttons. And even buttons are not moving at proper postions even after changing the setBounds parameters.
Try using CardLayout, here is your code with the card layout being used... Note: You're missing some actions on your buttons to return to the MAIN screen, I'll leave that to you! :-)
import java.awt.CardLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Library {
JFrame frame = new JFrame("Library Management - MENU");
JButton button1 = new JButton();
JButton button2 = new JButton();
JButton button3 = new JButton();
JButton button4 = new JButton();
JButton button5 = new JButton();
JButton button6 = new JButton();
JButton button7 = new JButton();
public Library() {
JPanel cards = new JPanel(new CardLayout());
JPanel firstPanel = new JPanel();
JPanel secondPanel = new JPanel();
JPanel thirdPanel = new JPanel();
//Init some components...
JLabel label = new JLabel("MENU");
button1.setText("ISSUE a BOOK");
button2.setText("RETURN a BOOK");
button3.setText("UPDATE/SEARCH RECORD");
button4.setText("RETURN a BOOK on CARD1");
button5.setText("RETURN a BOOK on CARD2");
button6.setText("ISSUE a BOOK on CARD1");
button7.setText("ISSUE a BOOK on CARD2");
//First panel setup
firstPanel.setLayout(new FlowLayout());
firstPanel.add(label);
firstPanel.add(button1);
firstPanel.add(button2);
firstPanel.add(button3);
//Second panel setup
secondPanel.setLayout(new FlowLayout());
secondPanel.add(button6);
secondPanel.add(button7);
//Third panel setup
thirdPanel.setLayout(new FlowLayout());
thirdPanel.add(button4);
thirdPanel.add(button5);
//Show ISSUE on click of button1
button1.addActionListener((ActionEvent e) -> {
//Change cards to ISSUE panel
frame.setTitle("ISSUE");
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, "ISSUE");
});
//Show RETURN on click of button2
button2.addActionListener((ActionEvent e) -> {
frame.setTitle("RETRUN");
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, "RETRUN");
});
//Add content to cardlayout JPanel
cards.add(firstPanel, "MENU");
cards.add(secondPanel, "ISSUE");
cards.add(thirdPanel, "RETURN");
frame.add(cards);
//Initial card to show...
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, "MENU");
//Frame constraints
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
Library obj = new Library();
}
}
I am trying to display the drawing that I have posted. When my code runs and the user clicks Account, the panel only displays the buttons "OK" and "Cancel" (see screenshot). I have added three JTextAreas with a JLabel for each to the panel accountPanel but they don't display. My code is below.
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Component;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TestApplication implements ActionListener {
public static void main(String[] args) {
JLabel input = new JLabel();
final JFrame frame = new JFrame();
frame.setSize(1000, 1000);
frame.setTitle("RBA Test Application");
frame.add(input);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JRadioButton apprve = new JRadioButton("Approve");
JRadioButton decline = new JRadioButton("Decline");
JRadioButton ethernet = new JRadioButton("Ethernet");
ethernet.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog esettings = new JDialog(frame);
esettings.setTitle("Ethernet Settings");
esettings.setSize(400, 400);
esettings.pack();
esettings.setVisible(true);
}
});
JRadioButton rs = new JRadioButton("RS232");
rs.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog rsettings = new JDialog(frame);
rsettings.setTitle("RS232 Settings");
rsettings.setSize(400, 400);
rsettings.pack();
rsettings.setVisible(true);
}
});
JRadioButton usbcdc = new JRadioButton("USB_CDC");
usbcdc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog usbc = new JDialog(frame);
usbc.setTitle("USB_CDC Settings");
usbc.setSize(400, 400);
usbc.pack();
usbc.setVisible(true);
}
});
JRadioButton usbhid = new JRadioButton("USB_HID");
usbhid.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog usbh = new JDialog(frame);
usbh.setTitle("USB_HID Settings");
usbh.setSize(400, 400);
usbh.pack();
usbh.setVisible(true);
}
});
JButton next = new JButton("Next");
JButton aok = new JButton("OK");
JButton bok = new JButton("OK");
JButton cok = new JButton("OK");
JButton acancel = new JButton("Cancel");
JButton bcancel = new JButton("Cancel");
JButton ccancel = new JButton("Cancel");
JButton dcancel = new JButton("Cancel");
JLabel cardLabel = new JLabel("Card Number: ");
JLabel expLabel = new JLabel("Exp. Date: ");
JLabel cvvLabel = new JLabel("CVV: ");
JTextArea card = new JTextArea();
card.add(cardLabel);
JTextArea expDate = new JTextArea();
expDate.add(expLabel);
JTextArea cvv = new JTextArea();
cvv.add(cvvLabel);
final JPanel PortSettings = new JPanel();
PortSettings.add(ethernet);
PortSettings.add(rs);
PortSettings.add(usbcdc);
PortSettings.add(usbhid);
PortSettings.add(next);
PortSettings.add(bcancel);
final JPanel accountPanel = new JPanel();
accountPanel.add(bok);
accountPanel.add(ccancel);
accountPanel.add(card);
accountPanel.add(expDate);
accountPanel.add(cvv);
final JPanel apprvordecl = new JPanel();
apprvordecl.add(apprve);
apprvordecl.add(decline);
apprvordecl.add(aok);
apprvordecl.add(acancel);
final JPanel amountPanel = new JPanel();
amountPanel.add(cok);
amountPanel.add(dcancel);
input.setFont(new java.awt.Font("Tahoma", 3, 18));
input.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
input.setText("Input / Output Log");
JButton initialize = new JButton("Initialize");
JButton connect = new JButton("Connect");
JButton disconnect = new JButton("Disconnect");
JButton shutdown = new JButton("Shut Down");
JButton portsettings = new JButton("Port Settings");
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog port = new JDialog(frame);
port.setTitle("Port Settings");
port.setSize(400, 400);
port.add(PortSettings);
port.pack();
port.setVisible(true);
}
});
JButton online = new JButton("Go Online");
JButton offline = new JButton("Go Offline");
JButton status = new JButton("Status");
JButton reboot = new JButton("Reboot");
JButton account = new JButton("Account");
account.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog accountDialog = new JDialog(frame);
accountDialog.setTitle("Account");
accountDialog.setSize(400, 400);
accountDialog.add(accountPanel);
accountDialog.pack();
accountDialog.setVisible(true);
}
});
JButton amount = new JButton("Amount");
amount.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog amount2 = new JDialog(frame);
amount2.setTitle("Amount");
amount2.setSize(400, 400);
amount2.add(amountPanel);
amount2.pack();
amount2.setVisible(true);
}
});
JButton reset = new JButton("Reset");
JButton approvordecl = new JButton("Approve / Decline");
approvordecl.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog apprv = new JDialog(frame);
apprv.setTitle("Approve / Decline");
apprv.setSize(400, 400);
apprv.add(apprvordecl);
apprv.pack();
apprv.setVisible(true);
}
});
JButton test = new JButton("Test Button #1");
JButton testing = new JButton("Test Button #2");
JRadioButton button = new JRadioButton("Radio Button");
JRadioButton button2 = new JRadioButton("Radio Button");
JCheckBox checkbox = new JCheckBox("Check Box");
JCheckBox checkbox2 = new JCheckBox("Check Box");
ButtonGroup group = new ButtonGroup();
group.add(usbhid);
group.add(usbcdc);
group.add(ethernet);
group.add(rs);
ButtonGroup approvegroup = new ButtonGroup();
approvegroup.add(apprve);
approvegroup.add(decline);
JPanel testPanel = new JPanel();
testPanel.add(button);
testPanel.add(button2);
testPanel.add(checkbox2);
JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);
JPanel llpPanel = new JPanel();
llpPanel.add(online);
llpPanel.add(offline);
llpPanel.add(status);
llpPanel.add(reboot);
llpPanel.add(account);
llpPanel.add(amount);
llpPanel.add(reset);
llpPanel.add(approvordecl);
JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");
JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);
frame.pack();
}
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}
JPanel uses FlowLayout by default which respects preferred sizes. The default width of the preferred size for the JTextArea's is 0 x 0. You need to give the JTextComponent's a preferred size for them to appear. Use the constructor that specifys rows & columns:
JTextArea card = new JTextArea(5, 10);
Don't forget to make the JTextArea scrollable by enclosing it in a JScrollPane:
accountPanel.add(new JScrollPane(card));
i made this code to navigate trough panel1 and panel2
with buttons.
(button1 and button2) but when i run my code the frame stays empty.
Can somebody explain me what i'm doing wrong and how i can accomplish
toggling between panel1 and panel2 in this way? Starting with panel1 first
Code:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JFrame;
public class togglepanel {
public static void main(String[] args) {
final JFrame frame = new JFrame();
final JPanel panel1 = new JPanel();
final JPanel panel2 = new JPanel();
JButton button1 = new JButton("previous frame!");
JButton button2 = new JButton("next frame");
frame.setLocationRelativeTo(null);
frame.setResizable(true);
frame.setVisible(true);
frame.setSize(600, 400);
frame.add(panel1);
frame.add(panel2);
panel1.add(button2);
panel1.setVisible(true);
panel2.add(button1);
panel2.setVisible(false);
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
panel1.setVisible(true);
panel2.setVisible(false);
}
});
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
panel1.setVisible(false);
panel2.setVisible(true);
}
});
}
}
thanks in advance
Use a layout manager.
frame.setLayout(new FlowLayout());
Another useful way to do this, and I think better is to use a CardLayout and to add both JPanels to a container that uses this CardLayout. You can then easily swap views by calling the CardLayout methods.
e.g.,
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TogglePanel {
public static void main(String[] args) {
final CardLayout cardlayout = new CardLayout();
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final Container contentPane = frame.getContentPane();
contentPane.setLayout(cardlayout);
final JPanel panel1 = new JPanel();
final JPanel panel2 = new JPanel();
JButton button1 = new JButton("previous frame!");
JButton button2 = new JButton("next frame");
contentPane.setPreferredSize(new Dimension(600, 400));
contentPane.add(panel1, "Panel 1");
contentPane.add(panel2, "Panel 2");
frame.pack();
frame.setLocationRelativeTo(null);
frame.setResizable(true);
frame.setVisible(true);
panel1.add(button2);
panel2.add(button1);
ActionListener btnListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
cardlayout.next(contentPane);
}
};
button1.addActionListener(btnListener);
button2.addActionListener(btnListener);
}
}
I'm putting together the basic layout for a contacts book, and I want to know how I can make the 3 test buttons span from edge to edge just as the arrow buttons do.
private static class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
System.out.println("Code Placeholder");
}
}
public static void main(String[] args) {
//down button
ImageIcon downArrow = new ImageIcon("down.png");
JButton downButton = new JButton(downArrow);
ButtonHandler downListener = new ButtonHandler();
downButton.addActionListener(downListener);
//up button
ImageIcon upArrow = new ImageIcon("up.png");
JButton upButton = new JButton(upArrow);
ButtonHandler upListener = new ButtonHandler();
upButton.addActionListener(upListener);
//contacts
JButton test1Button = new JButton("Code Placeholder");
JButton test2Button = new JButton("Code Placeholder");
JButton test3Button = new JButton("Code Placeholder");
Box box = Box.createVerticalBox();
box.add(test1Button);
box.add(test2Button);
box.add(test3Button);
JPanel content = new JPanel();
content.setLayout(new BorderLayout());
content.add(box, BorderLayout.CENTER);
content.add(downButton, BorderLayout.SOUTH);
content.add(upButton, BorderLayout.NORTH);
JFrame window = new JFrame("Contacts");
window.setContentPane(content);
window.setSize(400, 600);
window.setLocation(100, 100);
window.setVisible(true);
}
Following up on #kloffy's suggestion:
package playground.tests;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import junit.framework.TestCase;
public class ButtonTest extends TestCase {
public void testThreeButtons() throws Exception {
JPanel panel = new JPanel();
panel.setLayout(new GridLayout());
JButton button1 = new JButton("A");
JButton button2 = new JButton("B");
JButton button3 = new JButton("C");
panel.add(button1);
panel.add(button2);
panel.add(button3);
JFrame window = new JFrame("Contacts");
window.setContentPane(panel);
window.setSize(300, 600);
window.pack();
window.setVisible(true);
int width = button1.getWidth();
assertEquals(width, button2.getWidth());
assertEquals(width, button3.getWidth());
}
}