Hi i am trying to make java desktop application where i am using multiple jlabel i want to give little spaces between every label
how can i achieve this
here is my code
public class Second extends javax.swing.JFrame {
JLabel label=new JLabel();
/**
* Creates new form Second
*/
public Second() {
this.getContentPane().setBackground(new java.awt.Color(255, 140, 0));
this.setExtendedState(JFrame.MAXIMIZED_BOTH);
this.setUndecorated(true);
JButton print= new JButton();
print.setBackground(new java.awt.Color(153, 153, 0));
print.setOpaque(true);
print.setBounds(525,1282,130,85);
print.setFont(new java.awt.Font("Times New Roman", 1, 24)); // NOI18N
print.setForeground(new java.awt.Color(255,255,255));
print.setText("Print");
this.add(print);
JButton home= new JButton();
home.setBackground(new java.awt.Color(153, 153, 0));
home.setOpaque(true);
home.setBounds(640,1282,130,85);
home.setFont(new java.awt.Font("Times New Roman", 1, 24)); // NOI18N
home.setForeground(new java.awt.Color(255, 255,255 ));
home.setText("Home");
this.add(home);
int Height = 134;
int a=100;
ArrayList<JLabel> label = new ArrayList<JLabel>();
for(int i=0;i<23;i++){
JLabel j = new JLabel();
j.setBackground(new java.awt.Color(255, 140, 255));
j.setOpaque(true);
j.setBounds(5,Height,378,50);
j.setFont(new java.awt.Font("Times New Roman", 1, 16)); // NOI18N
j.setForeground(new java.awt.Color(128, 128, 128));
j.setText("Case Item CourtNo ");
LineBorder line = new LineBorder(Color.blue, 2, true);
j.setBorder(line);
this.add(j);
label.add(j);
JLabel j1 = new JLabel();
j1.setBackground(new java.awt.Color(255, 140, 0));
j1.setOpaque(true);
j1.setBounds(390,Height,768,50);
j1.setFont(new java.awt.Font("Times New Roman", 1, 16)); // NOI18N
j1.setForeground(new java.awt.Color(128, 128, 128));
j1.setText("Case Item CourtNo ");
this.add(j1);
label.add(j1);
Height = Height +50;
a=a+10;
}
initComponents();
}
public void paint(Graphics g) {
super.paint(g);
Graphics2D g3 = (Graphics2D) g;
BasicStroke bs = new BasicStroke(2);
Line2D lin1 = new Line2D.Float(386, 100, 386, 1282);
Line2D lin = new Line2D.Float(0, 1283, 768, 1283);
Line2D line3=new Line2D.Float(400,1284,400,1364);
g3.setStroke(bs);
g3.setColor(Color.white);
g3.draw(lin1);
g3.draw(lin);
g3.draw(line3);;
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Second().setVisible(true);
}
});
}}
My new code
public class Testing1 extends javax.swing.JFrame {
public Testing1() {
JFrame frame = new JFrame();
JPanel panel = createPanel();
panel.setLocation(100, 100);
//panel.setLayout(null);
this.add(panel);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.pack();
this.setLocationRelativeTo(null);
this.setVisible(true);
initComponents();
}
private JPanel createPanel() {
jPanel1 = new JPanel(new GridLayout(0, 1, 10, 5));
EmptyBorder panelBorder = new EmptyBorder(10, 10, 10, 10);
jPanel1.setBorder(panelBorder);
EmptyBorder border = new EmptyBorder(5, 20, 5, 20);
LineBorder line = new LineBorder(Color.blue, 2, true);
CompoundBorder compound = new CompoundBorder(line, border);
for (int i = 0; i <12; i++) {
JLabel label = new JLabel("Label" + i);
label.setBorder(compound);
// label.setBounds(13, 100, 100, 50);
jPanel1.add(label);
}
return jPanel1;
}
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(new java.awt.Color(204, 0, 153));
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 306, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 243, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 94, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(46, 46, 46)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
pack();
}
public static void main(String args[]) {
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Testing1().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JPanel jPanel1;
// End of variables declaration
}
updated
Thanks in advance
"How to give spaces between jlabel?"
setBounds and null layouts: no; Use EmptyBorders: YES!; Use LayoutManagers: YES!
"how can i use this can u explain little bit "
Use can use the default FlowLayout of the containing JPanel (or in this case set the gaps of the FlowLayout)
FlowLayout constructor:
public FlowLayout(int align,
int hgap,
int vgap)
align - the alignment value
hgap - the horizontal gap between components and between the components and the borders of the Container
vgap - the vertical gap between components and between the components and the borders of the Container
Example
JPanel panel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 5);
for (int i = 0; i < 10; i++) {
panel.add(new JLabel("Label" + i));
}
You could use EmptyBorder
EmptyBorder constructor
public EmptyBorder(int top,
int left,
int bottom,
int right)
top - the top inset of the border
left - the left inset of the border
bottom - the bottom inset of the border
right - the right inset of the border
Example
JPanel panel = new JPanel();
for (int i = 0; i < 10; i++) {
JLabel label = new JLabel("Label" + i);
EmptyBorder border = new EmptyBorder(5, 20, 5, 20);
label.setBorder(border);
panel.add(label);
}
If you want to use a LineBorder and an EmptyBorder for margins, you can use a CompoundBorder
A composite Border class used to compose two Border objects into a single border by nesting an inside Border object within the insets of an outside Border object. For example, this class may be used to add blank margin space to a component with an existing decorative border:
CompoundBorder Example
JPanel panel = new JPanel();
EmptyBorder border = new EmptyBorder(5, 20, 5, 20);
LineBorder line = new LineBorder(Color.blue, 2, true);
CompoundBorder compound = new CompoundBorder(line, border);
for (int i = 0; i < 10; i++) {
JLabel label = new JLabel("Label" + i);
label.setBorder(compound);
panel.add(label);
}
There is an abundant number possibilities. Choose your flavor. The whole point it no not try and set size and position to everything, and make use of layout managers and borders and gaps for sizing, spacing etc.
Learn to use the different layout managers at Laying out Components Within a Container
Full example using CompoundBorder and GridLayout(int rows, int cols, int hgap, int vgap)
import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
public class CompoundBorderDemo {
public CompoundBorderDemo() {
JFrame frame = new JFrame();
JPanel panel = createPanel();
frame.add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private JPanel createPanel() {
JPanel panel = new JPanel(new GridLayout(5, 5, 10, 10));
EmptyBorder panelBorder = new EmptyBorder(10, 10, 10, 10);
panel.setBorder(panelBorder);
EmptyBorder border = new EmptyBorder(5, 20, 5, 20);
LineBorder line = new LineBorder(Color.blue, 2, true);
CompoundBorder compound = new CompoundBorder(line, border);
for (int i = 0; i < 25; i++) {
JLabel label = new JLabel("Label" + i);
label.setBorder(compound);
panel.add(label);
}
return panel;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new CompoundBorderDemo();
}
});
}
}
Try using layouts like GridLayout instead of setting bounds to every label.
it is the simplest solution for your problem.Grid Layout May suit you better.
refer the links below for that..
GRID LAYOUT
Related
I have a JPanel that I want to dynamically fill with other jpanels, Like this: result
If I use a gridLayout it works unless it's not filled, in which case it will stretch the panels inside, like this gridlayout, stretched
If I use GridBagLayout it doesn't stretch them when there's few of them, but then it will not scroll when the panel is filled, like this gridbag, noscroll
I just can't get it to do both things: only vertical scroll AND no stretching when the panel is not filled.
The blue squares are JPanels with a borderLayout that I create passing labels and color as parameters. I tried making them absoluteLayout, gridBagLayout, fix their size, but the JPanel I add them to seems to overrule their settings.
public class Gbmapper extends JFrame {
/**
* Create the frame.
*/
public Gbmapper() {
//main window
setTitle("Gbmapper");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 800, 600);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JPanel panelParagrafi = new JPanel(new BorderLayout(4, 4));
panelParagrafi.setBounds(10, 67, 760, 180);
panelParagrafi.setBorder(new TitledBorder("Paragrafi"));
// here's the problem
JPanel listaNodi = new JPanel(new GridLayout(0,20,2,2));
//JPanel listaNodi = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(2,2,2,2);
/* flowlayout also will display a single row
JPanel listaNodi = new JPanel();
listaNodi.setBounds(10, 67, 764, 180);
listaNodi.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5)); */
// init the jpanel with some items
for (int i = 0; i < 10; i++) {
// for use with gridlayout
listaNodi.add( new GbmParNode(Integer.toString(50), Integer.toString(i), 'b') );
// for use with gridbaglayout, passes insets
//listaNodi.add( new GbmParNode(Integer.toString(50), Integer.toString(i), 'b'), gbc );
}
JScrollPane scrollPane = new JScrollPane(listaNodi,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
panelParagrafi.add(scrollPane);
contentPane.add(panelParagrafi);
}}
// My JPanel class
package gbmapper;
import javax.swing.JPanel;
import javax.swing.JLabel;
import java.awt.Font;
import java.awt.Color;
import java.awt.FlowLayout;
import javax.swing.SwingConstants;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.BorderLayout;
public class GbmParNode extends JPanel {
// COLORI
Color myGreen = new Color(173, 255, 47);
Color myRed = new Color(255, 80, 50);
Color myBlue = new Color(0, 204, 255);
Color myYellow = new Color(255, 255, 0);
Color myWhite = new Color(255, 255, 255);
JLabel lblParNum; // = new JLabel(parNum);
/**
* Create the panel.
*/
public GbmParNode(String parNum, String parDesc, char parColor) {
addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
}
});
Color myColor;
switch(parColor) {
case 'g':
myColor = myGreen;
break;
case 'r':
myColor = myRed;
break;
case 'b':
myColor = myBlue;
break;
case 'y':
myColor = myYellow;
break;
default:
myColor = myWhite;
}
setBackground(myColor);
setLayout(new BorderLayout(0, 0));
//setLayout(new GridBagLayout());
//setSize(50,50);
lblParNum = new JLabel(parNum);
lblParNum.setHorizontalAlignment(SwingConstants.CENTER);
lblParNum.setFont(new Font("Tahoma", Font.PLAIN, 18));
//lblParNum.setBounds(14, 5, 100, 22);
add(lblParNum, BorderLayout.CENTER);
JLabel lblParDesc = new JLabel(parDesc);
lblParDesc.setHorizontalAlignment(SwingConstants.CENTER);
//lblParDesc.setBounds(14, 25, 100, 14);
add(lblParDesc, BorderLayout.SOUTH);
}
}
I have an issue with my code below, the buttons and the Panel aren't displayed until mouseover
Could you please help me to identify the reason of this issue ?
Thank you in advance for your help.
Kind regards
JButton atelier;JButton examen;
private JPanel contentPane;
public void principe() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(50, 50,1000,700);
contentPane = new JPanel();
setContentPane(contentPane);
contentPane.setLayout(null);
JPanel Evenement = new JPanel();
Evenement.setBounds(3, 200, 251, 62);
contentPane.add(Evenement);
Evenement.setLayout(null);
Evenement.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent arg0) {
choix();}
});
JLabel lblNewLabel_5 = new JLabel("Activité");
lblNewLabel_5.setBounds(128, 13, 111, 36);
Evenement.add(lblNewLabel_5);
}
public void choix() {
JPanel m= new JPanel();
m.setBackground(new Color(70, 130, 180));
m.setBounds(260,20, 689, 75);
m.setLayout(null);
atelier = new JButton("Atelier");
atelier.setBounds(486,15, 137, 40);
atelier.setBackground(new Color(200, 180, 150));
m.add(atelier);
examen = new JButton("Examen");
examen.setBounds(344,15, 137, 40);
examen.setBackground(new Color(200, 180, 150));
m.add(examen);
contentPane.add(m);
}
I've been working on a login screen for a new project and came across a weird rendering "error" while using CardLayout on windows.
SignUp screen on Mac:SignUp Screen Mac
The screens load up correctly on my Mac computer, but on windows they look like these after you click "Register" or after you click "Back".
The same screens on windows:SignUp Screen Windows
As you can see, on windows the SignUp "card" from the CardLayout is rendered over the Login "card" without hiding the other one and vise versa, not like on mac.
Now my question is, could this be caused because of the transparent background and therefore windows thinks that the one behind should still be visible, or could it be creating a brand new "card" each time i switch, or just be forgetting to hide the one in the back all together?
Why does this work on Mac but not on Windows?
And also, how could i go about fixing this?
I will put the whole Class so you can test it for yourself.
(Side note: you may also notice that the button "Register" shows the white button shape on windows even though it has btnRegister.setBorder(null); set (works on Mac))
The complete one Class code:
package testing;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import utilities.ComponentMover;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Insets;
import javax.swing.JSeparator;
import javax.swing.JPasswordField;
#SuppressWarnings("serial")
public class ClientStarter extends JFrame implements ActionListener {
JPanel cards;
private int height = 450;
private int width = 700;
private int trasparancy = 90;
private int labelWidth = 400;
final static String BACK = "Back";
final static String REGISTER = "Register";
private Color textLine = Color.GRAY;
private Color textColor = Color.WHITE;
private Color tipColor = Color.GRAY;
private Color disabledTipColor = new Color(90, 90, 90);
// LOGIN //
JPanel loginCard;
public static JTextField usernameIn = new JTextField();
private JLabel userLabel = new JLabel("Username :");
public static JPasswordField passwordIn = new JPasswordField();
private JLabel passLabel = new JLabel("Password :");
private JButton btnLogin = new JButton("Login");
private JButton btnRegister = new JButton(REGISTER);
private JLabel registerLabel = new JLabel("Don't own an Account? ");
private JSeparator separatorUser = new JSeparator();
private JSeparator separatorPass = new JSeparator();
// SIGNUP //
JPanel joinCard;
public static JTextField emailNew = new JTextField();
public static JLabel newEmailLabel = new JLabel("Email : (Not Available)");
public static JTextField usernameNew = new JTextField();
public static JLabel newUserLabel = new JLabel("Username :");
public static JTextField passwordNew = new JTextField();
public static JLabel newPassLabel = new JLabel("Password :");
public static JTextField passwordNew2 = new JTextField();
public static JLabel newPassLabel2 = new JLabel("Re-enter password :");
private JButton btnSignUp = new JButton("Signup");
private JButton btnBack = new JButton(BACK);
private JSeparator separatorMailNew = new JSeparator();
private JSeparator separatorUserNew = new JSeparator();
private JSeparator separatorPassNew = new JSeparator();
private JSeparator separatorPassNew2 = new JSeparator();
public ClientStarter() {
getContentPane().setBackground(Color.GRAY);
setUndecorated(true);
setBackground(new Color(0, 0, 0, trasparancy));
setTitle("EnChant");
setSize(width, height);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setVisible(true);
setResizable(false);
//Create the cards
// LOGIN //
Font avenir = new Font("Avenir", Font.PLAIN, 18);
loginCard = new JPanel();
loginCard.setLayout(null);
usernameIn.setBounds(348, 150, 327, 35);
usernameIn.setColumns(10);
usernameIn.setFont(avenir);
usernameIn.setBorder(null);
passwordIn.setBounds(348, usernameIn.getY() + 74, 327, 35);
passwordIn.setColumns(10);
passwordIn.setFont(avenir);
passwordIn.setBorder(null);
userLabel.setBounds(usernameIn.getX(), usernameIn.getY() - 20, labelWidth, 16);
userLabel.setFont(avenir);
passLabel.setBounds(passwordIn.getX(), passwordIn.getY() - 20, labelWidth, 16);
passLabel.setFont(avenir);
btnLogin.setBounds(348, passwordIn.getY() + 81, 327, 45);
btnLogin.addActionListener(this);
registerLabel.setBounds(btnLogin.getX(), btnLogin.getY() + btnLogin.getHeight() + 5, labelWidth, 16);
registerLabel.setFont(new Font("Avenir", Font.PLAIN, 13));
btnRegister.setBounds(btnLogin.getX() + 130, registerLabel.getY() - 1, 70, 16);
btnRegister.addActionListener(this);
btnRegister.setBorder(null);
loginCard.setBackground(new Color(0, 0, 0, trasparancy));
usernameIn.setBackground(new Color(0, 0, 0, 0));
usernameIn.setForeground(textColor);
passwordIn.setBackground(new Color(0, 0, 0, 0));
passwordIn.setForeground(textColor);
userLabel.setForeground(tipColor);
passLabel.setForeground(tipColor);
btnLogin.setForeground(new Color(70, 130, 180));
btnLogin.setBackground(Color.WHITE);
btnRegister.setForeground(new Color(70, 130, 180));
registerLabel.setForeground(tipColor);
separatorUser.setForeground(textLine);
separatorUser.setBounds(usernameIn.getX(), usernameIn.getY()+usernameIn.getHeight()-8, usernameIn.getWidth(), 6);
separatorPass.setForeground(textLine);
separatorPass.setBounds(passwordIn.getX(), passwordIn.getY()+passwordIn.getHeight()-8, passwordIn.getWidth(), 6);
loginCard.add(usernameIn);
loginCard.add(separatorUser);
loginCard.add(userLabel);
loginCard.add(passwordIn);
loginCard.add(separatorPass);
loginCard.add(passLabel);
loginCard.add(btnLogin);
loginCard.add(btnRegister);
loginCard.add(registerLabel);
// SIGNUP //
joinCard = new JPanel();
joinCard.setLayout(null);
emailNew.setBounds(348, 62, 327, 35);
emailNew.setColumns(10);
emailNew.setFont(avenir);
emailNew.setBorder(null);
emailNew.setEditable(false);
usernameNew.setBounds(348, emailNew.getY() + 74, 327, 35);
usernameNew.setColumns(10);
usernameNew.setFont(avenir);
usernameNew.setBorder(null);
passwordNew.setBounds(348, usernameNew.getY() + 74, 327, 35);
passwordNew.setColumns(10);
passwordNew.setFont(avenir);
passwordNew.setBorder(null);
passwordNew2.setBounds(348, passwordNew.getY() + 74, 327, 35);
passwordNew2.setColumns(10);
passwordNew2.setFont(avenir);
passwordNew2.setBorder(null);
//32, 106, 180, 254 : 2, 76, 150, 224
newEmailLabel.setBounds(emailNew.getX(), emailNew.getY() - 20, labelWidth, 16);
newEmailLabel.setFont(avenir);
newUserLabel.setBounds(usernameNew.getX(), usernameNew.getY() - 20, labelWidth, 16);
newUserLabel.setFont(avenir);
newPassLabel.setBounds(passwordNew.getX(), passwordNew.getY() - 20, labelWidth, 16);
newPassLabel.setFont(avenir);
newPassLabel2.setBounds(passwordNew2.getX(), passwordNew2.getY() - 20, labelWidth, 16);
newPassLabel2.setFont(avenir);
btnSignUp.setBounds(348, passwordNew2.getY() + 71, 327, 45); //335 // +81
btnSignUp.addActionListener(this);
btnBack.setBounds(btnSignUp.getX()-70, btnSignUp.getY(), 70, 45); //380
btnBack.addActionListener(this);
joinCard.setBackground(new Color(0, 0, 0, trasparancy));
emailNew.setBackground(new Color(0, 0, 0, 0));
emailNew.setForeground(textColor);
usernameNew.setBackground(new Color(0, 0, 0, 0));
usernameNew.setForeground(textColor);
passwordNew.setBackground(new Color(0, 0, 0, 0));
passwordNew.setForeground(textColor);
passwordNew2.setBackground(new Color(0, 0, 0, 0));
passwordNew2.setForeground(textColor);
newEmailLabel.setForeground(disabledTipColor);
newUserLabel.setForeground(tipColor);
newPassLabel.setForeground(tipColor);
newPassLabel2.setForeground(tipColor);
btnSignUp.setForeground(new Color(70, 130, 180));
btnBack.setBackground(Color.WHITE);
separatorMailNew.setBounds(emailNew.getX(), emailNew.getY()+emailNew.getHeight()-8, emailNew.getWidth(), 6);
separatorMailNew.setForeground(textLine);
separatorUserNew.setBounds(usernameNew.getX(), usernameNew.getY()+usernameNew.getHeight()-8, usernameNew.getWidth(), 6);
separatorUserNew.setForeground(textLine);
separatorPassNew.setBounds(passwordNew.getX(), passwordNew.getY()+passwordNew.getHeight()-8, passwordNew.getWidth(), 6);
separatorPassNew.setForeground(textLine);
separatorPassNew2.setBounds(passwordNew2.getX(), passwordNew2.getY()+passwordNew2.getHeight()-8, passwordNew2.getWidth(), 6);
separatorPassNew2.setForeground(textLine);
joinCard.add(emailNew);
joinCard.add(newEmailLabel);
joinCard.add(usernameNew);
joinCard.add(newUserLabel);
joinCard.add(passwordNew);
joinCard.add(newPassLabel);
joinCard.add(passwordNew2);
joinCard.add(newPassLabel2);
joinCard.add(btnSignUp);
joinCard.add(btnBack);
joinCard.add(separatorMailNew);
joinCard.add(separatorUserNew);
joinCard.add(separatorPassNew);
joinCard.add(separatorPassNew2);
// End //
JPanel whiteRectLogin = new JPanel();
whiteRectLogin.setBackground( Color.WHITE );
whiteRectLogin.setBounds(0, 0, 250, height);
loginCard.add(whiteRectLogin);
JPanel whiteRectJoin = new JPanel();
whiteRectJoin.setBackground( Color.WHITE );
whiteRectJoin.setBounds(0, 0, 250, height);
joinCard.add(whiteRectJoin);
cards = new JPanel(new CardLayout());
cards.setBackground(new Color(0, 0, 0, trasparancy));
cards.add(loginCard, BACK);
cards.add(joinCard, REGISTER);
getContentPane().add(cards);
//Top, Left, bottom, right
ComponentMover cm = new ComponentMover(this, this);
cm.setEdgeInsets(new Insets(-50, 1, 0, -50));
validate();
repaint();
getContentPane().setLayout(null);
}
public void actionPerformed(ActionEvent e) {
if(e.getSource() == btnRegister) {
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, REGISTER);
loginCard.setVisible(false);
}
if(e.getSource() == btnBack) {
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, BACK);
loginCard.setVisible(false);
}
if(e.getSource() == btnSignUp) {
//new SignUpCheck();
}
}
public static void main(String[] args) {
new ClientStarter();
}
}
could this be caused because of the transparent background
Probably. Swing does not renderer transparent backgrounds correctly. Swing expects a component to be either fully opaque or fully transparent.
Check out Backgrounds With Transparency for a complete description of the problem and a couple of solutions.
You can either do custom painting of every component with code something like:
JPanel panel = new JPanel()
{
protected void paintComponent(Graphics g)
{
g.setColor( getBackground() );
g.fillRect(0, 0, getWidth(), getHeight());
super.paintComponent(g);
}
};
panel.setOpaque(false); // background of parent will be painted first
panel.setBackground( new Color(255, 0, 0, 20) );
frame.add(panel);
Or you can use the AlphaContainer class to do the painting for you.
Also, you have several other problems:
Don't use static variables for your Swing components. That is no the proper usage of the static keyword.
Don't use a null layout and setBounds(). Swing was designed to be used with layout managers. Layout managers work well on multiple platforms.
Don't use an alpha value of 0. The 0 means fully transparent, so just use the setOpaque(false) method on the component.
Don't keep creating new Color objects. The same Color object can be used for every component. It save resources and makes it easier to change all Color for all components all at once.
Don't use validate() and repaint() in the constructor of your class. All the components should be added to the frame BEFORE you invoke setVisible(true) so those methods are not required.
I want to generate multiple panels (with title, desc and detail button), this is the general structure:
But when I put this code in a for loop it always adds the last item.
Panel panel_1 = new Panel();
panel_1.setBounds(23, 134, 378, 208);
JLabel lblNewLabel_2 = new JLabel("desc");
lblNewLabel_2.setBounds(0, 69, 189, 69);
JButton btnNewButton_2 = new JButton("Details");
btnNewButton_2.setBounds(104, 139, 189, 69);
panel_1.setLayout(null);
JLabel lblPrv = new JLabel("title");
lblPrv.setBounds(104, 0, 189, 69);
panel_1.add(lblPrv);
panel_1.add(lblNewLabel_2);
JLabel label_1 = new JLabel("");
label_1.setBounds(0, 69, 189, 69);
panel_1.add(label_1);
panel_1.add(btnNewButton_2);
Any suggestion?
Here is an example of how to place multiple panels next to each other:
public class Example extends JFrame {
Example() {
setLayout(new FlowLayout());
for (int i = 0; i < 4; i++)
add(new MyPanel());
setDefaultCloseOperation(EXIT_ON_CLOSE);
pack();
setVisible(true);
}
class MyPanel extends JPanel {
MyPanel() {
setLayout(new BorderLayout());
add(new JLabel("title", SwingConstants.CENTER), BorderLayout.PAGE_START);
add(new JLabel("<html>WWWWWW WWWWWWW<p>WWWWWWWWW<p>RRRRRRR RRRRR RRRRRRR"));
add(new JButton("Details"), BorderLayout.PAGE_END);
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> new Example());
}
}
You should pick the layout managers best suited for your situation.
I have this class which creates a grid:
class GridPane extends JPanel{
public GridPane(int row,int col){
setLayout(new GridLayout(row,col));
setBorder(BorderFactory.createEmptyBorder(1,1,1,1));
for (int i =1; i<=(row*col); i++)
{
JPanel pan = new JPanel();
pan.setBackground(Color.RED);
pan.setPreferredSize(new Dimension(3,3));
pan.setBorder(BorderFactory.createLineBorder(Color.BLACK));
add(pan);
}
}
And this which sets up the empty main frame with the group layout:
public MainFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGap(0, 440, Short.MAX_VALUE)
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGap(0, 268, Short.MAX_VALUE)
);
contentPane.setLayout(gl_contentPane);
}
I am not very experienced with SWING and I have been trying to add a GridPane object to the Right of the Main Frame for some time. It keeps telling me something like :
java.lang.IllegalStateException: GridPane[,0,0,0x0,invalid,layout=java.awt.GridLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.border.EmptyBorder#6ba7508a,flags=9,maximumSize=,minimumSize=,preferredSize=] is not attached to a vertical/horizontal group
Does anyone know what is going on? What should I do to accomplish what I need? Sorry for posting lots of code. Thanks for the help.
I would suggest that in this case you make use of BorderLayout.
contentPane = new JPanel();
contentPane.setLayout(new BorderLayout());
contentPane.add(pan, BorderLayout.LINE_END);
Here is the full code. I hope this is what you are looking for.
public class Main {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setLayout(new BorderLayout());
GridPane gp = new GridPane(5, 5);
frame.add(gp, BorderLayout.EAST);
frame.setVisible(true);
frame.setSize(250, 250);
}
}
class GridPane extends JPanel {
public GridPane(int row, int col) {
setLayout(new GridLayout(row, col));
setPreferredSize(new Dimension(125, 125));
setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
for (int i = 1; i <= (row * col); i++) {
JPanel pan = new JPanel();
pan.setBackground(Color.RED);
pan.setPreferredSize(new Dimension(3, 3));
pan.setBorder(BorderFactory.createLineBorder(Color.BLACK));
add(pan);
}
}
}
Useful links:
A Visual Guide to Layout Managers
How to Use BorderLayout
How to Use GroupLayout