Coding a GUI in Java however my labels never seem to appear - java

I am creating a GUI using BlueJ - Java, i have made the entry boxes however i cant seem to add a label to go either above each one or to the left. Could anyone help me out and tell me where im going wrong ? My code is below:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Log extends JFrame {
public static void main(String[] args){
Log frameTabel = new Log();
}
JButton Confirm = new JButton("Confirm");
JPanel panel = new JPanel();
JLabel label1 = new JLabel("Name", JLabel.RIGHT);
JTextField FullName = new JTextField(15);
JTextField Address1line = new JTextField(15);
JTextField postcode = new JTextField(15);
JTextField Destination = new JTextField(15);
JTextField Date = new JTextField(15);
JTextField MilesTravelling = new JTextField(15);
JLabel lblMsg = new JLabel ("Name",JLabel.LEFT);
Log(){
super("Customer GUI");
setSize(300,400);
setLocation(400,250);
panel.setLayout(null);
FullName.setBounds(70,30,150,20);
Address1line.setBounds(70,80,150,20);
postcode.setBounds(70,130,150,20);
Destination.setBounds(70,180,150,20);
Date.setBounds(70,230,150,20);
MilesTravelling.setBounds(70,280,150,20);
Confirm.setBounds(105,320,80,20);
panel.add(lblMsg);
panel.add(Confirm);
panel.add(FullName);
panel.add(Address1line);
panel.add(postcode);
panel.add(Destination);
panel.add(Date);
panel.add(MilesTravelling);
getContentPane().add(label1);
getContentPane().add(panel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
}

JFrames ContentPane uses BorderLayout, BorderLayout has 5th areas and only one JComponent can be placed in the one of areas
.
getContentPane().add(label1); //JFrames CENTER area
getContentPane().add(panel);
then last added JComponent can be visible
.
getContentPane().add(panel);
suggestions don't to use NullLayout and Log frameTabel = new Log(); should be wrapped into invokeLater (Swing GUI should be created and intialized on EventDispatchThread), more to see in Oracle tutorial Initial Thread

Related

Java Swing Glue not working between 2 buttons

I am trying to make my own little game in Java as a personal excercise however I am finding a lot of issues using BoxLayout's in Java Swing.
So I have a basic MVC application and I need two buttons at the top both "New Game" and "Submit" to both be on the same line in the GUI. I have found out that I can use glue to do this however all of the guides I have found on it, do not work. Am I missing something obvious here?
This is my view code (my GUI):
package mvc;
import java.awt.*;
import java.awt.event.ActionListener;
import java.util.Map;
import java.util.Set;
import javax.swing.*;
public class View extends JFrame {
//User input Characters
private JTextField firstChar = new JTextField(1);
private JTextField secondChar = new JTextField(1);
private JTextField thirdChar = new JTextField(1);
private JTextField fourthChar = new JTextField(1);
private JTextField fifthChar = new JTextField(1);
//Displays on GUI
private JButton submitButton = new JButton("Submit");
private JButton newButton = new JButton("New Game");
View() {
JPanel gamePanel = new JPanel();
gamePanel.setLayout(new BoxLayout(gamePanel, BoxLayout.Y_AXIS));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(600, 200);
gamePanel.add(submitButton);
gamePanel.add(Box.createHorizontalGlue());
gamePanel.add(newButton);
gamePanel.add(firstChar);
gamePanel.add(secondChar);
gamePanel.add(thirdChar);
gamePanel.add(fourthChar);
gamePanel.add(fifthChar);
this.add(gamePanel);
}
}
Any help would be massively appreciated!
I have tried using glue and rigid area's to solve this however neither worked. I am expecting both buttons to be on the same line in my GUI
You use Boxlayout, that according to https://docs.oracle.com/en/java/javase/17/docs/api/java.desktop/javax/swing/BoxLayout.html
A layout manager that allows multiple components to be laid out either vertically or horizontally.
In your case it is vertical, and I never used Glue so I am not even aware whether it can change that behaviour.
But you can for sure put the two buttons in an extra panel and add that to your gamePanel, like so:
JPanel buttonBar = new JPanel();
buttonBar.setLayout(new FlowLayout());
buttonBar.add(submitButton);
buttonBar.add(newButton);
gamePanel.add(buttonBar);
BoxLayout can either lay out the components along the X_AXIS or along the Y_AXIS. You cannot mix this two layout directions with a single BoxLayout.
One way to solve your problem is to wrap both buttons in a JPanel and use a BoxLayout(.., BoxLayout.X_AXIS) to lay out this button panel.
You would then add the button panel as the first element of the gamePanel:
package mvc;
import java.awt.*;
import java.awt.event.ActionListener;
import java.util.Map;
import java.util.Set;
import javax.swing.*;
public class View extends JFrame {
//User input Characters
private JTextField firstChar = new JTextField(1);
private JTextField secondChar = new JTextField(1);
private JTextField thirdChar = new JTextField(1);
private JTextField fourthChar = new JTextField(1);
private JTextField fifthChar = new JTextField(1);
//Displays on GUI
private JButton submitButton = new JButton("Submit");
private JButton newButton = new JButton("New Game");
View() {
JPanel gamePanel = new JPanel();
gamePanel.setLayout(new BoxLayout(gamePanel, BoxLayout.Y_AXIS));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(600, 200);
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.X_AXIS));
buttonPanel.add(submitButton);
buttonPanel.add(Box.createHorizontalGlue());
buttonPanel.add(newButton);
gamePanel.add(buttonPanel);
gamePanel.add(firstChar);
gamePanel.add(secondChar);
gamePanel.add(thirdChar);
gamePanel.add(fourthChar);
gamePanel.add(fifthChar);
this.add(gamePanel);
}
}

How to fix the position of the JPanels after expanding the JFrame

I am trying to make the interface of a program using Java Swing. I have a container where I add 3 JPanels with some components. The problem is that when I expand the frame all those 3 JPanels come on the first row one next to another.
Here is my code:
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SpringLayout;
import javax.swing.border.LineBorder;
public class GraphicRefact extends JFrame {
private Container container;
private JButton button2;
private JButton button1;
private JTextField textField01;
private JLabel label01;
private JButton button03;
private JButton button04;
private JTextField textField03;
private JLabel label03;
private JButton button02;
private JButton button01;
private JTextField textField02;
private JLabel label02;
public static void main(String[] args) {
new GraphicRefact();
}
public GraphicRefact() {
initializeComponents();
setTitle("Title");
setSize(500, 150);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
container = new JPanel();
JPanel panel01 = new JPanel();
panel01.add(label01);
panel01.add(textField01);
panel01.add(button2);
panel01.add(button1);
panel01.setBorder(new LineBorder(Color.BLACK, 3));
container.add(panel01);
JPanel panel02 = new JPanel();
panel02.add(label02);
panel02.add(textField02);
panel02.add(button02);
panel02.add(button01);
container.add(panel02);
JPanel panel03 = new JPanel();
panel03.add(label03);
panel03.add(textField03);
panel03.add(button03);
panel03.add(button04);
container.add(panel03);
add(container);
}
private void initializeComponents() {
button1 = new JButton("Open");
button2 = new JButton("Close");
textField01 = new JTextField("Choose the path...");
label01 = new JLabel("Choose File: ");
button01 = new JButton("Button01");
button02 = new JButton("Button02");
textField02 = new JTextField("Choose the path...");
label02 = new JLabel("Choose Dir:");
button03 = new JButton("Button03");
button04 = new JButton("Button03");
textField03 = new JTextField("Choose the path...");
label03 = new JLabel("Choose Dir:");
}
}
Here is how the program looks before and after I expand the frame.
Before:
After:
So, even after I expand the frame, I want the program to leave those 3 JPanels on the middle of cotainer.
Thank you!
You can set the gridLayout and put those elements inside.
JPanel jp = new JPanel();
GridLayout gl = new GridLayout(3,4); //3 rows, 4 columns
jp.setLayout(gl);
After you do this, just put your elements inside layout, by order.
jp.add(label1);
jp.add(button1);
//etc...
You have to use a proper LayoutManager. Look at the examples there. BoxLayout seems to be what you want.
I can't see where you have defined any positions for anything, if you need to read how that's done you can start here
Positioning a JPanel in a JFrame at specific position
The inbuilt layout manger of java swing are not that useful.
You should use this
frame.setLayout(null);
component.setLocation(x, y);
frame.add(component);

Java Button Placement using BorderLayout

This code displays nothing, I have exhausted many avenues but it does not display anything on the GUI (I have a main class that calls this as well already). Please help. I am trying to put the two JButtons horizontally at the bottom of the page and the JTextField and JLabel at the center of the screen.
package test;
import javax.swing.*;
import java.awt.*;
public class Gui extends JFrame {
private JLabel label;
private JButton clear;
private JButton copy;
private JTextField textfield;
public Gui(){
super("test");
clear = new JButton("Clear");
copy = new JButton("Copy");
label = new JLabel("");
textfield = new JTextField("enter text here");
JPanel bottom = new JPanel(new BorderLayout());
JPanel subBottom = new JPanel();
subBottom.add(copy);
subBottom.add(clear);
JPanel centre = new JPanel (new BorderLayout());
JPanel subCentre = new JPanel();
subCentre.add(label);
subCentre.add(textfield);
bottom.add(subBottom, BorderLayout.PAGE_END);
centre.add(subCentre, BorderLayout.CENTER);
}
}
Your code is a bit over-complicated. You only need two panels, centre, and buttons. There are two reasons your UI is not showing up:
You never added the panels to the frame
You never set visible to true(Achieve this by using setVisible(true)), unless you did this in the class you ran it in.
One simple way to achieve your desired UI is like so(I added a main method to show the window):
import javax.swing.*;
import java.awt.*;
public class test extends JFrame {
public Test() {
super("test");
JPanel buttons = new JPanel();
JPanel centre = new JPanel();
add(buttons, BorderLayout.SOUTH); //these lines add the
add(centre, BorderLayout.CENTER); //panels to the frame
JButton clear = new JButton("Clear"); // No need
JButton copy = new JButton("Copy"); // to declare
JLabel label = new JLabel("Label"); // these
JTextField textfield = new JTextField("enter text here"); // privately
buttons.add(copy);
buttons.add(clear);
centre.add(label);
centre.add(textfield);
pack();
setLocationRelativeTo(null);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
} //end constructor
//added main method to run the UI
public static void main(String[] args) {
new Experiments();
} //end main
} //end class
And it shows the window:
I got closer but its not pretty code, the JFrame is 500x500 so this works based on that... any better suggestions than what I have?
package lab6;
import javax.swing.*;
import java.awt.*;
public class Gui extends JFrame {
private JLabel label;
private JButton clear;
private JButton copy;
private JTextField textfield;
public Gui(){
super("test");
clear = new JButton("Clear");
copy = new JButton("Copy");
label = new JLabel("label");
textfield = new JTextField("enter text here");
JPanel masterPanel = new JPanel(new BorderLayout());
JPanel top = new JPanel();
top.setPreferredSize(new Dimension(100, 200));
JPanel bottom = new JPanel();
JPanel subBottom = new JPanel();
subBottom.add(copy);
subBottom.add(clear);
JPanel centre = new JPanel ();
JPanel subCentre = new JPanel();
subCentre.add(label);
subCentre.add(textfield);
bottom.add(subBottom);
centre.add(subCentre);
masterPanel.add(bottom, BorderLayout.PAGE_END);
masterPanel.add(top, BorderLayout.PAGE_START);
masterPanel.add(centre, BorderLayout.CENTER);
add(masterPanel);
}
}

BorderLayout(); buttons not showing up

Hey guys my buttons and textarea will not display on JFrame when compiled, i have tried everything and searched this site but no luck. Any help would be greatly appreciated. Due to them not letting me post without more detail i am just adding this part so i can hit the submit button.
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class DataManager extends JFrame {
private String students[] = {"John Smith","Ken Hanson","Michael Li","John Andersen","Fiona Harris","Angela Lim","Bob London","Sydney Shield","Tina Gillard",
"Ross Brinns","Scott Cairns","Grant Peterson","David Power","Joshua Kane","Alan Newton","Frady Morgan","Quinn Perth"};
private int english[] = {80,52,71,61,39,62,31,46,60,26,77,40,58,38,94,90,97};
private int maths[] = {60,45,77,90,45,55,66,87,31,42,65,55,80,71,51,55,95};
private int total[];
private JButton sortNameButton;
private JButton sortTotalButton;
private JTextField searchTextField;
private JButton statisticsButton;
private JButton exitButton;
private JTextArea infoTextArea;
private JPanel jPan;
public DataManager() {
super("Data Manager ");
jPan = new JPanel();
sortNameButton = new JButton("Sort By Name");
sortTotalButton = new JButton("Sort By Total");
searchTextField = new JTextField("Search");
statisticsButton = new JButton("Statistics");
exitButton = new JButton("Exit");
infoTextArea = new JTextArea();
setLayout(new BorderLayout());
jPan.add(sortNameButton, BorderLayout.NORTH);
jPan.add(sortTotalButton, BorderLayout.NORTH);
jPan.add(searchTextField, BorderLayout.NORTH);
jPan.add(statisticsButton, BorderLayout.NORTH);
jPan.add(exitButton, BorderLayout.NORTH);
jPan.add(infoTextArea, BorderLayout.CENTER);
}
public static void main(String[] args) {
DataManager frame = new DataManager();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800,600);
frame.setVisible(true);
} // End of main method.
} // End of DataManager class
You add your JButtons to the jPan JPanel but never add the jPan to anything -- it must be added to your JFrame, to this to be seen.
jPan.add(sortNameButton);
jPan.add(sortTotalButton);
jPan.add(searchTextField);
jPan.add(statisticsButton);
jPan.add(exitButton);
jPan.add(infoTextArea);
add(jPan); // don't forget this! ************
Note other problems:
You set the JFrame's layout to BorderLayout -- it's already using BorderLayout
You add components to your jPan JPanel with BorderLayout constants, but it's not using a BorderLayout.
If it were, many buttons would not be seen since many are added to the same BorderLayout position and will cover the previous component added there.
In other words, read the tutorials as you're making wrong assumptions.
Better would be something like:
// setLayout(new BorderLayout());
jPan.setLayout(new BorderLayout());
JPanel northPanel = new JPanel(); // **** to hold buttons
northPanel.add(sortNameButton);
northPanel.add(sortTotalButton);
northPanel.add(searchTextField);
northPanel.add(statisticsButton);
northPanel.add(exitButton);
jPan.add(northPanel, BorderLayout.PAGE_START);
jPan.add(infoTextArea, BorderLayout.CENTER);

I cant move the jlabels to the correct location on my panel/GUI java code

i have made a panel/GUI using BlueJ with multiple JLabels and Entry boxes along with a button, however when i execute it the labels appear next to each other and the Confirm button appears on the same row as the last entry box, ive tried changing the coordinates in the code however it doesnt make a difference, how would i go about having each label next to its own entry box and my confirm button at the bottom of the application ?
My code is below:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Log extends JFrame {
public static void main(String[] args){
Log frameTable1= new Log();
}
JPanel panel = new JPanel();
JLabel name = new JLabel("Name", JLabel.LEFT);
JTextField FullName = new JTextField(15);
JPanel panel1 = new JPanel();
JLabel address = new JLabel("Address", JLabel.LEFT);
JTextField Address1line = new JTextField(15);
JTextField postcode = new JTextField(15);
JTextField Destination = new JTextField(15);
JTextField Date = new JTextField(15);
JTextField MilesTravelling = new JTextField(15);
JButton Confirm = new JButton("Confirm");
Log(){
super("Customer GUI");
setSize(300,400);
setLocation(400,250);
panel.setLayout(new FlowLayout());
FullName.setBounds(70,30,150,20);
Address1line.setBounds(70,80,150,20);
postcode.setBounds(70,130,150,20);
Destination.setBounds(70,180,150,20);
Date.setBounds(70,230,150,20);
MilesTravelling.setBounds(70,280,150,20);
Confirm.setBounds(105,290,80,40);
name.setBounds(40,30,150,20);
address.setBounds(40, 80, 150, 20);
getContentPane().add(name);
getContentPane().add(panel);
panel.add(name);
getContentPane().add(address);
getContentPane().add(panel);
panel.add(address);
panel.add(FullName);
panel.add(Address1line);
panel.add(postcode);
panel.add(Destination);
panel.add(Date);
panel.add(MilesTravelling);
panel.add(Confirm);
getContentPane().add(panel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
}
Thankyou

Categories