Swing/AWT/SWT :: Image Not Being Displayed In Jpanel

Feb 19, 2014

Trying to get an image to display in a GUI.

try {
ByteArrayInputStream in = new ByteArrayInputStream(
transferWorker.bOutput
.toByteArray());
BufferedImage bufferedImage = ImageIO
.read(in);

[Code] ....

But nothing is happening in the GUI. I have stepped through and bufferedimage contains the data, but its not being displayed. Whats happening is, an image is being transmitted to serial port of laptop, so i'm taking it in and storing it in a BufferOutputStream and then trying to open it in my GUI class.

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Sir, I'am new to Swing Programming. I have to create an application where an image is displayed on one Label. The same image has to be split in parts and stored in database pert wise. Later the user has to retrieve the entire image by viewing a small part of the image. I have already displayed the full image on the Label, now i don't know how to split the image and store it part wise in the database.

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import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Dimension;

[code]...

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Apr 12, 2014

I'm simply trying to make a gui for managing images for my purpose, but i fall at the first step: I'm actually not able to display an image, whether it would be a .gif or .jpg ....

//--------MY PANEL FOR VIEWING IMAGE---------
package graph2D;
 
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Toolkit;
import javax.swing.JPanel;
class PannelloConImmagine extends JPanel {
private Image miaImmagine;
 
[Code] .....

it is supposed that i placed the image "pippo.gif" in my project "src" folder, isn't it? anyway I tried to add a new folder to my build Path, and place pippo.gif on it, but it doesn't work.

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I am trying to set a picture in the background of my GUI. I had already made the GUI with the all the required buttons and labels. So I was trying to separately make a class which extends JPanel and add a picture to a panel by overriding the paintComponent() method, and then added it to a frame (I did not set the default layout of the frame, so it was the default...), and it worked very fine. Here is the code:

Java Code:

private BufferedImage image;
public ParentPanel() {
try {
image = ImageIO.read(getClass().getResource("/com/dev_nna/scheduler/UI/1405188.png"));
} catch (IOException ex) {
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[code]....

Then I needed to add this panel with background picture to the background frame of my already made frame with all the buttons on it.The layout of the parent frame of my GUI was BorderLayout(50, 50), panels (with buttons) were added to it n the north and south positions.

Then I tried to add a JPanel with the background image to the parent frame (of my GUI), (I wanted it to elapse the entire frame, and come under all the buttons and controls, which were only present in the north and south positions of the border layout), and then the panels holding the buttons to the north and south postions of this panel, everything disappeared.

If I don't do anything except adding this panel with the background image to the parent frame, it only takes up the place not taken up by the two panels on the frame (Border Layout)

how to add this panel to the parent frame of my GUI such that it elapses the entire parent frame's background, and the panels containing the buttons should sit on it.

IMPORTANT PARTS OF CODE:-
Java Code:
//TOP LEFT PANEL
JPanel topleftpanel = new JPanel(new FlowLayout(FlowLayout.LEFT, 5, 5));
parentPanel_top.add(topleftpanel);
topleftpanel.setOpaque(false);

[code]....

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import java.awt.*;
import javax.swing.*;
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[Code].....

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[Code] ....

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For the following code.When I run it ,I am getting the image and Login written along with it , but not getting the preselected radio button

import javax.swing.*;
public class MyJFrameWithJRadioButton extends JFrame
{
JRadioButton rdButton;
public MyJFrameWithJRadioButton()
{
setTitle("This is a JFrame");
setBounds(0, 0, 200, 200);
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[code]....

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In my program one of the panel has a background image and I need that background image to be updated/refresh or changed whenever the panel reaches certain number of clicks

here's the code

Constructor/gui
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;;
 public class demo { 
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[code].....

also is there other way to access those static variables? the way i implemented them works but i do think there are other ways that are more suitable or better but i cant figure out.

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import javax.swing.*;
import java.util.*;
import java.awt.*;
public class HomePage
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JFrame frame;
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[Code] .....

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I have a Jframe and i want to add inside 4 different jpanel.This is easy.

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I have try with BorderLayout but not working.

It's a wizard like but not the same.

I have a jpanel with jbuttons jpanel with a jtable jpanel with textarea and jpanel with jlabels. All this have to change with other 4 jpanels, where to look?

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How can I make a call to paintComponent within the JPanel-class, from another Class?

In class TestClass:

public class TestClass {
public TestClass() {
JFrame frame = new JFrame();
frame.setLayout(new BorderLayout());
frame.setSize(500,500);
initComponents();

[Code] .....

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I have been trying to create a chat client which makes use of a scrollable jpanel and at runtime adds JTextFields to the panel.

Panel Initialising

msgPanel = new JPanel(new MigLayout());
msgPanel.setPreferredSize(new Dimension(400,335));
JScrollPane msgPanelScroll = new JScrollPane(msgPanel);
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[Code] .....

But now Im facing the following issues. The text field aligns to the center of the panel & on adding more fields the panel accommodates as it can and does not begin scrolling.

Screenshots attatched

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I pick this code from Head first Java

package GUI;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.Color;
public class gui5 {
int x=0;
int y=0;
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[code]...

but just a Jframe is appearing no Jpanel no green color circle?What is wrong with code

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I am try to do an application based in multiples JFrames, each one with its particular responsibilities, and use one JPanel as a menu with buttons that connect one JFrame to another, But this menu is instantiated at run in view (layout made by netbeans) the Main Jframe appears with its internal JPanel, but the instantiated JPanel does not appear or does not show it's buttons. (notice only run method in the second class):

JPanel Menu that will be used in all alone JFrames of application:

public class MenuSuperior extends javax.swing.JPanel {
public MenuSuperior() {
initComponents();
} private void initComponents() {

[Code] .....

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Let me explain by simplifying the GUI to a simple frame in which I have a JCheckbox and a JPanel mypanel.mypanel has a Textfield tf,JComboBox cmb as it's components.So now if I deselect the JCheckbox, all the components in the mypanel should be disabled. I used a code like:

[code]mycheckbox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
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mypanel.setEnabled(true); else
mypanel.setEnabled(false); } });[code]

but the components inside the panels are not disabled. In my actual program I have a large number of different kinds of components in mypanel.So disabling/enabling each of them on each actionPerformed of the mycheckbox will be laborious. Isn't there any way by which I can disable/enable the mypanel to disable/enable all the components in it?

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MainViewClass:
...
private void initComponents() {
...
MenujPanel = new MenuSuperior();
MenujPanel.setBorder(
BorderFactory.createTitledBorder("Dados Pessoais"));

[Code] .....

Here is the video:

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I need to add 2 JLists inside a JPanel for a crossword. The JPanel is located SOUTH and I'm using BorderLayout in the constructor to locate the JPanel.

The problem is, I can't see the 2 JLists inside the JPanel. For some strange reason the JLists appear in the center where the crosswordPanel is, even though the clues JPanel method is located SOUTH.

package crossword;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;

[code]....

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I am trying to add buttons in a loop to my but when i compile my program i can`t see my buttons. I can see other stuff that added to jpanel ...

static JButton blocks[][];
for (int i = 0; i < block.length; i++) {
for (int j = 0; j < block[i].length; j++) {
block[i][j] = new Block(i, j);
blocks[i][j] = new JButton(i+"");
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}
}

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I have used the following code and I am trying to render a String in the JPanel. The text is getting displayed in the mirror image format.

I understand that there is a problem with .scale(), not able to get an idea about the corrective step. Please run the below class.

class Surface extends JPanel {
final int PAD = 40;
private void doDrawing(Graphics g)
{
Graphics2D g2d = (Graphics2D) g.create();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);

[Code] ....

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