jpanel

Adding JPanel from another class to JPanel in JFrame

空扰寡人 提交于 2019-11-30 09:05:43
I can't get my JFrame from main class to display JPanel from another class. Everything compiles without errors. JFrameTest.java: package jframetest; import java.awt.FlowLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class JFrameTest extends JFrame { public JFrameTest() { FlowLayout mainLayout = new FlowLayout(); setSize(320, 480); setResizable(false); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLayout(mainLayout); JPanel panelMain = new JPanel(mainLayout); JButton testButton = new JButton("Test12"); panelMain.add(testButton); JPanelOne

Why will BoxLayout not allow me to change the width of a JButton but let me change the height?

泪湿孤枕 提交于 2019-11-30 08:16:47
I'm trying to get the Layout of a JDialog of mine to fit a particular look that a program in which I'm porting to Java has, I've used several LayoutManagers before with great success yet for some reason I cannot seem to get this working at all. My goal is to have the Right (East) side of the JDialog contain a "Find Next" and "Cancel" button in a top-down order and then any extra space below so that the two buttons are always at the top of the JDialog , yet for some reason BoxLayout is continously ignoring any attempts at changing (this is where I'm lost) the width of a JButton . Code follows.

Scrolling a JPanel

情到浓时终转凉″ 提交于 2019-11-30 07:57:42
问题 I want a JPanel with a size and defined position. Inside the JPanel, I've certain number of elements (buttons) inserted horizontally. Because my JPanel has a defined width, if I add much buttons, I couldn't see that. In this case, I need a scrollbar for this JPanel. But this JPanel must be a CERTAIN SIZE IN A CERTAIN POSITION inside a JFrame. The scrollbar of the JPanel has positioned under it horizontally. Someone can help me? I've tried it without success! 回答1: Use a JScrollPane and force

Adding components into JPanel inside a JFrame

淺唱寂寞╮ 提交于 2019-11-30 07:49:35
问题 Since im a beginner and i don't want to get involved with the layout managers, i was simply adding a JPanel into my main JFrame and giving spesific location to each component in the panel. But somehow the output appears way too wrong.. frame = new JFrame(email + " (Offline)"); frame.setSize(400, 400); frame.setLocation(0, 0); frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); frame.setLayout(new FlowLayout()); frame.addWindowListener(new WindowAdapter() { public void windowClosing

How to overlay, resize and centre a component on a JPanel?

对着背影说爱祢 提交于 2019-11-30 05:25:17
问题 I've spent a while reading and experimenting here, and come up with a few approaches, but not got any of them to work completely yet, so I would like to know what more experienced Swing programmers would do. The main window of my application contains a custom subtype of JPanel, which is used to display an image calculated from a mathematical function. This can take some time to calculate, so while this happens I display a text message and a progress bar superimposed on the middle of the panel

How to layout multiple panels on a jFrame? (java)

若如初见. 提交于 2019-11-30 05:08:05
I am in the process of making my own java socket game. My game is painting alright to the full screen (where it says "paint graphics here", but im painting to the whole jframe at the moment). I want to add a textbox with a scroll bar for displaying only text, not taking any input and another textbox to take text inputs from the user and then a button to send the text, for chat purposes. But onto my question, how do I even start to lay this out? I understand I need a layout, but can someone help me on this? Here is my code at the moment (this code only sets up painting to the whole screen at

Align text in JLabel to the right

爷,独闯天下 提交于 2019-11-30 04:12:17
I have a JPanel with some JLabel added with the add() method of JPanel. I want to align the JLabel to the right like the image below but I don't know how to do that. Any Idea? Thanks! This can be done in two ways. JLabel Horizontal Alignment You can use the JLabel constructor : JLabel(String text, int horizontalAlignment) To align to the right: JLabel label = new JLabel("Telephone", SwingConstants.RIGHT); JLabel also has setHorizontalAlignment : label.setHorizontalAlignment(SwingConstants.RIGHT); This assumes the component takes up the whole width in the container. Using Layout A different

How can I paint in an specific JPanel when more than one in same frame- Java

让人想犯罪 __ 提交于 2019-11-29 18:37:32
Updated - this is related with the following link I posted yesterday. https://stackoverflow.com/questions/15916360/swing-gui-application-in-java-with-multiple-frames I apologize if I am doing something wrong here, I tried to write in my previous post and I couldn't find a way to do it beyond the comments box. I did some changes on my code, now I am working with 3 JPanels. I created a class for each panel except the main one that will hold in a CardLayout the other two. The main panel is created in my main class and application at the same time. Now I am trying to paint a happy face in one of

What are the benefits to painting on a JPanel vs. JComponent?

烂漫一生 提交于 2019-11-29 18:23:14
问题 So in a recent answer, someone commented this (in regards to painting): "This is probably some kind of illness of 90% of Swing Programmers: When they make their own component, they always extend JPanel instead of JComponent. Why?" I'm still fairly new to programming, so I think it's too early to call myself a Swing programmer, as I have yet to find my niche. But overriding JPanel is just the way I was taught. So I set out to find the answer to the "Why?" question of the commenter. These are

Width and height of a JPanel are 0 (Specific Situation)

纵然是瞬间 提交于 2019-11-29 18:15:11
Please pardon me if this is hard to follow, but I have a specific problem that I need help solving. I have done a ton of research, and I have tried numerous solutions but none of them are working. My issue is that I have an ImagePanel class that is extending JPanel (code below), this class needs to use width and height to scale images (I am making a program where users can create custom tutorials including images). When I instantiate this I get an error saying that the width and height must be nonzero. I understand that this is because the layout manager has not yet passed the ImagePanel a