swing

问题 In my program it opens a window if an action is happened. After I have filled out information in this window, and entered a button, the window dispose(). The window is picked up in a program outside my main program, but when I close this window, my main program stops. How can I prevent this from happening? Thanks for your help! 回答1: You can set the defalaultCloseOperation property of the second frame to DO_NOTHING_ON_CLOSE or DISPOSE_ON_CLOSE Don't even use two frames. Use a modal JDialog

问题 I am trying to set the label in a java program to an image. It seems, however, that it does not work for .bmp images I am looking for a converter which will allow me to convert an image from a .bmp to a .jpg with the same file name. This converter needs to be controlled by the java program, which has the name and location of the image that needs to be converted. Any help would be greatly appreciated as I have spent hours on this :P Thanks *Edit: The program needs to be able to be packaged

问题 I am trying to set the label in a java program to an image. It seems, however, that it does not work for .bmp images I am looking for a converter which will allow me to convert an image from a .bmp to a .jpg with the same file name. This converter needs to be controlled by the java program, which has the name and location of the image that needs to be converted. Any help would be greatly appreciated as I have spent hours on this :P Thanks *Edit: The program needs to be able to be packaged

问题 I'm simulating dummy real-time data using DynamicTimeSeriesCollection, like this. During random intervals, the data being passed to the plot should 'dropout' to simulate a network connection loss. At this point, this plot should stop drawing and only start plotting the data after the dropout has subsided. I subclassed XYLineAndShapeRenderer and overrode the getItemLineVisible() method: @Override public boolean getItemLineVisible(int series, int item){ if(offline){ return false; }else{ return

问题 What's the best way to get a value of a TextArea after a key is typed, including this character? If I do it in the even listener, textarea.getText() returns the value without the eventual new char. Basically I see two ways: postponing processing with something like invokeLater(). I would prefer a solution without threads. figuring out where to put the char into the text, based on the carret position. Is there any other, simpler? Thanks. Edit: This is what I have: JTextArea textarea =

问题 [EDIT] Based on this example, I am now able to collect data and display it in a chart. I don't know exactly how to integrate that code that generates the chart into my application. /** @see http://stackoverflow.com/questions/5048852 */ public class Atol extends ApplicationFrame { private static final String TITLE = "Dynamic Series"; private static final String START = "Start"; private static final String STOP = "Stop"; private static final float MINMAX = 100; private static final int COUNT =

问题 I am having difficulty in aligning Swing elements flow below each other. Using GridLayout does not help me because it divides screen to rows which have equal sizes. I need to put one component to each row and the next component should be in very bottom of the last component. Mi problem is that if the choices of the question are more than one line, this layout squeeze them to the rows and there is a huge gap between picture and question "3+3?" 回答1: You can use GridBagLayout for this. It is

问题 I am trying to add a border to a Rectangle element and for some reason it will not work, is it not compatible with JFrame ? I can set my entire JFrame to having a border, but it can't find setBorder with my rectangles. Here is my code: package trivia; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.Rectangle; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.border

问题 I want my panel to fit the frame when I show/hide fields. How could I notify to the parent frame to revalidate? I thought about pass the frame to my panel's constructor, but I think may have a way this is already done. I remember that there was a protected attribute in JPanel, but there isn't.. maybe i remembering the wrong component. 回答1: I need show/hide some fields of my panel, and I want the panel to fit the frame. You mean like a summary/details view and you want the frame size to change

问题 I m using the following loop , but its only typing the first charecter and the rest as numbers, any idea ? import java.awt.*; import javax.swing.KeyStroke; public class test { public static void main(String[] args) throws AWTException { Robot r = new Robot(); String s = "Face"; for (int i = 0; i < s.length(); i++) { char res = s.charAt(i); r.keyPress(res); r.keyRelease(res); r.delay(1000); } } } OUTPUT typing : F135 回答1: The keyPress/Release methods need an int value that represents the