jlabel

问题 I am trying to reset an array of JLabels. There are images on the top of the labels so when i press a button the labels are supposed to be reset. I tried to do it like that for(int i=0; i<desks.length; i++) { desks[i].setText(""); rightPanel.add(desks[i]); } so if anyone have an idea it would be great.cheers. 回答1: this is one of possible ways int n = panel.getComponentCount(); if (n > 0) { Component[] components = panel.getComponents(); for (int i = 0; i < components.length; i++) { if

问题 I have a Swing JFrame, which has a bunch of menu items. The below code tries but fails to set the content of the JFrame on selection of 'Add Address' menu item. JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); frame.setVisible(true); JMenuBar menuBar = new JMenuBar(); JMenu clientMenu = new JMenu("Client"); JMenuItem address = new JMenuItem("Add Address"); clientMenu.add(address); menuBar.add(clientMenu); address.addActionListener

问题 Well, I have been working on a piece of code for almost 2 days now and not able to resolve the issue. DESIRED BEHAVIOUR The following code is supposed to display 10 strings one by one (the next replacing the previous one) with a gap of aprox. 200 ms. q1 q2 q3 ...and so on upto q10 This display sequence starts when the user presses ENTER key. REFLECTED BEHAVIOUR The screen waits for aprox. 2 sec after pressing and then shows q10. Some more info The label stringText changes value during

问题 I have this JDialog with a JTabbedPane: I just want to add a JLabel in the right-top area of the JTabbedPane so i can fire some events (e.g close the JDialog). And i don't want to make it a JFrame. PS: I know that is may be duplicated, but none of the responses give me a solution. 回答1: Well, actually that positioning inside JTabbedPane is not supported in Swing. But you can always make some street magic with layouts and layers: public static void main ( String[] args ) { try { UIManager

问题 Is there anyway to add an ID or a unique identifier to a JLabel? Thanks all 回答1: JLabel has a setName method that is inherited from java.awt.Component. You could use this for an ID. 回答2: You can call Component.setName on it, or JComponent.putClientProperty , or subclass or use the JLabel object as a key is a Map of some sort. But probably the way to go is to keep hold of a reference to the original object, so you can write clean, direct code that doesn't have to look the component up. 来源：

问题 I've been trying to setup this border layout for hours. I've looked up How to Use BorderLayout on the Java website but I still haven't gotten it. I've included my code below for review and to make it easier to see how I am trying to use the BorderLayout function. How do I setup a border layout on JL3? class GameStructure { private String []wordList = {"computer","java","activity","alaska","appearance","article", "automobile","basket","birthday","canada","central","character","chicken","chosen

问题 I'm trying to make an experiment in image manipulation. Basically I have an image that is continously updated by a timer and i display that image in a JLabel. My problem is that JLabel does'nt refresh the image. Here is my timer code: Timer timer = new Timer(200, new ActionListener() { public void actionPerformed(ActionEvent e) { count++; System.out.println("timer"); System.out.println(filename); ImageIcon icon = new ImageIcon(filename); label = new JLabel(); label.setIcon(icon); label

问题 I am trying to make a digital clock which displays the time in a JOptionPane. I've managed to display the time on the message dialog box. However, I can't figure out how to make it update the time at every second in the dialog box. This is what I currently have: Date now = Calendar.getInstance().getTime(); DateFormat time = new SimpleDateFormat("hh:mm:ss a."); String s = time.format(now); JLabel label = new JLabel(s, JLabel.CENTER); label.setFont(new Font("DigifaceWide Regular", Font.PLAIN,

问题 My code; package com.test; import java.awt.EventQueue; public class TestGU { private JFrame frame; private JLabel la; /** * Launch the application. */ public void mainM() { EventQueue.invokeLater(new Runnable() { public void run() { try { TestGU window = new TestGU(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } public void redefine(String text){ la.setText(text); frame.repaint(); } /** * Create the application. */ public TestGU() { initialize(); } /**

问题 i am showing simple code sample. I showed an gif image in a Jlabel . When run the programme, TASK manager shows that memory is increasing continuously. Why it happens? Edited: try this code please... on show glass button, glass panel is shown with gif image and a hide glass button in it and with that memory will be started increasing. On clicking hide glass button, glass panel will be hidden and memory increasing will b stopped. @mKorbel : I had debugged it, the constructor will be called