e**n
发帖数: 10 | 1 I wrote a small program to display Chinese, but I can not display Chinese
correct.
Here is my code:
try
{
String s1 = "讨论";
JLabel jlTemp = new JLabel("Display: " + s1);
}
catch(Exception e)
{
}
In this case, the JLabel display garbage on the screen.
try
{
String s1 = "讨论";
String s2 = new String(s1.getBytes(), "GBK");
JLabel jlTemp = new JLabel("Display: " + s2);
}
catch(Exception e)
}
In this case, the JLabel display "????" on the screen.
Can someone tell me where my proble |
|
v****c
发帖数: 32 | 2 一个Java applet小程序中 加了以下内容后产生的class文件在浏览器中工作不正常。
why? xiexie hui fu.
//set up text label
textL = new JLabel();
textL.setText( "Welcome to the park!" );
textL.setLocation(25,0);
textL.setSize(550,210);
textL.setFont(new Font("Arial",Font.PLAIN,36));
textL.setHorizontalAlignment(JLabel.CENTER);
contentPane.add(textL);
//set up picture label
pictureL = new JLabel();
pictureL.setIcon(new ImageIcon( "fun.jpg" ));
pictureL.setBounds(54,120,500,250) |
|
c****u
发帖数: 3277 | 3 I tried to draw a graph on a jpanel, then put jtextareas and
jlabels onto that jpanel, the textareas and jlabels form an area, which
always cover my grphics completely and mess it up. Any solution? |
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n*******g
发帖数: 168 | 4 final JLabel label = new JLabel("nonothing")
这里的一个类实例被声明为final代表什么呢？
多谢！ |
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z*********e
发帖数: 10149 | 5 I'm following this java tutorials- Getting Started WIth Applets
here are my files:
======================================
HelloWorld.java
import javax.swing.*;
import java.lang.reflect.InvocationTargetException;
public class HelloWorld extends JApplet{
public void init(){
try {
SwingUtilities.invokeAndWait(new Runnable(){
public void run(){
JLabel label = new JLabel("Hello World!");
add(label);
}
... 阅读全帖 |
|
G****A
发帖数: 4160 | 6 问题1:
assume that WhiteOnBlackLabel inherits a paint method from JLabel and also
implements its own version of paint.
JLabel label = new WhiteOnBlackLabel("A label");
label.paint(g); //for some Graphics object g
Which of those two implementations of paint will be executed in
label.paint(g); of this example?
paint() defined in label or paint() defined in WhiteOnBlacklabel?
问题2:
All of our Fruits inherit an equals method from class Object. Suppose that
Fruit declares its own equals method:
Object> |
|
b***i
发帖数: 3043 | 7 比如，按下一个按钮要打开文件，能用你这个多线程读入文件吗？给个具体例子吧。
程序就叫FMPTest，extends JFrame,里面有一个JLabel,一个JButton, 要求点击
JButton打开FileDialog，选好文本文件后，用FMP线程读入，然后在JLabel里面显示
Good出现的次数。要求不能在UI线程里面读入文件。
FMP |
|
o**2
发帖数: 168 | 8
这里是完整的可运行的代码。需要的FMP库在： http://search.maven.org/#browse|1968728870
import com.fastmessenger.impl.GuiMessenger;
public class Main {
public static void main (String[] args) {
GuiMessenger messenger = new GuiMessenger ();
FMPTest win = new FMPTest (messenger);
FileAnalyzer analyzer = new FileAnalyzer (messenger);
messenger.registerSwingReceiver (win, "main.frame", "setStatus");
messenger.registerReceiver (analyzer, "file.analyzer", "countWord");
w... 阅读全帖 |
|
d******n
发帖数: 83 | 9 I only know to paint an applet. And I know there is a method named
paintComponent(Graphics page) which belongs to JComponent. But I have no idea
how to paint on a Jpanel or Jlabel. Any idea? THANKS!!! |
|
r*******w
发帖数: 121 | 10 1。根据图设计class hierarchy, 那个一个一个方块的图是class，旁边1..*, 0..1是什
么意思啊？还有方块里面-name, +salary又是什么意思啊？实线虚线呢？
2。String test=new String("hello") 为什么不efficient啊
3。swing的thread safe问题(该去哪里看书呢？)。下面这个code多线程访问可能出问题
。。。怎么修改呢？是说换一个class呢，还是要加synchronization，自己加个类似cond
ition variable的东东？
public class UpdateStatus implements Runnable {
private JPanel myPanel;
public UpdateStatus(JPanel panel) {
myPanel = panel;
}
public void run() {
myPanel.add(new JLabel("90%"));
}
}
4。还是String的efficiency的问题。。。有一个Vector里面都是Stri |
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g*****g
发帖数: 34805 | 11 Only means you can't assign label to another instance.
if you later on do
label = new JLabel("something"), it will yield compilation error.
You can do label.setxxx() and change its fields however. |
|
g*****g
发帖数: 34805 | 12 贴图，比如说用一个带icon的JLabel来显示车，
while(..) {
setLocation(newLocation);
sleep(xx);
repaint();
} |
|
|
p**i
发帖数: 100 | 14 问一下，我想从 jdilog 扩展写个对话框出来，但是发现想 add jpanel的时候怎么也
加不上，但是 jbutton jlabel 可
以，在网上发现别人的例子是可以加的，代码也差不多？有大虾知道为什么吗？
大家做复杂点的对话框怎么做？ |
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Z****e
发帖数: 2999 | 15 does ur use case require a textpane? or a readonly component will do?
maybe you can try JLabel with HTML content |
|
d*****l
发帖数: 8441 | 16
好像解决了，不过没有显式地用另外的线程，用的定时器和Model对话框:
final JDialog dialog = new JDialog(this, "Auto-Close Dialog");
Timer timer = new Timer(50, new ActionListener() {
public void actionPerformed(ActionEvent e) {
dialog.setVisible(false);
dialog.dispose();
}
});
timer.setRepeats(false);
timer.start();
dialog.add(new JLabel("Generating Documents ..."));
dialog.setVisible(true); // modal dialog: applicat... 阅读全帖 |
|
R***Z
发帖数: 1167 | 17 赫赫, 都看见JLabel了, 当然是Java |
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h*****4
发帖数: 4219 | 18 课上刚分析过，据说是在anonymous inner class里面，对这个变量的处理其实是当作
常量了，所以要锁定住。
比方说弄了个GUI，在Jlabel那里要显示一个String，当你运行了GUI之后，这个String
就不应该由外界改变了。 |
|
h*****4
发帖数: 4219 | 19 课上刚分析过，据说是在anonymous inner class里面，对这个变量的处理其实是当作
常量了，所以要锁定住。
比方说弄了个GUI，在Jlabel那里要显示一个String，当你运行了GUI之后，这个String
就不应该由外界改变了。 |
|
