从ArrayList中每X秒更新一次JLabel< List> - Java [英] Update JLabel every X seconds from ArrayList<List> - Java
问题描述
我有一个简单的Java程序读取一个文本文件，用（空格）分割，显示第一个单词，等待2秒，显示下一个...等等...我想这样做在Spring或其他一些GUI。
I have a simple Java program that reads in a text file, splits it by " " (spaces), displays the first word, waits 2 seconds, displays the next... etc... I would like to do this in Spring or some other GUI.
有关如何轻松更新弹簧字词的建议吗？迭代通过我的列表，不知何故使用setText（）;
Any suggestions on how I can easily update the words with spring? Iterate through my list and somehow use setText();
我没有运气。我使用这种方法打印我的话在控制台和添加JFrame到它...工作伟大的控制台，但提出了无尽的jframe。我发现大部分在线。
I am not having any luck. I am using this method to print my words out in the consol and added the JFrame to it... Works great in the consol, but puts out endless jframe. I found most of it online.
private void printWords() {
for (int i = 0; i < words.size(); i++) {
//How many words?
//System.out.print(words.size());
//print each word on a new line...
Word w = words.get(i);
System.out.println(w.name);
//pause between each word.
try{
Thread.sleep(500);
}
catch(InterruptedException e){
e.printStackTrace();
}
JFrame frame = new JFrame("Run Text File");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel textLabel = new JLabel(w.name,SwingConstants.CENTER);
textLabel.setPreferredSize(new Dimension(300, 100));
frame.getContentPane().add(textLabel, BorderLayout.CENTER);
//Display the window. frame.setLocationRelativeTo(null);
frame.pack();
frame.setVisible(true);
}
}
我有一个用JFrame和JLable创建的窗口，但是，我想让静态文本是动态的，而不是加载一个新的弹簧窗口。我想它闪一个字，消失，闪一下字消失。
I have a window that get's created with JFrame and JLable, however, I would like to have the static text be dynamic instead of loading a new spring window. I would like it to flash a word, disappear, flash a word disappear.
有关如何更新JLabel的任何建议？有什么重绘（）？我画一个空白。
Any suggestions on how to update the JLabel? Something with repaint()? I am drawing a blank.
感谢！
UPDATE：
下面的亲切的人，我得到它正确打印到控制台。这是我的打印方法：
UPDATE: With the help from the kind folks below, I have gotten it to print correctly to the console. Here is my Print Method:
private void printWords() {
final Timer timer = new Timer(500, null);
ActionListener listener = new ActionListener() {
private Iterator<Word> w = words.iterator();
@Override
public void actionPerformed(ActionEvent e) {
if (w.hasNext()) {
_textField.setText(w.next().getName());
//Prints to Console just Fine...
//System.out.println(w.next().getName());
}
else {
timer.stop();
}
}
};
timer.addActionListener(listener);
timer.start();
}
但是，它不更新lable吗？我的结构看起来像：
However, it isn't updating the lable? My contructor looks like:
public TimeThis() {
_textField = new JTextField(5);
_textField.setEditable(false);
_textField.setFont(new Font("sansserif", Font.PLAIN, 30));
JPanel content = new JPanel();
content.setLayout(new FlowLayout());
content.add(_textField);
this.setContentPane(content);
this.setTitle("Swing Timer");
this.pack();
this.setLocationRelativeTo(null);
this.setResizable(false);
//_textField.setText("loading...");
}
我，或谁帮助我，得到它的工作。再次感谢！
Getting there... I'll post the fix once I, or whomever assists me, get's it working. Thanks again!
推荐答案
首先，构建并显示您的GUI。一旦显示GUI，请使用 javax.swing.Timer 每500毫秒更新GUI：
First, build and display your GUI. Once the GUI is displayed, use a javax.swing.Timer to update the GUI every 500 millis:
final Timer timer = new Timer(500, null);
ActionListener listener = new ActionListsner() {
private Iterator<Word> it = words.iterator();
@Override
public void actionPerformed(ActionEvent e) {
if (it.hasNext()) {
label.setText(it.next().getName());
}
else {
timer.stop();
}
}
};
timer.addActionListener(listener);
timer.start();
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