用滚动的字符表示Task的运行，比较ProgressMonitorDialog
JFace中的提供的ProgressMonitorDialog对话框，来表示正在运行的Task，还是比较方便，可设置一共的Task有多少步，现在完成了多少，还有多少没有完成的。
来个例子吧：
public class TT {static ProgressMonitorDialog dialog;public static void main(String[] args) {IRunnableWithProgress runnable = new IRunnableWithProgress() {public void run(IProgressMonitor monitor) {//monitor.beginTask("begin" + "...... ",10);monitor.beginTask("begin" + "...... ",IProgressMonitor.UNKNOWN);monitor.setTaskName("Running cmd XXXX.");int i = 0;while(i++ < 10) {if(monitor.isCanceled()) {monitor.setTaskName("Canceled cmd XXXX.");break;}try {Thread.sleep(1000);monitor.setTaskName("Running cmd XXXX.");monitor.subTask("Running step " +i + " .");monitor.worked(1);} catch (InterruptedException e) {e.printStackTrace();}}monitor.done();}};try {dialog = new ProgressMonitorDialog(null);dialog.run(true, true, runnable);} catch (Exception e2) {e2.printStackTrace();}}}?
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使用IProgressMonitor.UNKNOWN参数，是不知道Task有多少步，Dialog是程序级的对话框，也就模式对话框了。
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有的时候想搞一些特别的东东来表示程序中有Task正在运行，这里采用滚动的标记字符来表示Task的运行：
例子：
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public class Tsdf {public static Timer t;static Display display = Display.getDefault();public static void main(String[] args) {Shell shell = new Shell();shell.setBounds(10,10,150,150);shell.setLayout(new RowLayout(SWT.VERTICAL));final Label l = new Label(shell, SWT.NONE);l.setText("Running");final String s = "<<<" + l.getText();final int[] index = new int[]{0};Button brun = new Button(shell, SWT.NONE);brun.setText("run");Button bstop = new Button(shell, SWT.NONE);bstop.setText("stop");brun.addSelectionListener(new SelectionAdapter() {public void widgetSelected(SelectionEvent e) {if(t != null) {return;}t = new Timer(true);t.scheduleAtFixedRate(new TimerTask() {public void run() {System.out.println("running time " + System.currentTimeMillis());display.asyncExec(new Runnable() {public void run() {index[0] = (index[0]<3)?index[0]+1:0;if(!l.isDisposed()) {l.setText(s.substring(index[0], s.length()-3+index[0]));}}});}}, 0, 300);}});bstop.addSelectionListener(new SelectionAdapter() {public void widgetSelected(SelectionEvent e) {if( t == null)return;t.cancel();t = null;l.setText("stop");System.out.println("Stop time " + System.currentTimeMillis());}});shell.open();while (!shell.isDisposed()) {if (!display.readAndDispatch()) display.sleep();}display.dispose();}}?
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结果：
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运行的效果，label中“<<<Runn”，“<<Runni”，“<Runnin”，“Running”交替出现，给人一种动态的效果。
1 楼 lizhensan 2011-09-10 为什么我的进度条不懂呢？拷贝你的代码 2 楼 xmind 2011-09-22 是代码一还是代码二？