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();
}
}
}
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。
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：
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();
}
}
结果：
运行的效果，label中“<<<Runn”，“<<Runni”，“<Runnin”，“Running”交替出现，给人一种动态的效果。