Eclipse开发经典教程：展现组件

public class ProgressBarExample {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new GridLayout());
//添加平滑的进度条 
ProgressBar pb1 = new ProgressBar(shell, SWT.HORIZONTAL | SWT.SMOOTH);
pb1.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
//设置进度条的最小值 
pb1.setMinimum(0);
//设置进度条的最大值 
pb1.setMaximum(30);
//添加自动递增的进度条 
ProgressBar pb2 = new ProgressBar(shell, SWT.HORIZONTAL |
SWT.INDETERMINATE);
pb2.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
//添加线程，在线程中处理长时间的任务，并最终反映在平滑进度条上 
new LongRunningOperation(display, pb1).start();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
}
class LongRunningOperation extends Thread {
private Display display;
private ProgressBar progressBar;
public LongRunningOperation(Display display, ProgressBar progressBar) {
this.display = display;
this.progressBar = progressBar;
}
public void run() {
//模仿长时间的任务 
for (int i = 0; i < 30; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
display.asyncExec(new Runnable() {
public void run() {
if (progressBar.isDisposed()) return;
//进度条递增 
progressBar.setSelection(progressBar.getSelection() + 1);
}
});
}
}
}