引用包：

swt.jar

主类：

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.ShellAdapter;

import org.eclipse.swt.events.ShellEvent;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.MessageBox;

import org.eclipse.swt.widgets.Shell;

public class Z {

public static void main(String[] args) {

final Display display = new Display();

final Shell shell = new Shell();

shell.setText("aaa");

shell.setSize(250, 150);

shell.addShellListener(new ShellAdapter() {

@Override

public void shellClosed(ShellEvent e) {

MessageBox mb = new MessageBox(shell,SWT.ICON_QUESTION | SWT.OK| SWT.CANCEL);

mb.setText("提示");

mb.setMessage("确定要关闭吗?");

int rc = mb.open();

if (e.doit == (rc == SWT.OK)) {

System.exit(0);

}

else if(e.doit == (rc == SWT.CANCEL)) {

return;

}

}

});

final Button button = new Button(shell, SWT.NONE);

button.setBounds(50, 20, 100, 25);

button.setText("button");

// 监听button的事件，当用户点击时调用Popup类显示popup界面。

button.addSelectionListener(new SelectionAdapter() {

public void widgetSelected(SelectionEvent e) {

// 实例化popup类，构造函数为popup界面中出现的提示信息。

Popup popup = new Popup("更新信息");

popup.start();

}

});

shell.open();

while (!shell.isDisposed()) {

if (!display.readAndDispatch()) {

display.sleep();

}

}

display.dispose();

}

}

方法类：

import org.eclipse.swt.SWT;

import org.eclipse.swt.graphics.Rectangle;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Text;

public class Popup extends Thread {

Shell shell;

protected int moveStep = 2; // 每次移动的pixel

protected int upPosition; // 能移动到的最上面坐标

protected int downPosition; // 当前popup的边框坐标

protected int leftPosition; // popup左边边框坐标

public Popup(String message) {

// TODO Auto-generated constructor stub

shell = new Shell(SWT.ON_TOP);

Text text = new Text(shell, SWT.MULTI | SWT.WRAP);

text.setBounds(10, 20, 180, 80);

text.setBackground(shell.getBackground());

text.setText(message);

// 取屏莫大小

Rectangle area = Display.getDefault().getClientArea();

upPosition = area.height - 100;// 计算出popup界面在屏幕显示的最高位置

downPosition = area.height + 100;// 计算出popup界面的初始位置

leftPosition = area.width - 180;

shell.setSize(180, 100);

// 初始化popup位置

shell.setLocation(leftPosition, downPosition);

shell.open();

}

public void run() {

Display display = shell.getDisplay();

while (true) {

try {

Thread.sleep(10);

// 判断当前位置是否小于能出现的最高位置，小于的话就说明还可以向上移动。

if ((downPosition - moveStep) > upPosition) {

display.asyncExec(new Runnable() {

public void run() {

shell.setLocation(leftPosition, downPosition - moveStep);

downPosition -= moveStep;

}

});// 此时已经移动到了最高位置，显示5秒钟后，关闭窗口并退出。

} else {

Thread.sleep(5000);

display.asyncExec(new Runnable() {

public void run() {

shell.dispose();

}

});

}

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}

shell 窗口关闭时出现是否关闭提示：