invokeLater和invokeAndWait的區(qū)別
invokeLater:在把可運行的對象放入隊列后就返回，而invokeAndWait一直等待已啟動了可運行的run方法才返回。如果一個操作在另外一個操作執(zhí)行前必須從一個組件獲得信息，則invokeAndWait方法很有用的。
public class SwingDemoInvokeAndWait { public static void main(String[] argv) throws InterruptedException, InvocationTargetException { SwingUtilities.invokeAndWait(new Runnable() { @Override public void run() { constructUI(); } }); final Runnable doHelloWorld = new Runnable() { public void run() { System.out.PPThread = new Thread() { public void run() { try { SwingUtilities.invokeAndWait(doHelloWorld); } catch (Exception e) { e.printStackTrace(); } System.out.println("Finished on " + Thread.currentThread()); } }; appThread.start(); } private static void constructUI() { JLabel bulletin = new JLabel("Hello,World!", JLabel.CENTER); JFrame frame = new JFrame("Bulletin"); frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(bulletin); frame.setSize(200, 150); frame.setVisible(true); bulletin.setForeground(Color.RED); } }由于doHelloWorld是在invokeAndWait中被執(zhí)行的，所以 一定會等待doHelloWorld方法的執(zhí)行并返回，即”Hello World on”一定會在”Finished on”前顯示出來。
import java.awt.Color; import java.lang.reflect.InvocationTargetException; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.SwingUtilities; public class SwingDemoInvokeLater { public static void main(String[] argv) throws InterruptedException, InvocationTargetException { final Runnable doHelloWorld = new Runnable() { public void run() { System.out.println("Hello World on " + Thread.currentThread()); } }; Thread appThread = new Thread() { public void run() { try { SwingUtilities.invokeLater(doHelloWorld); } catch (Exception e) { e.printStackTrace(); } System.out.println("Finished on " + Thread.currentThread()+",but this might well be displayed before the other message."); } }; appThread.start(); } private static void constructUI() { JLabel bulletin = new JLabel("Hello,World!", JLabel.CENTER); JFrame frame = new JFrame("Bulletin"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(bulletin); frame.setSize(200, 150); frame.setVisible(true); bulletin.setForeground(Color.RED); } }由于doHelloWorld是在invokeLater中被執(zhí)行的，因而“Finished on”有可能出現(xiàn)在其他信息的前面比如”Hello World On”。
參考文章：http://developer.51cto.com/art/201201/313034.htm http://blog.csdn.net/legendmohenote/article/details/5853833 http://blog.csdn.net/yanwushu/article/details/39434159
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