全部代碼，用的是eclipseimport java.awt.*;import javax.swing.*;public class SizeFrameTest {public static void main(String[] args){EventQueue.invokeLater(new Runnable(){public void run(){SizedFrame frame = new SizedFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);}});}}class SizedFrame extends JFrame{public SizedFrame(){Toolkit kit = Toolkit.getDefaultToolkit();Dimension screenSize = kit.getScreenSize();int screenHeight = screenSize.height;int screenWidth = screenSize.width;setSize(screenWidth/2, screenHeight/2);setLocationByPlatform(true);System.out.println(screenHeight);System.out.println(screenWidth);Image img = kit.getImage("f://素材/燈籠.gif");setIconImage(img);setTitle("我的軟件");}}編譯運行，報錯：Exception in thread "main" java.awt.AWTError: Assistive Technology not found: com.sun.java.accessibility.AccessBridgeat java.awt.Toolkit.loadAssistiveTechnologies(Toolkit.java:809)at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:895)at java.awt.Toolkit.getEventQueue(Toolkit.java:1732)at java.awt.EventQueue.invokeLater(EventQueue.java:1192)at Swing.SizeFrameTest.main(SizeFrameTest.java:7)