我想建立一个Java小程序，叫game ，这是我以前从来没有做过（我总是刚刚建立独立的应用程序）。 我的小应用程序工作正常，当我测试它在Eclipse中，但是当我尝试把它放在我的网站，我在控制台中出现以下错误：
java.lang.reflect.InvocationTargetException
at com.sun.deploy.util.DeployAWTUtil.invokeAndWait(DeployAWTUtil.java:116)
at sun.plugin2.applet.Plugin2Manager.runOnEDT(Plugin2Manager.java:3541)
at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:3072)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1497)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.security.AccessControlException: access denied (java.util.PropertyPermission user.dir read)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:1285)
at java.lang.System.getProperty(System.java:667)
at java.io.UnixFileSystem.resolve(UnixFileSystem.java:118)
at java.io.File.getAbsolutePath(File.java:501)
at game.<init>(game.java:117)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at sun.plugin2.applet.Plugin2Manager$13.run(Plugin2Manager.java:3060)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:682)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:643)
at java.awt.EventQueue$1.run(EventQueue.java:641)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:652)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Exception: java.lang.reflect.InvocationTargetException
它说， access denied (java.util.PropertyPermission user.dir read) ，但我无法揣摩出它试图读的东西掉了用户的文件系统。
它还说， at game.<init>(game.java:117)但我走进我的文件和行114做了一个消息输出到控制台，它从来没有得到书面。 那么我想，也许是一直在寻找内线117 public game()所以我看着为，这是一个鼠标事件侦听器的开始。 这是有道理的，我认为这将是一些Java的需要权限读取，所以我删除了所有的它，然后删除了所有的良好措施的进口。 然后我清除Chrome和Java的缓存和重试。 同样的错误。
- 这是什么意思，我是不是解释它不正确？
- 当它说，线117，它是什么线117？
- 为什么会这样发生？
- 我怎样才能解决这个问题？
- 我怎样才能阻止它的未来？
作为参考，这里是代码public game()
public game() throws MalformedURLException{
JPanel board = new chessboard();
board.setSize(320, 320);
board.setLocation(0, 0);
System.out.println("Got this far");
Piece wp1 = new Piece(wpawn, a2);
...
Piece bk = new Piece(bking, e8);
board.add(wp1);
...
board.add(bk);
wp1.setLocation(wp1.square.getPoint());
...
bk.setLocation(bk.square.getPoint());
add(board);
repaint();
addMouseListener(new MouseAdapter(){
public void mousePressed(MouseEvent evt){
for (int i = 0; i < 8; i++){
for (int j = 0; j < 8; j++){
if (squares[i][j].piece != null)
System.out.println(squares[i][j].getPointString() + ": " + squares[i][j].piece.type);
}
}
Point p = evt.getPoint();
if (0 < p.x && p.x < 319 && 0 < p.y && p.y < 319){
Square clicked = getSquare(p);
System.out.println("up: " + clicked.getPointString());
if (clicked.piece != null){
pickedUp = true;
pickedUpPiece = clicked.piece;
}
}
}
public void mouseReleased(MouseEvent evt){
if (pickedUp){
Point p = evt.getPoint();
if (0 < p.x && p.x < 319 && 0 < p.y && p.y < 319){
System.out.println("down: " + getSquare(p).getPointString());
movePiece(pickedUpPiece, getSquare(p).getColumn(), getSquare(p).getRow());
}
pickedUp = false;
}
else System.out.println("Not picked up");
}
});
}
