我有一个applet需要从带有.java文件的eclipse包中的本地文本文件加载已保存的数据。要在此问题中使用,其名称为“saveData.txt”。
当我通过eclipse运行applet时,一切都运行良好。但是,一旦我把它(确保包含txt文件和.classpath文件)并将其放到网站上,就会无法加载。我在InputStreamReader上收到Unknown source错误。我已将我的代码包含在下面加载和保存。创建InputStreamReader Line时会出现错误。
我搞砸了什么想法?
private ArrayList loadLocations() throws IOException{
ArrayList locations = new ArrayList();
InputStream is = getClass().getResourceAsStream("\saveData.txt");
;; BELOW LINE is where exception is thrown
InputStreamReader isr = new InputStreamReader(is);
mInputStream = new BufferedReader(isr);
String line = mInputStream.readLine();
while (line != null && !(line.equals(""))) {
locations.add(new Location(line));
line = mInputStream.readLine();
}
if (mInputStream != null)
mInputStream.close();
Collections.sort(locations);
return locations;
}
private void saveLocations() throws IOException {
try {
mOutputStream = new PrintWriter(new File(getClass().getResource("\\saveData.txt").toURI()));
}
catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
;
for (Location l : locations) {
mOutputStream.print(l.getRawListing()+ "\n");
}
if (mOutputStream != null)
mOutputStream.close();
}
完整错误详细信息(在浏览器中运行时)
Java Plug-in 1.6.0_24 Using JRE version 1.6.0_24-b07 Java HotSpot(TM) Client VM User home directory = C:\Users\Ross ---------------------------------------------------- c: clear console window f: finalize objects on finalization queue g: garbage collect h: display this help message l: dump classloader list m: print memory usage o: trigger logging q: hide console r: reload policy configuration s: dump system and deployment properties t: dump thread list v: dump thread stack x: clear classloader cache 0-5: set trace level to ---------------------------------------------------- java.lang.reflect.InvocationTargetException at com.sun.deploy.util.DeployAWTUtil.invokeAndWait(Unknown Source) at sun.plugin2.applet.Plugin2Manager.runOnEDT(Unknown Source) at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at java.io.Reader.(Unknown Source) at java.io.InputStreamReader.(Unknown Source) at listings.listings.loadLocations(listings.java:624) at listings.listings.setup(listings.java:667) at listings.listings.(listings.java:59) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at java.lang.Class.newInstance0(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at sun.plugin2.applet.Plugin2Manager$12.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$000(Unknown Source) at java.awt.EventQueue$1.run(Unknown Source) at java.awt.EventQueue$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Exception: java.lang.reflect.InvocationTargetException