1
寫入文件時,我得到NullPointerException異常,而試圖寫入文件:的NullPointerException在Robocode的
RobocodeFileWriter fileWriter=new RobocodeFileWriter("test.txt");
for (int i = 0; i < state.countstates; i++)
for (int j = 0; j < state.countactions; j++)
fileWriter.write((int) table[i][j]);
}
例外:
java.lang.NullPointerException
at net.sf.robocode.host.security.ThreadManager.createRobotFileStream(ThreadManager.java:136)
at robocode.RobocodeFileOutputStream.<init>(RobocodeFileOutputStream.java:88)
at robocode.RobocodeFileOutputStream.<init>(RobocodeFileOutputStream.java:69)
at robocode.RobocodeFileWriter.<init>(RobocodeFileWriter.java:69)
at QTable.saveData(QTable.java:79)
at MyFirstRobot.saveToFile(MyFirstRobot.java:471)
at MyFirstRobot.onDeath(MyFirstRobot.java:414)
at robocode.DeathEvent.dispatch(DeathEvent.java:63)
at robocode.Event$HiddenEventHelper.dispatch(Event.java:259)
at net.sf.robocode.security.HiddenAccess.dispatch(HiddenAccess.java:191)
at net.sf.robocode.host.events.EventManager.dispatch(EventManager.java:422)
at net.sf.robocode.host.events.EventManager.processEvents(EventManager.java:376)
at net.sf.robocode.host.proxies.BasicRobotProxy.executeImpl(BasicRobotProxy.java:412)
at net.sf.robocode.host.proxies.BasicRobotProxy.execute(BasicRobotProxy.java:121)
at robocode.AdvancedRobot.execute(AdvancedRobot.java:549)
at MyFirstRobot.run(MyFirstRobot.java:68)
at net.sf.robocode.host.proxies.HostingRobotProxy.callUserCode(HostingRobotProxy.java:274)
at net.sf.robocode.host.proxies.HostingRobotProxy.run(HostingRobotProxy.java:221)
at java.lang.Thread.run(Thread.java:695)
此異常,即使我通過禁用安全管理器發生傳遞-DNOSECURITY = true 我的robocode版本是1.8.3.0,並在Mac上進行開發。任何幫助表示讚賞。
什麼是414行? –
414:調用saveToFile 471:RobocodeFileWriter fileWriter = new RobocodeFileWriter(「test.txt」); 這是saveToFile方法的第一行 – Pooya
是創建的文件嗎?也許這是一個權限問題 –