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PONullPointerException when writing to a file in Robocode
 

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  1. PONullPointerException when writing to a file in Robocode
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    <p>I get NullPointerException while trying to write to a file:</p> <pre><code> RobocodeFileWriter fileWriter=new RobocodeFileWriter("test.txt"); for (int i = 0; i &lt; state.countstates; i++) for (int j = 0; j &lt; state.countactions; j++) fileWriter.write((int) table[i][j]); } </code></pre> <p>The exception:</p> <pre><code>java.lang.NullPointerException at net.sf.robocode.host.security.ThreadManager.createRobotFileStream(ThreadManager.java:136) at robocode.RobocodeFileOutputStream.&lt;init&gt;(RobocodeFileOutputStream.java:88) at robocode.RobocodeFileOutputStream.&lt;init&gt;(RobocodeFileOutputStream.java:69) at robocode.RobocodeFileWriter.&lt;init&gt;(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) </code></pre> <p>This exception occurs even if I disable the security manager by passing -DNOSECURITY=true My robocode version is 1.8.3.0 and doing the development on Mac. Any help is appreciated. </p>
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    1. This table or related slice is empty.
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    1. USTshepang
    1. USPooya
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. PTAnswer
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      1. PONullPointerException when writing to a file in Robocode
      1. This table or related slice is empty.
      1. VTUpMod
    1. COwhat is line 414?
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      1. PONullPointerException when writing to a file in Robocode
      1. USPhilipp Sander
    2. CO414: is a call to saveToFile 471: RobocodeFileWriter fileWriter=new RobocodeFileWriter("test.txt"); which is the first line in saveToFile method
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      1. PONullPointerException when writing to a file in Robocode
      1. USPooya
    3. COis the file created? maybe it's a permission problem
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      1. PONullPointerException when writing to a file in Robocode
      1. USPhilipp Sander
 

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