I'm trying to read a file which contains:
Dante
Beatrice
3
5
and put them into an array. Then I will assign the values of each member of the array to static variables. when i run the main class of my project, it throws a NullPointerException starting from the line in bold T_T i dunno what to do T_T
can anyone please please help me? i badly need this for my project T_T
try{
BufferedReader loadPlayerPositions = new BufferedReader(new FileReader("/media/KEI-SAMA/CS11/JOKE CS11/KnowGoMilestone5/playerpositions.txt"));
String line = loadPlayerPositions.readLine();
while (line!=null) {
System.out.println("Line read: "+line);
line = loadPlayerPositions.readLine();
}
} catch (Exception e) {
System.out.println("Exception: "+e.getMessage());
}
With that way you read each line.
Do some checking in case the file doesn't have all 4 lines that you want.
You get the exception at that line: info[0] = Players.nameOfPlayer1.toString(); probably because Players.nameOfPlayer1 is null
Last edited by javaAddict; Sep 30th, 2009 at 7:17 am.
javaAddict and ejosiah, thanks for your help!! :]
i've initialized the variables,
i've increased the array size to 4,
now it throws the IOException T_T
Last edited by keicola; Sep 30th, 2009 at 10:08 am.
I tried putting e.printStackTrace() but it didn't accept it saying that "void" cannot be used. When i checked, printStackTrace() was "void" after all. I tried using getMessage() and I got a message saying "Stream closed" when I tried running the program again.
I tried putting e.printStackTrace() but it didn't accept it saying that "void" cannot be used. When i checked, printStackTrace() was "void" after all. I tried using getMessage() and I got a message saying "Stream closed" when I tried running the program again.
I added e.printStackTrace just as you have instructed. After running the program, the IOException points to the line in bold. This were the lines that appeared at the bottom tab:
java.io.IOException: Stream closed
at java.io.BufferedReader.ensureOpen(BufferedReader.java:97)
at java.io.BufferedReader.readLine(BufferedReader.java:292)
at java.io.BufferedReader.readLine(BufferedReader.java:362)
at knowgomilestone4.StateOfGame.loadPositions
(StateOfGame.java:67)
at knowgomilestone4.StoryLine.mainMenu(StoryLine.java:64)
at knowgomilestone4.PlayEngine.main(PlayEngine.java:37)
StateOfGame.loadPositions is the method below Storyline.mainMenu and PlayEngine.main are methods that call on StateOfGame.loadPositions so I think the problem may only be in the StateOfGame.loadPositions method.
for (int l = 0; l < info.length; l++){
info[l] = loadPlayerPositions.readLine();
info[0] = Players.nameOfPlayer1.toString();
info[1] = Players.nameOfPlayer2.toString();
info[2] = Players.loadplayer1currentblock;
info[3] = Players.loadplayer2currentblock;
Players.loadCurrentPositions();
Players.currentPositions();
loadPlayerPositions.close();
}
You are inside the loop, you close the BufferedReader and when the loop runs again you try to read from a closed BufferedReader. When you close the BufferedReader you cannot read from it again. Close it after you are done reading.
Also I believe that you should check if the line read: info[l] = loadPlayerPositions.readLine(); is not null in case the file has less than 4 line
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