Re: java multidimensional string array

From:
Mark Thomas <anon>
Newsgroups:
comp.lang.java.programmer
Date:
Fri, 05 May 2006 18:22:10 +0100
Message-ID:
<445b89c2$0$5925$ed2e19e4@ptn-nntp-reader04.plus.net>
geletine wrote:

Now i am taking a new step and sending this array to a simpe text file,
i am just missing out on something i am sure , but here is the code in
two diffrent styles..

import java.io.*;
public class filearray {
public static void main(String args [])throws IOException {
PrintWriter outfile;
String filename;
filename="/home/allix/javafiles/filearray.txt";
String [] [] strings = { { "player1",
                         "player2",
                         "player3",
                         "player4",
                         "player5",
                         "player6" },
                         {"name1",
                          "name2",
                          "name3",
                          "name4",
                          "name5",
                          "name6" }
                        };
        for (int i=0; i<strings[0].length; i++)
       outfile = new PrintWriter (new FileWriter (filename),true );
       outfile.println(strings[0][i] + " " + strings[1][i]);
       outfile.close();
// System.out.println(strings[0][i] + " " + strings[1][i]);
}
}

The output error is

javac filearray.java
filearray.java:22: cannot find symbol
symbol : variable i
location: class filearray
       outfile.println(strings[0][i] + " " + strings[1][i]);
                                  ^
filearray.java:22: cannot find symbol
symbol : variable i
location: class filearray
       outfile.println(strings[0][i] + " " + strings[1][i]);
                                                         ^
2 errors
allix@allix:~/javafiles$

the seconds design is like this

import java.io.*;
public class filearray2 {
public static void main(String args [])throws IOException {
PrintWriter outfile;
String filename;
filename="/home/allix/javafiles/filearray2.txt";
String [] [] strings = { { "player1", "name1"},
                          { "player2", "name2"},
                          {"player3", "name3"},
                          {"player4", "name4"},
                          {"player5" , "name5"},
                          { "player6", "name6"},
                         };
        for (int i=0; i<strings.length; i++)
        outfile = new PrintWriter (new FileWriter (filename),true );
        outfile.println(strings[i][0]+ " " + strings[i][1]);
        outfile.close();
 // System.out.println(strings[i][0]+ " " + strings[i][1]);
}
}

filearray2.java:16: cannot find symbol
symbol : variable i
location: class filearray2
        outfile.println(strings[i][0]+ " " + strings[i][1]);
                                ^
filearray2.java:16: cannot find symbol
symbol : variable i
location: class filearray2
        outfile.println(strings[i][0]+ " " + strings[i][1]);
                                                      ^
2 errors
allix@allix:~/javafiles

which is the same error

i am not sure why its not seeing the variable i....

thanks again for everyones help


You need { } around all the statements that you want to include in your
for loop, otherwise it's just the first statement, and i is used in the
second.

Mark

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