PrintWriter isn't writing to a file, but the split() seems to be working correctly?

Question

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.Arrays;
import java.util.LinkedList;

public class ProjectTwoAccessControl{


 // public static void fOrAAdd(String x,PrintWriter n){
//      n.write(x);
//  }


public static void main(String [] args) throws IOException{
    PrintWriter friends = new PrintWriter("friends.txt"); 
    PrintWriter audit = new PrintWriter("auditlog.txt");



try {
FileInputStream inputCommands;

    inputCommands = new FileInputStream("test.txt");
    BufferedReader br = new BufferedReader(new InputStreamReader(inputCommands));
    String line;
    while ((line = br.readLine()) != null){ //2
        String[] command = line.split(" ");
        System.out.println(Arrays.toString(command));
//      for(int i = 0; i < command.length;i++){ //1
        if (command[0] == "friendadd"){
            friends.write(command[1]);
            audit.write("Friend " + command[1] + " was added.");

        }
//      } //1

} //2
}//try end
catch (FileNotFoundException e) {
    System.out.println("No file found by this name");
}
    friends.close();
    audit.close();

} 








}

I am attempting to make a social media style of access control for a school assignment, and am going to continue working on this all evening, but I cannot figure out why the PrintWriters are not writing. I added in to print the array "command" out, and it seems to be working correctly, but nothing will print to my friends.txt or audit.txt.

Maybe try flushing the printwriter after every line to make sure any pending changes are written. — Zachary Craig, Nov 29 '16 at 17:47

score -3 · Answer 1 · answered Nov 29 '16 at 18:41

-3

zack is right you need to call flush() on the PrintWriter because close() does not call flush()

answered Nov 29 '16 at 18:41

Simon Martinelli

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And why do you think that there is something in the buffer which needs to be flushed? – Tom Nov 29 '16 at 18:56

PrintWriter isn't writing to a file, but the split() seems to be working correctly?

1 Answers1