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package jed;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;
public class filebuffer {
public ArrayList<String> buffer;
public String fileName;
public boolean hasName;
public filebuffer(String fn, boolean hn) {
buffer = new ArrayList<String>(); // Arraylist that stores every line of a file in strings
hasName = hn;
if (hasName)
fileName = fn;
}
/* printFile: prints strings from file arraylist, if num is true it includes line numbers */
public void printFile(boolean num) {
for (int i = 0; i < buffer.size(); i++) {
if (num)
System.out.printf("%d %s\n", i+1, buffer.get(i));
else
System.out.println(buffer.get(i));
}
}
/* createFile: creates a file, only to be called by writeFile */
private int createFile() {
try {
File f = new File(fileName);
if (f.createNewFile())
return 1;
return 0;
} catch (IOException e) {
return -1;
}
}
/* writeFile: reads strings from file arraylist and prints them into a file */
public int writeFile() {
if (!hasName) {
System.out.println("?");
return 1;
}
int err = createFile();
if (err == -1)
return 1;
try {
FileWriter fw = new FileWriter(fileName);
PrintWriter pw = new PrintWriter(fw);
for (int i = 0; i < buffer.size(); i++)
pw.println(buffer.get(i));
pw.close();
} catch (IOException e) {
return 1;
}
return 0;
}
/* readFile: opens a file and stores each line in a string arraylist called file */
public int readFile() {
try {
File fileObj = new File(fileName);
Scanner fileReader = new Scanner(fileObj);
while(fileReader.hasNextLine())
buffer.add(fileReader.nextLine());
fileReader.close();
} catch (FileNotFoundException e) {
createFile();
}
return 0;
}
}
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