Read file
From Programmer's Wiki
Contents |
[edit] C
This article is missing a code example in the C language.
[edit] Java
In Java, you should always have this method inside a try catch block.
try{
BufferedReader in = new BufferedReader(new FileReader("infilename"));
String str;
while ((str = in.readLine()) != null) {
process(str);
}
in.close();
}catch(IOException ex){
System.out.println("Error reading file!");
}
[edit] Groovy
This article is missing a code example in the Groovy language.
[edit] Perl
#!/usr/bin/perl
# open file
open(FILE, "data.txt") or die("Unable to open file");
# read file into an array
@data = <FILE>;
close(FILE);
[edit] PHP
Reading from file:
if ( !($fp = @fopen('myfile.txt', 'r')) ) // r = read mode
echo "Can't open myfile.txt (permission problem?)";
while ($line = fgets($fp, 4096)) { // reads 1 line or 4096 bytes
echo $line . '<br>';
}
fclose($fp); // closes the file
Overwriting a file:
$fp = fopen('myfile.txt', 'w'); // r = write mode
fputs($fp, 'Hello World!'; // writes 'Hello World!'
fclose($fp);
Adding 1 line to a file:
$fp = fopen('myfile.txt', 'a'); // a = append mode
fputs($fp, 'Hello World!'; // appends 'Hello World!'
fclose($fp);
[edit] Python
f = open(filename, 'r') data = f.read() f.close()
[edit] Ruby
This article is missing a code example in the Ruby language.
