Read a file character by character/UTF8: Difference between revisions
Read a file character by character/UTF8 (view source)
Revision as of 10:31, 2 February 2024
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=={{header|Java}}==
The ''FileReader'' class offers a ''read'' method which will return the integer value of each character, upon each call.<br />
When the end of the stream is reached, -1 is returned.<br />
You can implement this task by enclosing a ''FileReader'' within a class, and generating a new character via a method return.
<syntaxhighlight lang="java">
import java.io.FileReader;
Line 376 ⟶ 378:
import java.nio.charset.StandardCharsets;
public class
private final FileReader reader;
public
▲ try ( FileReader reader = new FileReader("input.txt", StandardCharsets.UTF_8) ) {
/** @return integer value from 0 to 0xffff, or -1 for EOS */
public int nextCharacter() throws IOException {
int ch = reader.read();▼
}▼
public void close() throws IOException {
System.out.println(Character.toChars(ch));▼
}▼
}▼
}
}
</syntaxhighlight>
===Using Java 11===
<syntaxhighlight lang="java">
import java.io.BufferedReader;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
public final class ReadFileByCharacter {
public static void main(String[] aArgs) {
Path path = Path.of("input.txt");
try ( BufferedReader reader = Files.newBufferedReader(path, StandardCharsets.UTF_8) ) {
int value;
while ( ( value = reader.read() ) != END_OF_STREAM ) {
} catch (IOException ioe) {
ioe.printStackTrace();
}
private static final int END_OF_STREAM = -1;
}
</syntaxhighlight>
{{ out }}
<pre>
R
o
s
e
t
t
a
</pre>
=={{header|jq}}==
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=={{header|Wren}}==
<syntaxhighlight lang="
File.open("input.txt") { |file|
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