EN
Java read text from file (simple way)
3 points
xxxxxxxxxx1
import java.io.IOException;2
import java.nio.charset.StandardCharsets;3
import java.nio.file.Files;4
import java.nio.file.Path;5
import java.nio.file.Paths;6
import java.util.List;7
8
public class ReadTextExample {9
10
public static void main(String[] args) throws IOException {11
12
Path path = Paths.get("C:\\projects\\text_file.txt");13
14
List<String> lines = Files.readAllLines(path, StandardCharsets.UTF_8);15
16
for (String line : lines) {17
System.out.println(line);18
}19
}20
}Output:
xxxxxxxxxx1
line 12
line 23
line 3We can also read entire text file in just 1 line of code in java:
new String(Files.readAllBytes(path))
xxxxxxxxxx1
import java.io.IOException;2
import java.nio.file.Files;3
import java.nio.file.Path;4
import java.nio.file.Paths;5
6
public class ReadTextExample {7
8
public static void main(String[] args) throws IOException {9
10
Path path = Paths.get("C:\\projects\\text_file.txt");11
12
String entireTextFile = new String(Files.readAllBytes(path));13
14
System.out.println(entireTextFile);15
}16
}Output:
xxxxxxxxxx1
line 12
line 23
line 3xxxxxxxxxx1
import java.io.*;2
import java.nio.charset.StandardCharsets;3
import java.nio.file.Path;4
import java.nio.file.Paths;5
6
public class FileUtils {7
8
public static String readText(Path path) throws IOException {9
File file = path.toFile();10
11
StringBuilder builder = new StringBuilder();12
char[] buffer = new char[1024];13
14
try (InputStream stream = new FileInputStream(file);15
Reader reader = new InputStreamReader(stream, StandardCharsets.UTF_8)16
) {17
while (true) {18
int count = reader.read(buffer, 0, buffer.length);19
20
if (count == -1)21
break;22
23
builder.append(buffer, 0, count);24
}25
}26
27
return builder.toString();28
}29
30
// usage example:31
public static void main(String[] args) throws IOException {32
33
String text = FileUtils.readText(Paths.get("C:\\projects\\text_file.txt"));34
35
System.out.println(text);36
}37
}Output:
xxxxxxxxxx1
line 12
line 23
line 3Input data preparation for examples in this article.
File path under Windows operating system:
xxxxxxxxxx1
C:\\projects\\text_file.txtFile content:
xxxxxxxxxx1
line 12
line 23
line 3