The FileReader class creates a Reader that you can use to read the contents of a file. FileReader is meant for reading streams of characters. For reading streams of raw bytes, consider using a FileInputStream.
FileReader Class Example
The following example shows how to read lines from a file and display them on the standard output device. It reads its own source file, which must be in the current directory. This example uses the try-with-resources statement to close the resources automatically.
import java.io.FileReader;
import java.io.IOException;
/**
* The class demonstrate the usage of FileReader class methods.
* @author javaguides.net
*
*/
class FileReaderDemo {
public static void main(String args[]) {
try (FileReader fr = new FileReader("FileReaderDemo.java")) {
int c;
// Read and display the file.
while ((c = fr.read()) != -1)
System.out.print((char) c);
} catch (IOException e) {
System.out.println("I/O Error: " + e);
}
}
}
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