learning java FileInputStream

public class FileInputStreamTest {
    public static void main(String[] args) throws IOException {
        var fis = new FileInputStream("FileInputStreamTest.java");
        var bbuf = new byte[];

        var hasRead = ;
        while ((hasRead = fis.read(bbuf)) > ){
            System.out.println(new String(bbuf,,hasRead));
        }
        fis.close();

    }

}