Java tutorial
import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; public class Main { public static void main(String[] args) throws IOException { FileInputStream fis = new FileInputStream("C:/test.txt"); InputStreamReader isr = new InputStreamReader(fis); // input stream reader is closed isr.close(); System.out.print("close() invoked"); // read() called after closed method int i = isr.read(); char c = (char) i; System.out.println(c); } }