package stream; import java.io.*; public class FileReaderTest { public static void main(String[] args) { File f = new File("src/stream","hello.txt");
// 把流定义在try()里,try,catch或者finally结束的时候,会自动关闭
try(FileReader fr = new FileReader(f)){ char[] c = new char[(int)f.length()]; fr.read(c); System.out.println(c); }catch(IOException e){ e.printStackTrace(); } } }