FileReader

FileReader is subclass of InputStreamReader
read() returns char value or -1 if eof occur.

public class Outer {
    public static void main(String[] args) {
        FileReader r = null;
        try {
            r = new FileReader("C:\\dirtest\\testmakefile.txt");
            while(true) {
                int i = r.read();
                if(i!=-1) {
                    System.out.print( Character.toChars(i));
                } else {
                    break;
                }
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            try {
                if(r!=null) r.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
}

hello
bye

try with resourceを使うとclose()を書かなくてもblockが終了時に
自動でclose()してくれる

public class Outer {
    public static void main(String[] args) {
        try {
            FileReader r = new FileReader("C:\\dirtest\\testmakefile.txt");
            try (r){
                while(true) {
                    int i = r.read();
                    if(i!=-1) {
                        System.out.print( Character.toChars(i));
                    } else {
                        break;
                    }
                }
            }
        } catch (IOException ex ) {
            ex.printStackTrace();
        }
    }
}