파일 입출력 - 입력

File fileNm = new File("/Users/yujinyi/Downloads/test.txt");
FileInputStream fis = null;
BufferedReader br = null;
InputStreamReader isr = null;

String temp = "";
String content = "";


try {
    fis = new FileInputStream(fileNm);
    isr = new InputStreamReader(fis);

    br = new BufferedReader(isr);

    while((temp   = br.readLine()) != null){
        content += temp + "\n";
    }

    System.out.println(content);
}catch (Exception e){
    e.printStackTrace();
}