[In java, make file to Inputstream] For ps, make Filestream as Inputstream #Inputstream #Filestream

readFile.java

class FileReader {
  public static void main(String[] argc) {
    InputStream inputStream = FileReader.class.getClass().getResourceAsStream("/RootFromResourceFile/b1018.txt");
    // inputStream = System.in 
    Scanner scanner = new Scanner(inputStream);
  }
}