The given program is being written using normal try and catch blocks and we need finally block to close the opened resources, you need to Re-write the following code by using try-with- resources. FileInputStream in = null; FileOutputStream out = null; try{ in = new FileInputStream("file.txt"); out = new FileOutputStream("out.txt"); // Rest of the Code } catch (FileNotFoundException fnf) { } finally{\ try{ in.close(); if (out != null) out.close(); if(in != null) } catch (IOException ioe) { ... }