Problem 6 (11 points, adapted from Sehilde\'s book page 431): Rewrite the follow

Question

Problem 6 (11 points, adapted from Sehilde's book page 431): Rewrite the following program so that it uses try-with-resources to eliminate the calls to close0. Use only one try block. import javaio. class NoTryWithResources ( public static void main(Stringll args) t FilelnputStream fin-null; FileOutputStream fout- null: // First make sure that both files have specified. if(args.length ! 2) f System.out printla"Usage: NoTryWithResources From Tor return try f fin-new FilelnputStream(args[OD: System.out.printin"IOException: program halted.- fout = new FileOutputStream(args(11); System.out.printin"IOException: program halted."); ifffin !-null && fout!-null) catch (IOException exc) f catch (IOException exc) try f int c fin.readO: fout.write(c); catch (IOException exc) System.out.println"IOException: program halted.") finally f try t if fin!- null) fin.closeO; catch (IOException exc) System.out.printin "IOException: program halted.") try f if(fout!- null) fout.close0: catch (IOException exc) t System.out.printin"1OException: program halted.");

Explanation / Answer

Below is the solution:

code NoTryWithResources.java:

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class NoTryWithResources {
   public static void main(String[] args) {
       FileInputStream fin = null; //create fileinput stream variable with null
       FileOutputStream fout =null; //create fileoutput stream variable with null
      
       if(args.length !=2) { //check if the argument length is not equal to 2
           System.out.println("Usage: NoTryWithResources from to");
           return;
       }
      
       try {
           fin = new FileInputStream(args[0]); //input argument first
           fout = new FileOutputStream(args[1]); //output argument second
          
           if(fin !=null && fout !=null) { //check both are not null
               int c = fin.read(); //read the input file
               fout.write(c); //write the output file
           }
       }
       catch(IOException exc) { //error when file not found
           System.out.println("IOException: program halted.");
       }
       //finall block will always execute and close the file which are input and output
       finally {
           try {
              
               if(fin!=null) {
                   fin.close();
               }
               if(fout!=null) {
                   fout.close();
               }
                  
           }
           catch(IOException exc) {
               System.out.println("IOException: program halted.");
           }
       }
      
   }
}

sample output:

story.txt:

You can search.

story1.txt:

Y

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