i need to make this program write to a file, turning all letters to upper case.

ID: 3830902 • Letter: I

Question

i need to make this program write to a file, turning all letters to upper case. I m able to read in the file and read out but at the moment there is nothhing showing up on the file im writing to. i also dont know how to write the code to make all upper letters. There needs to be a try with resource that is why i have the resources insside the try block.

public class ConvertToUpperCase {

   public static void main(String[] args) {
       try {
           BufferedReader in =
                   new BufferedReader(new FileReader(new File("src/finalPrep/fileIo/Quote.txt")));
           System.out.println("File open successful!");

           //some code to make the file all upper letters

           PrintWriter writer =
                       new PrintWriter(new File("src/finalPrep/fileIo/upper.txt"));

           System.out.println("file was written on");
           writer.println(in);
       } catch (FileNotFoundException e) {

           e.printStackTrace();
       }
   }
}

Explanation / Answer

I have modified the code and highlighted the code changes below.

ConvertToUpperCase.java

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

public class ConvertToUpperCase {
public static void main(String[] args) throws IOException {
try {
BufferedReader in =
new BufferedReader(new FileReader(new File("src/finalPrep/fileIo/Quote.txt")));
System.out.println("File open successful!");

//some code to make the file all upper letters
String s ="";
String line ="";

while((line=in.readLine()) !=null)
{
s = s + line.toUpperCase()+" ";
}
PrintWriter writer =
new PrintWriter(new File("src/finalPrep/fileIo/upper.txt"));

System.out.println("file was written on");
writer.println(s);
writer.flush();
writer.close();
in.close();
} catch (FileNotFoundException e) {

e.printStackTrace();
}
}
}

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i need to make this program write to a file, turning all letters to upper case.

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