Question

Create a New Java Project called YourLastNameUpperCase.

Write a program that asks the user for the names of two files. The first file should be opened for reading and the second file should be opened for writing. The program should read the contents of the first file, change all characters to uppercase, and store the results in the second file. The second file will be a copy of the first file, except that all the characters will be uppercase. Use the Notepad text editor to create a simple file that can be used to test the program.

Answer 1

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Names{

public static void main(String[] args) throws Exception{
Names n=new Names();
n.readInputFile();

}

   public void readInputFile(){
   String line=null;
   String path="the path where you stored the file"//home/names.txt
   File file=new File(path);
   FileInputStream fis=new FileInputStream(file);
   BufferReader br = new BufferReader(fis);
   while((line=br.readLine())!=null){
       convertLastName(line);
   }
   }
  
   public void convertLastName(String name){
   Array arr=name.split(",");
   if(arr.length()==2){
       writeIntoFile(arr);
       }
   }
  
   public void writeIntoFile(Array arr){
       String firstName="";
       String lastName="";
       String fullName="";
       FileWriter fw = new FileWriter("C:\\Temp\\TestFile.Txt");
BufferedWriter WriteFileBuffer = new BufferedWriter(fw);
           firstName=String.value(arr[0]);
           lastName=String.value(arr[1]).toUpperCase();
           fullName=firstName.concat(lastName);
WriteFileBuffer.write(fullName);
           WriteFileBuffer.newLine();
WriteFileBuffer.close();
   }
}