Java - Lower to Upper case Conversion for String

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This program is written in java that can convert a string from lower case to upper case.

 

 

Source Code

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import java.lang.*;

import java.util.*;

import java.io.*;

 

 

class LowerToUpper

{

      public static String ReadString()

      {

           try

           {

                 InputStreamReader input = new InputStreamReader(System.in);

                 BufferedReader reader = new BufferedReader(input);

                 return reader.readLine();

           }

           catch (Exception e)

           {

 

                 e.printStackTrace();

                 return "";

           }

      }

 

 

      public static int ReadInteger()

      {

           try

           {

                 InputStreamReader input = new InputStreamReader(System.in);

                 BufferedReader reader = new BufferedReader(input);

                 return Integer.parseInt(reader.readLine());

           }

           catch (Exception e)

           {

 

                 e.printStackTrace();

                 return 0;

           }

      }

 

      public static String ConvertToUpperCase(String input)

      {

           String output = "";

           for(int i = 0; i < input.length(); i++)

           {

                 if(input.charAt(i) >= 'a' && input.charAt(i) <= 'z')

                 {

                      output += (char) (input.charAt(i) - 'a' + 'A');

                 }

                 else

                      output += input.charAt(i);

           }

           return output;

      }

 

      public static void main(String[] args)

      {

           System.out.print("Enter a string: ");

           String input = ReadString();

           //input = input.toUpperCase();

           input = ConvertToUpperCase(input);

           System.out.print("Converted String in Upper Case: " + input);

      }

}

 

 

Output

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Enter a string: WeLcOmE
Converted String in Upper Case: WELCOME

 

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