Question

program to replace lower case character to upper case and vice versa in a given sentence.

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Code

				
					
import java.util.Scanner;
public class replaceLowerCaseToUpperCaseAndViceVersaInSentence 
{  
    public static void main(String[] args)
    {  
        String sen="",wd="";
        char ch=' ';
        int i=0,len=0;
        Scanner sc = new Scanner(System.in);    
        
        System.out.println("Enter a sentence");   
        sen = sc.nextLine(); 
        sen=sen+" ";
        
        len=sen.length();
        for(i=0;i< len;i++)
        {
            ch=sen.charAt(i);
            if(ch==' ')
            {
                System.out.print(wd+"   ");
                wd="";
            }
            else
            {
                if(Character.isLowerCase(ch)==true)
                {
                    wd=wd+Character.toUpperCase(ch);
                }
                else
                {
                    wd=wd+Character.toLowerCase(ch);
                }
                
            }
        }
        
    }  
}