UpperCase problem

[logieen]

Hello everyone .....

I am new in java i start learn it from 3 weeks ago so i don't know much abut java .
i want to write a program that ask the user to enter his/her name and the program will print the first name as it is and the last name will be in UpperCase .

the code it print this error " <identifier> expected "in this line prevCh='.';

import javax.swing.*;
public class PrintUser
  {

    public static void main(String[]args)
    {
        String names=JOptionPane.showInputDialog(null,"Enter your Name :");
        System.out.println(names);
        UserName r=new UserName();
      JOptionPane.showMessageDialog(null,names);
     System.out.println();
    }
    
}

class UserName
{

   char ch;
   char prevCh;
   	String names;  
          int i;        
       prevCh='.';
          void r(String[]args);
  {
  
          for (i=0;i<names.length();i++ ) 
          	{
             ch = names.charAt(i);
             if ( Character.isLetter(ch)  &&  ! Character.isLetter(prevCh) )
                System.out.print( Character.toUpperCase(ch) );
             else
                System.out.print(ch);
             prevCh = ch;  
           }
         
       }
        
        
}

[peter_budo]

Once you create character variable you have to initialize in same time so your code

char prevCh;
prevCh='.';

should be

char prevCh='.';