Problemas empezando con java::Ahorcado

[naitmeir]

Estoy empezando con java y tengo pequeños problemas para hacer un ahorcado... El String "introducida" deberia ir cogiendo los caracteres que se introducen... pero solo reemplaza el primero para cada vez...

Código PHP:

  public static void main(String[] args) throws IOException{ 
        String palabra="hola"; 
        String introducida="____"; 
        int intentos=6,i=0; 
         
        BufferedReader entrada= new BufferedReader(new InputStreamReader(System.in)); 
        System.out.println("Adivina la palabra: "); 
         
        try{ 
            do{ 
                System.out.println(introducida+" Intentos restantes("+intentos+"). - Introduce una letra: ");                 
                String cadena=entrada.readLine(); 
                char c2=cadena.charAt(0); 
 
                for(i=0;i<palabra.length();i++){             
                    char c1=palabra.charAt(i); 
                    char c3=introducida.charAt(i); 
                    if(c1==c2){ 
                      System.out.print(c1); //imprimir iguales. 
                      introducida.replace(c3, c2); 
                    }  
 
                }  
                intentos--; 
            }while(intentos>0); 
 
            if(palabra.equals(introducida)){ 
               System.out.println("Has acertado la palabra era "+palabra); 
            } 
            else{ 
                System.out.println("Has perdido!"); 
            } 
        }catch(Exception e){ 
            System.out.println("Has de introducir un caracter"); 
        } 
             
         
    }  
   

Gracias de antemano!

[PachuG]

Creo que el problema es el metodo replace.

Segun la api

replace
public String replace(char oldChar,
char newChar)Returns a new string resulting from replacing all occurrences of oldChar in this string with newChar.
If the character oldChar does not occur in the character sequence represented by this String object, then a reference to this String object is returned. Otherwise, a new String object is created that represents a character sequence identical to the character sequence represented by this String object, except that every occurrence of oldChar is replaced by an occurrence of newChar.

Examples:

"mesquite in your cellar".replace('e', 'o')
returns "mosquito in your collar"
"the war of baronets".replace('r', 'y')
returns "the way of bayonets"
"sparring with a purple porpoise".replace('p', 't')
returns "starring with a turtle tortoise"
"JonL".replace('q', 'x') returns "JonL" (no change)

Parameters:
oldChar - the old character.
newChar - the new character.
Returns:
a string derived from this string by replacing every occurrence of oldChar with newChar.

Saludos