Java - sacar la palabra mas larga de una cadena de palabras

mport java.util.*;

public class P5{

    public static void main(String[]args){

        Scanner tec = new Scanner(System.in);

        String palabra;

        int ncarac1;

               do{

                   System.out.println("Dame una palabra");

                   palabra = tec.nextLine();

                   ncarac1 = palabra.length();

               } while ( ncarac1 > 0);

                    System.out.println("la palabra mas larga es " + palabra);

   }

}

import java.util.*;

public class P5{

    public static void main(String[]args){

        Scanner tec = new Scanner(System.in);

        String palabra, palabra2;

        int ncarac1, ncarac2;

        palabra2 = "";

               do{

                   System.out.println("Dame una palabra");

                   palabra = tec.nextLine();

                   ncarac1 = palabra.length();

                            //System.out.println(ncarac1);  

                   ncarac2= palabra2.length();

                         //System.out.println(ncarac2);

                         if(ncarac2<ncarac1){

                             palabra2 = palabra;

                            }

               }    while ( ncarac1 > 0);

                        System.out.println("la palabra mas larga es " + palabra2);

   }

}