I've done everything but i just don't know why it is not even accepting it...this is my code i think that it doesnt have nothing to do with it but ill send it anyways. Any help is appreciated!

public class Exercicio2 {
    public static String mcaracteres(String[] array) {
        int maxLength = 0;
        String maiscaracteres = null;
        for (String s : array) {
            if (s.length() > maxLength) {
                maxLength = s.length();
                maiscaracteres = s;
            }
        }
        return maiscaracteres;
    }
    public static void main(String[] args) {
        Scanner scn = new Scanner(System.in);
        String[] array = new String[10];
        System.out.println("Insira 10 linhas");
        for (int i = 0; i < array.length; i  ) {
            array[i] = scn.nextLine();
            if (array[i].equals("")) break;
        }
        int choice = 0;
        while (choice != 6)   {
            System.out.println(".......................MENU........................");
            System.out.print("Opcao: ");
            choice = scn.nextInt();
            System.out.println();
            if (choice > 6 || choice < 0) {
                System.out.println("Escolha invalida.Tente uma opcao entre 1 e 6");
            }
            if (choice == 1) {
;                   String maiscaracteres = mcaracteres(array);
                      System.out.format("Linha com mais caracteres: '%s'\n", maiscaracteres);
            }
            else if (choice == 4) {
                System.out.println("Insira a linha que deseja verificar");
                Scanner sc = new Scanner(System.in);
                String verify = sc.next();
                if (array.contains(verify))
                    System.out.println(verify   " já existe.");
                else {
                    System.out.println("A linha ainda nao existe");
                }
            }
        }
    }
}

I'm sorry if this is a dumb question but i'm new to java and i'm trying to figure it out little by little

CodePudding user response：

Your example code has two main flaws and will not compile:

1. it does not import java.util.Scanner; on top
2. array is - as the name correctly says - an array. Arrays don't have the method contains, maybe you wanted to use an java.util.ArrayList instead?

But for the second flaw there is also a "cheap" solution, you can convert the array to a list just for the call of the contains. No good performance, don't do this for real software, but for your example it could work: if (Arrays.asList(array).contains(verify))

You have to add another import to use Arrays: import java.util.Arrays;

CodePudding user response：

I believe the problem is not an import. You are calling contains() on an array and not on a list. Please replace

array.contains(verify) 

with

Arrays.asList(array).contains(verify)

and you should be ok