Error: error: class, interface, or Enum expected

Question

Why is my code making the mistake:

error: class, interface, or Enum expected

Follows the code:

import java.util.Scanner;

    public class teste175 {

        public static void main (String[] args) {

            Scanner sc = new Scanner (System.in);

            int a, i;
            a = sc.nextInt();

            int v[] = new int [a];

            for (i=0; i<a; i++) {
                v[i] = sc.nextInt();
            }
            funcao (v, a);
        }
    }

    static int funcao (int v[], int a){

        int temp, j, i;

        for (j=0; j<a; j++){
            for (i=1; i<a; i++){

                if (v[i]<v[i-1] {
                    temp = v[i];
                    v[i] = v[i-1];
                    v[i-1] = temp;
                }
            }
        }
        return v;
    }
}

Answer 1

One of the main reasons you’re always struggling to understand what’s going on in the code is their lack of organization. Looking at this code really is very difficult to find an error there, even for very experienced programmers. Organizing it makes it very easy to find all errors present in the code, not only reported. This goes for all your code, in Java, C++ or other language.

The function is outside the class, parentheses are missing, there is wrong return, just to mention some problems. So it is much simpler and easier to read:

import java.util.Scanner;

class HelloWorld {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int[] v = new int[a];
        for (int i = 0; i < a; i++) v[i] = sc.nextInt();
        funcao(v);
        for (int i = 0; i < a; i++) System.out.println(v[i]);
    }

    static void funcao(int[] v) {
        for (int j = 1; j < v.length; j++) {
            for (int i = 1; i < v.length; i++) {
                if (v[i] < v[i - 1]) {
                    int temp = v[i];
                    v[i] = v[i - 1];
                    v[i - 1] = temp;
                }
            }
        }
    }
}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.

Nor will I get into the merit of the algorithm being good or bad, I do not know the goal.