Arrays in JAVA

Question

I want to make a school report in JAVA, a matrix with 4 lines that will be the number of students,and 4 columns that will be the 4 grades of each student I used a vector to pick up the average at the end, my only problem is that I wish that first all students put their grades to only at the end print on the average screen of each one. I don’t know what the problem with my code is,".

public static void main(String[] args) {

    final int TOTAL_ALUNOS = 4;
    final int TOTAL_BIMESTRES = 4;
    final double NOTA_MINIMA = 70.0;

    Scanner input = new Scanner(System.in);
    String[] nomeAlunos = new String[TOTAL_ALUNOS];
    double[][] notaAlunos = new double[TOTAL_ALUNOS][TOTAL_BIMESTRES];
    double[] mediaAlunos = new double[TOTAL_ALUNOS];

    //Obter nome dos alunos
    for (int i = 0; i < TOTAL_ALUNOS; ++i) {
        System.out.println("Informe o nome do " + (i + 1) + "° aluno:");
        nomeAlunos[i] = input.nextLine();

        System.out.println("");

        //Obter notas dos alunos todos os bimetres
        for (int y = 0; y < TOTAL_ALUNOS; ++y) {
            for (int j = 0; j < TOTAL_BIMESTRES; ++j) {
                System.out.println("Informe a nota do aluno " + nomeAlunos[y]
                        + " para o " + (j + 1) + "° bimestre");
                notaAlunos[y][j] = input.nextDouble();
            }
        }
    }

    //calcular media alunos
    for (int i = 0; i < TOTAL_ALUNOS; ++i) {
        for (int j = 0; j < TOTAL_BIMESTRES; ++j) {
            mediaAlunos[i] += notaAlunos[i][j];
        }
        mediaAlunos[i] /= TOTAL_BIMESTRES;
    }

    //Mostrar situacao dos alunos
    System.out.println("======== RESULTADO FINAL =======");

    for (int i = 0; i < TOTAL_ALUNOS; ++i) {

        if (mediaAlunos[i] >= NOTA_MINIMA) {
            System.out.println("Nome: " + nomeAlunos[i] + " Media: " + mediaAlunos[i]
                    + " Situação: Aprovado");
            continue;
        }

        System.out.println("Nome: " + nomeAlunos[i] + " Media: " + mediaAlunos[i]
                + " Situação: Reprovado");
    }

}

}

Answer 1

In consecutive reading of numeric values and String must empty the keyboard buffer before reading the String value, for example:

int n;
String s;

System.out.printf("Informe um Número Inteiro: ");
n = ler.nextInt();

ler.nextLine(); // esvazia o buffer do teclado

System.out.printf("Informe uma cadeia de caracteres:\n");
s = ler.nextLine();