Aplikasi Passing Grade

Assalamu'alaikum Wr. Wb.

Source Code "Button" Proses
    private void ProsesActionPerformed(java.awt.event.ActionEvent evt) {                                      
        // TODO add your handling code here:
      int Nilai_Benar=Integer.parseInt(nilaiBenarField.getText());
      int Nilai_Salah=Integer.parseInt(nilaiSalahField.getText());
      int Nilai_Kosong=Integer.parseInt(nilaiKosongField.getText());
      int Jumlah=Nilai_Benar+Nilai_Salah+Nilai_Kosong;
       
      int PassingGrade=((Nilai_Benar*4)-(Nilai_Salah*1))*100;
      int FinalPassing=(PassingGrade)/(Jumlah*4);
      passingGradeField.setText(""+FinalPassing);

    }

Wassalamu'alaikum Wr. Wb.