NullPointerException for statement - nullpointerexception

Question

public void loadFileRecursiv(String pathDir)
{
File fisier = new File(pathDir);
File[] listaFisiere = fisier.listFiles();
for(int i = 0; i < listaFisiere.length; i++)
{
if(listaFisiere[i].isDirectory())
{
loadFileRecursiv(pathDir + File.separatorChar + listaFisiere[i].getName());
}
else
{
String cuExtensie = listaFisiere[i].getName();
String nume = cuExtensie.split(".")[0];
String acronimBanca = nume.split("_")[0];
String tipAct = nume.split("_")[1];
String dataActString = nume.split("_")[2];
//Date dataAct = new SimpleDateFormat("dd-MM-yyyy").parse(dataActString);
//String denBanca = inlocuireAcronim(acronimBanca);
insertData(listaFisiere[i], cuExtensie, acronimBanca, tipAct, dataActString);
//fisiere[i].renameTo(new File("u02/ActeConstitutive/Mutate"));
}
}
}
I have a simple code that checks all files and folders recursevely when a path is given. Unfortunately, i have a NULLPOINTEREXCEPTION for for(int i = 0; i < listaFisiere.length; i++) this line. What can be the problem? Thank you!

Answer 1

check whether listaFisiere is null or not
If not null, change this line as for(int i = 0; i < listaFisiere.length(); i++)
and
you can change your code as below
for(File path:listaFisiere)
{
if(path.isDirectory())
{
loadFileRecursiv(pathDir + File.separatorChar + path.getName());
}
else
{
String cuExtensie = path.getName();
String nume = cuExtensie.split(".")[0];
String acronimBanca = nume.split("_")[0];
String tipAct = nume.split("_")[1];
String dataActString = nume.split("_")[2];
//Date dataAct = new SimpleDateFormat("dd-MM-yyyy").parse(dataActString);
//String denBanca = inlocuireAcronim(acronimBanca);
insertData(path, cuExtensie, acronimBanca, tipAct, dataActString);
//fisiere[i].renameTo(new File("u02/ActeConstitutive/Mutate"));
}
}