Getting a null value when reading a text file in java using a buffered reader

Question

I had a problem reading a text file in java and assigning it to an array. The program works, but I get null. I tried to change the code to the simplest one, as you see below. Because this one should really scroll the text file. But I do it so that I can easily see where the problem is. But the problem is that I don’t know why it outputs null anyway.

The file is, of course, located in the directory I specified, since the built-in method exists true when I check it with this:

if(ofile.exists()==true){
System.out.println("exist");
}else{
System.out.println("not exist");
}

please, I need help defining the error behind this, why it returns null.

public static void main(String args[]){

    String[] eq=new String[50];
    String[]ea=new String[50];
    String[]eb=new String[50];
    String[] ec=new String[50];
    String[]ed=new String[50];
    char[] ans=new char[50];
    String strtemp;
    File ofile= new File("J:\\questions.txt");
    BufferedInputStream bis= null;
    FileInputStream fis= null;
    DataInputStream dis=null;




    int ii=0;
    int score=0;



    System.out.println(eq[1] + "\n" + ea[1] + "\n" + eb[1] + "\n" + ec[1] + "\n" + ed[1] + "\n" + "\n" + "Answer: ");
    String strans=x.nextLine();
    char y=strans.charAt(0);
    if(y==ans[1]){
    score++;
    }else{

    }


    try{
    fis=new FileInputStream(ofile);
    bis=new BufferedInputStream(fis);
    dis=new DataInputStream(bis);

    while(dis.available()!=0){

    eq[1]=dis.readLine(); ea[1]=dis.readLine(); 
    eb[1]=dis.readLine(); ec[1]=dis.readLine();
    ed[1]=dis.readLine(); strtemp=dis.readLine();
    ans[1]=strtemp.charAt(0); 

    }

    bis.close();
    dis.close();
    fis.close();


    }catch(FileNotFoundException e){
    e.printStackTrace();
    }catch(IOException e){
    e.printStackTrace();

    }


    }

Answer 1

Java BufferedReader:

    BufferedReader reader = null;
    try {
        reader = new BufferedReader( new FileReader( "J:\\questions.txt") );
        String line = null;
        do {
            line = reader.readLine();
            if( line != null ) {
                // Do Something with line                
            }
        } while( line != null );
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if( reader != null )
            try {
                reader.close();
            } catch (IOException e) {
            }
    }

>

Answer 2

, . , dis.available 0, . - .

Answer 3

`available ' javadoc

int ()             , ( ) .

0, . available .