Unexcepted Types... why?

[Olivier Legat]

class Students extends SchoolDatabase
{
File s_file = new File("Init.txt");
RandomAccessFile s_raf;

static void Add()throws IOException
{
System.out.print("\nEnter the name of the student. Key will automatically be generated.\n");
System.out.print(">");
String add_name = Students.NameCheck();
 

for (int i=1000; i<10000; i++)
{
String temp_filename = i + ".txt";
File temp_file = new File(temp_filename);

if(temp_file.exists() = false){
new File(temp_filename).createNewFile();}
}
}

public static String NameCheck()throws IOException
    {
    String str=br.readLine();
    
    if(str.length() > 30){
    System.out.println("Validation: Name is too long. Enter new value.");
    str = Students.NameCheck();}
    
    else{
    System.out.println("Validation: correct");}
    
    return str;
    }
}

Simple prgm. To run it you need an external .txt file called "Init.txt".

What this prgm is meant to do is create separate .txt file for each student. The .txt files should be named according to the ID (which MUST have 4 numbers and range from 1000-9999). When adding, it first needs to search for an available slot starting from 1000.

The problem occurs here: if(temp_file.exists() = false)
I've tested the .exists() method and I know it returns true or false, yet the complier tells me:

unexpected type

why?...

[Vijay Raj]

You need to check for true or false right, and not assign the value false. So, maybe == will help, rather than just =

  
if(temp_file.exists() == false)
  

Vijay.

[Olivier Legat]

Oh right... how dum of me

Thanks loads... fixed the problem

[ankur rathi]

Better way would be:

if(!temp_file.exists())