SQLite android - an if condition that checks whether column name equals a certain value then executes the if statement

I am trying to update the value of a boolean field in an sqlite database column, i first want to check if the value of the field is 0 then if yes it should update the value to 1.

This is what i have so far:

String where = "student_number=?";
String[] whereArgs = new String[]{compare};
ContentValues cv = new ContentValues();
cv.put("student_number", 1);

if ("student_number" == "0") {
    db.update("course1", cv, where, whereArgs);
    Toast.makeText(getApplicationContext(), "Attendance Taken", Toast.LENGTH_LONG).show();
} else {
    Toast.makeText(getApplicationContext(), "Attendance already registered.", Toast.LENGTH_LONG).show();
}

But it's not updating, i think the problem is with the if condition.