如何将数据从文本文件存储到对象数组？

Question

I already read data from a text file (in the file there are all numbers (int and double)) and in my class, I have an array of an object type. I have no idea how to put data which read from the txt file into the array.

I would greatly appreciate it if you can give me some answers.

 this.object=new Object[nums1];

 File file=new File("/homes/xx.txt");
 try {
      Scanner scnr=new Scanner(file);

      int lineNumber= 1;
      while (scnr.hasNextLine()) {
            String line = scnr.nextLine();
            System.out.println(line);
      }
 }
 catch (FileNotFoundException  e) {
     System.out.println(e);
 }

A couple of sample lines from my input file:

3
1.0 2.5 3.0

I think I need to distinguish between whole numbers and numbers with a decimal point. Should I create another object type so I can store int and double separately?

Answer 1

try this:

   File file=new File("/homes/xx.txt");
   try {
   Scanner scnr=new Scanner(file);
   List<String> lines = new ArrayList<String>();

  while (scnr.hasNextLine()) {
       lines.add(scnr.nextLine());
        System.out.println(lines);
    }

   String[] arr = lines.toArray(new String[0]);
  }
  catch (FileNotFoundException  e) {
  System.out.println(e);

Answer 2

If you have a space between your integers and doubles, try this:

Object []objects = file;
Object []numbers = objects.split(“ “);

I am not sure about Object []objects = file; part because I am new java learner too. But if you can insert whole text to an array, you can split and assign values one by one with .split command to another array.