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    <p>I used following for my highschool project long time ago. Due to my poor English skills I do not really understand what class you wish to save and load (LinkedList or myMainClass), but I used this solution to successfully store and load any of my custom objects. I hope you find it handy.</p> <p>Usage:</p> <pre><code>myMainClass object; // // ... your code fillin up the content of object // MyIO io = new MyIO(); io.save("", "myfile.dat", object); // "" as first argument will make java use current working directory // to load the object: myMainObject object = (myMainObject) io.load("", "myfile.dat"); </code></pre> <p>Source:</p> <pre><code>import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream; import java.io.FileOutputStream; import java.io.FileInputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.IOException; public class MyIO { // String path - path to the directory where the file is supposed to be saved. // String filename - the name of the file // Object data - object that you wish to save in the file. In your case "myMainClass" public void save(String path, String filename, Object data) { try { FileOutputStream fos = new FileOutputStream(path + filename, false); GZIPOutputStream gzos = new GZIPOutputStream(fos); ObjectOutputStream out = new ObjectOutputStream(gzos); out.writeObject(data); out.flush(); out.close(); } catch (IOException e) { System.out.println(e); } } // String path - path to the directory where the file is stored // String filename - the name of the file // The function returns java object which can be cast to myMainClass. public Object load(String path, String filename) { try { FileInputStream fis = new FileInputStream(path + filename); GZIPInputStream gzis = new GZIPInputStream(fis); ObjectInputStream in = new ObjectInputStream(gzis); Object data = in.readObject(); in.close(); return data; } catch (Exception e) { System.out.println(e); } return null; } } </code></pre>
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    1. POHow to read/write an object that has linked lists in a file
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    1. USuser1581900
    1. USuser1581900
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    1. COWhy the downvote? At least provide some feedback, so I can improve my answers for the future...
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    2. CO@user1581900 I didn't downvote. But I'd say the problem is that you wrote a bunch of code without any sort of explanation. Also the code is hard to read because it's poorly formatted.
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      1. USVivin Paliath
    3. CO@BilltheLizard I suppose you are somehow right. I added some comments and explanation, which hopefully boosts the quality of my post. I will keep your critic in mind for the future.
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