Easy save/ load game

// at the top of a class:
import java.io.*;

// where you save:

// 1) setup:
// I don't know for sure if the file specified here has to already exist, you may need to research on that.
try {
    BufferedWriter bw = new BufferedWriter(new FileWriter("file.txt"));

    // 2) Create data to store

    // 3) Actually store the data.
    // You can do this by doing this:
    bw.write(<string to save>+"\n");
    bw.newLine();
    // for every line to save. Replace <string to save> with a String to save in the file.

    // 4) Close it:
    bw.close();
} catch (Exception e) {
    System.err.println("Error: "+e.getMessage());
}

try {
    InputStream is = getClass().getClassLoader().getResourceAsStream(FOLDER+file);
    if (is == null) {
        System.err.println("The file: "+file+" does not exist.");
        return;
    }
    BufferedReader r = new BufferedReader(new InputStreamReader(is));
    String l = r.readLine();
    while (l != null) { // the line will be null when the end of the file is reached
        // process the current line

        l = r.readLine(); // load the next line
    }
    r.close(); // close it
} catch (Exception e) {
    System.err.println("Error: "+e.getMessage());
}