小编Dav*_*lor的帖子

尝试将对象写入数组，然后保存到output.data，然后再次读取对象。

写作：

private void saveBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        

    File outFile;
    FileOutputStream fStream;
    ObjectOutputStream oStream;

    try {
        outFile = new File("output.data");
        fStream = new FileOutputStream(outFile);
        oStream = new ObjectOutputStream(fStream);

        oStream.writeObject(arr);

        JOptionPane.showMessageDialog(null, "File Written Successfully");

        oStream.close();
    } catch (IOException e) {
        System.out.println("Error: " + e);
    }
}                  

阅读：

private void readBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        

    File inFile;
    FileInputStream fStream;
    ObjectInputStream oStream;

    try {
        inFile = new File("output.data");
        fStream = new FileInputStream(inFile);
        oStream = new ObjectInputStream(fStream);

        //create an array of assessments
        ArrayList <Assessment> xList;
        xList = …