java - 序列化 Arraylist

Question

我创建了一个名为“Item”的对象，并且我想序列化其中包含 Items 的 ArrayList。我的程序与 ArrayList<String> 完美配合，但它不适用于 ArrayList<Item> 。我相信这与我的对象有关。这是:

public class Item implements Serializable{

private static String name;
private static BufferedImage picture;
private static boolean craftable;
private static Item[][] craftTable;
private static boolean smeltable;
private static Item smelt_ancestor;
private static Item smelt_descendant;

public Item(String name, boolean craftable, boolean smeltable){
    this.name = name;
    this.craftable = craftable;
    if(craftable){
        craftTable = new Item[3][3];
    }else{
        craftTable = null;
    }
    this.picture = null;
    this.smeltable = smeltable;
    this.smelt_ancestor = null;
    this.smelt_descendant = null;
}

public String getName(){
    return name;
}

public void setName(String name){
    this.name=name;
}

public BufferedImage getPicture(){
    return picture;
}

public boolean setPicture(){
    boolean verify = false;
    String pictureName = name.replaceAll("\\s+","");
    String newNamePng = pictureName + ".png";
    String newNameJpg = pictureName + ".jpg";
    File imagePng = new File(newNamePng);
    File imageJpg = new File(newNameJpg);
    if(imagePng.exists()){
        return true;
    }else if(imageJpg.exists()){
        return true;
    }else{
        return false;
    }
}

public boolean getCraftable(){
    return craftable;
}

public void setCraftable(boolean value){

    this.craftable = value;
}

public boolean setCraftTable(Item[][] table){
    if(this.craftable==true){
        craftTable = table;
        return true;
    }else{
        return false;
    }

}

public Item[][] getCraftTable(){
    return craftTable;
}

public boolean getSmeltable(){
    return smeltable;
}

public void setSmeltable(boolean value){
    smeltable = value;
}

public Item getAncestor(){
    return smelt_ancestor;
}

public void setAncestor(Item ancestor){
    smelt_ancestor = ancestor;
}

public Item getDescendant(){
    return smelt_descendant;
}

public void setDescendant(Item des){
    smelt_descendant = des;
}

public String toString(){
    return name;
}

忽略导入，我在其他我省略的方法中使用它们，因为它们工作得很好。对象是否存在任何问题，可能会阻止其正确序列化？

Answer 1

静态变量未序列化。看起来您可能希望它们成为非静态实例变量。