我对Java还比较陌生,我有一个类Products
,它是可序列化的。我不知道自己做了什么,但我的程序停止工作并给出了这个错误:
Exception in thread "main" java.io.InvalidClassException: cockeb.Product;
local class incompatible: stream classdesc serialVersionUID = 1288455942608122525,
local class serialVersionUID = -558553967080513790
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:616)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1829)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1713)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1986)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
at java.util.ArrayList.readObject(ArrayList.java:791)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2122)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2013)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422
我搜索了一下,找到了声明的方法,但现在这并没有帮助到我。我甚至尝试新建一个项目,将每个类中的文本从不工作的项目复制并粘贴到新项目中,但仍然收到同样的错误提示。我在所有项目中都遇到了这个错误(它们都使用同一个Serializable类)。我需要知道我做错了什么以免再次发生,并且需要知道如何修复它。我已经尝试过声明serialversionUID,但没有起作用。
产品类
package cockeb;
import java.io.Serializable;
import java.math.BigDecimal;
public class Product implements Comparable<Product>, Serializable {
private String upc;
private String shortDetails;
private String longDetails;
private BigDecimal price;
private Integer stock;
public String getUpc() {
return upc;
}
public void setUpc(String upc) {
this.upc = upc;
}
public String getShortDetails() {
return shortDetails;
}
public void setShortDetails(String shortDetails) {
this.shortDetails = shortDetails;
}
public String getLongDetails() {
return longDetails;
}
public void setLongDetails(String longDetails) {
this.longDetails = longDetails;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public Integer getStock() {
return stock;
}
public void setStock(Integer stock) {
this.stock = stock;
}
@Override
public int compareTo(Product t) {
return this.getUpc().compareTo(t.getUpc());
}
}