英文:
NotSerializableException on anonymous class using Comparator
问题
我收到了NotSerializableException，原因是匿名内部类，如何使此自定义比较器为TreeSet也实现Serializable接口。
badPatients = new TreeSet<Patient>(new Comparator<Patient>() {public int compare(Patient p1, Patient p2) {if (p1.getStatus() > p2.getStatus())return -1;if (p1.getStatus() == p2.getStatus())return 0;return 1;}});
英文:
I'm getting NotSerializableException and the reason is an anonymous inner class how can I make this customized comparator for a TreeSet implements Serializable interface too .
badPatients = new TreeSet<Patient>(new Comparator <Patient>() {public int compare(Patient p1,Patient p2) {if(p1.getStatus() > p2.getStatus())return -1;if(p1.getStatus() == p2.getStatus())return 0;return 1;}});
答案1
得分: 1
以下是翻译好的部分：
你可以创建一个自定义接口，它扩展了 Comparator<T> 并且也扩展了 Serializable：
SerializableComparator.java
public interface SerializableComparator<T> extends Comparator<T>, Serializable {// 这里没有内容}
在你的代码中，将参数从 Comparator<Parent> 更改为 SerializableComparator<Parent>。
badPatients = new TreeSet<Patient>(new SerializableComparator<Patient>() {public int compare(Patient p1, Patient p2) {if (p1.getStatus() > p2.getStatus())return -1;if (p1.getStatus() == p2.getStatus())return 0;return 1;}});
英文:
You can create a custom interface that extends Comparator<T> and also extends Serializable:
SerializableComparator.java
public interface SerializableComparator<T> extends Comparator<T>, Serializable {//Nothing here}
In your code, change the argument from Comparator<Parent> to SerializableComparator<Parent>.
badPatients = new TreeSet<Patient>(new SerializableComparator<Patient>() {public int compare(Patient p1,Patient p2) {if(p1.getStatus() > p2.getStatus())return -1;if(p1.getStatus() == p2.getStatus())return 0;return 1;}});
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