?? externalexam.java
字號:
import java.io.*;
import java.util.*;
class Serial implements Externalizable{
String name = "張飛";
int age = 20;
public Serial(){
System.out.println("default constructor");
}
public Serial(String name,int age){
this.name = name;
this.age = age;
System.out.println("Not default constructor");
}
public void writeExternal(ObjectOutput out)throws IOException{
System.out.println("run writeExternal");
Date date=new Date();
out.writeObject(date);
out.writeObject(name);
out.writeInt(age);
System.out.println("date in stream is "+date);
}
public void readExternal(ObjectInput in)throws IOException,ClassNotFoundException{
System.out.println("run readExternal");
Date date=(Date)in.readObject();
name=(String)in.readObject();
age=in.readInt();
System.out.println("date in stream is "+date);
}
public String toString() {
return "name = " + name + ", age = " + age;
}
}
public class ExternalExam {
public static void main(String[] args) throws Exception{
ObjectOutputStream out=new ObjectOutputStream(
new FileOutputStream("hero.dat"));
Serial scrObj=new Serial("令狐沖",18);
System.out.println("將以下對象序列化");
System.out.println(scrObj);
out.writeObject(scrObj);
out.close();
System.out.println("開始從文件中恢復對象");
ObjectInputStream in=new ObjectInputStream(
new FileInputStream("hero.dat"));
Serial sObj=(Serial)in.readObject();
in.close();
System.out.println("恢復得到的對象");
System.out.println(scrObj);
}
}
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