我有幾個系列化和Data
對象java.lang.Integer
但在使用流Data
對象值讀取數據的對象,而在java.lang.Integer
對象的情況下讀取值是否正確不正確讀取。Java對象序列化的問題,而讀對象
Data.java
public class Data implements Serializable{
private Integer count ;
public void setCount(Integer count) {
this.count = count;
}
public Integer getCount() {
return count;
}
}
SerializationTest.java
public class SerializationTest {
public static void main(String[] args) {
ObjectOutputStream oos = null;
ObjectOutputStream oosD = null;
ObjectInputStream ois = null;
ObjectInputStream oisD = null;
try{
oos = new ObjectOutputStream(new FileOutputStream(new File("integer1.dat"),false));
oosD = new ObjectOutputStream(new FileOutputStream(new File("Data1.dat"),false));
Data data = new Data();
data.setCount(10);
oos.writeObject(new Integer(10));
oosD.writeObject(data);
data.setCount(100);
oos.writeObject(new Integer(100));
oosD.writeObject(data);
data.setCount(1000);
oos.writeObject(new Integer(1000));
oosD.writeObject(data);
oos.close();
oosD.close();
ois = new ObjectInputStream(new FileInputStream(new File("integer1.dat")));
System.out.println("Integer output");
System.out.println("First Object : "+ (Integer)ois.readObject());
System.out.println("Second Object : "+ (Integer)ois.readObject());
System.out.println("Third Object : "+ (Integer)ois.readObject());
ois.close();
System.out.println("Data output");
oisD = new ObjectInputStream(new FileInputStream(new File("Data1.dat")));
System.out.println("First Object : "+ ((Data)oisD.readObject()).getCount());
System.out.println("Second Object : "+ ((Data)oisD.readObject()).getCount());
System.out.println("Third Object : "+ ((Data)oisD.readObject()).getCount());
oisD.close();
}
catch(IOException ioe){ ioe.printStackTrace(); }
catch(Exception e){ e.printStackTrace(); }
}
}
輸出:
Integer output
First Object : 10
Second Object : 100
Third Object : 1000
Data output
First Object : 10
Second Object : 10
Third Object : 10
任何人可以幫助我找出問題與Data
對象?
正如我改變數據值的值,那麼它應該保存最後一個值不是第一對象的值。 – 2013-05-01 14:42:15
@AlpeshGediya - 我確實改正了你的理解,我的答案的哪部分你不明白? – jtahlborn 2013-05-01 14:59:05
作爲整數是不可變的分類,如果我改變了那些整數的值,那麼它們的引用將會不同,所以我應該指向Integer對象的當前值,並且當引用被改變時,它應該存儲新的值。 – 2013-05-01 15:03:05