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POData wrote using FileOutputStream disappear after restarting program
primarykey
Id
9115354
data
AcceptedAnswerId
9115794
AnswerCount
3
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2012-02-02T15:52:14.053
FavoriteCount
0
LastActivityDate
2012-02-02T16:17:04.940
LastEditDate
2012-02-02T16:12:12.757
LastEditorUserId
1152542
OwnerUserId
1152542
ParentId
0
PostTypeId
1
Score
0
ViewCount
673
LastEditorDisplayName
text
Body
I'm learning java and I have made simple program that simply reads value from JTextField and saves it to file using FileOutputStream. My question is: is it normal for data to be unreadable (using same program with FileInputStream) after restarting it? If i read it without terminating program it works fine. How can I make data wrote to file permament? Edit: It seems the file is being cleaned when starting the program. Here is the code: <pre><code>public class Test extends JFrame { JTextField field; JButton write; JButton read; File file; FileOutputStream fOut; FileInputStream fIn; int x; Test() throws IOException { setAlwaysOnTop(true); setLayout(new BorderLayout()); field = new JTextField(4); write = new JButton("Write"); read = new JButton("Read"); file = new File("save.txt"); if(!file.exists()) { file.createNewFile(); } fOut = new FileOutputStream(file); fIn = new FileInputStream(file); add(field); add(write, BorderLayout.LINE_START); add(read, BorderLayout.LINE_END); setVisible(true); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(160,60); write.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { x = Integer.parseInt(field.getText()); try { fOut.write(x); System.out.println("Saving completed."); fOut.flush(); } catch(Exception exc) { System.out.println("Saving failed."); } } }); read.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try { x = fIn.read(); fIn.close(); } catch(Exception exc) { System.out.println("Reading failed."); } } }); } public static void main(String[] args) throws IOException { new Test(); } } </code></pre>
Tags
<java><io>
Title
Data wrote using FileOutputStream disappear after restarting program
singulars
PostAcceptedAnswerId
1. PO
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 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USBoblob
UserOwnerUserId
1. USBoblob
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1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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 PostTypePostTypeId
 PTAnswer
2. PO
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 PostTypePostTypeId
 PTAnswer
3. PO
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 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

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