unintentionally overwritting properties 1

[russland]

Hi,

I store my properties to a file after i populated them with strings using the setProperty(String key, String value) method. However, it keeps overwriting the properties that i have not changed during this action. So I first loaded the properties with an input stream of the file. Didn't help neither. How do I need to store correctly without loosing the other existing entries in the properties file?

Properties prop = new Properties();
String propFile = "User.properties";
FileOutputStream out = new FileOutputStream(propFile);
Date d = new Date();
try {
    prop.load(new FileInputStream(propFile));
    prop.setProperty("Room", "23");
    prop.store(out, "Saved on " + d.toString());
} catch (IOException ex) {
    Logger.getLogger(JPanelUserSettings.class.getName()).log(Level.SEVERE, null, ex);
}

 

[russland]

Okay, here's the solution. One needs to load the

prop.load(new FileInputStream(propFile));

before the

FileOutputStream out = new FileOutputStream(propFile);

 

[Diancecht]

Don't forget to close the file after finishing and in the catch block ...

Cheers,
Dian

 

[russland]

From looking at the API there's no close method. What method do you refer to?

thanks for the comment.

 

[Diancecht]

FlieOutputStream.close()

Cheers,
Dian

 

[russland]

Right!