integer from properties file

[nagesh siddu]

hi all,
i needed to read two integers from property file into a JSP. has any one got an example for this?
regards,
Nagesh

[Scott Selikoff]

Check out java.util.Properties.load(). Its a general method to read properties files from an InputStream and load them into a Properties object set.

Depending on where the data is coming from (the user, server, specific file location, etc) your code to read the file as and send it to a stream will vary.

[Adeel Ansari]

Originally posted by nagesh siddu:
i needed to read two integers from property file into a JSP. has any one got an example for this?

You get those integer values as string then after getting, you have to covert those into Integer/int, as per your requirement, in your code.

[Bear Bibeault]

Not really JSP-specific, so moved.

[Adam Richards]

In a universe far, far away, I approached this by extending the Properties class & addding getters & putters for specific datatypes. For example:

//--------------------------------------------------------------
/**
 * Retrieves an integer value.
 * @param key The key name.
 * @return The requested value (<code>null</code> if not found).
 */
public Integer getInteger(String key)
{
   Fault.check(key);
   Integer value = null;
   String string = getProperty(key);
   if (string != null)
      value = new Integer(string);
   return value;
}

[Rob Spoor]

What you can also do is the following:

Properties props = new Properties(System.getProperties());
props.load(someInputStream);
System.setProperties(props);
Integer i = Integer.getInteger("someProperty1");
Long l = Long.getLong("someProperty2");
Boolean b = Boolean.getBoolean("someProperty3");
Color c = Color.getColor("someProperty4");