java.io.File and properties

Fri May 9 06:20:00 GMT 2003

> Michael> I have question: java.io.File initializes a static variable called 
> Michael> tmpdir at class initialization with the value of the property 
> Michael> "java.io.tmpdir". If an app changes the value of this property after 
> Michael> java.io.File.tmpdir has been initialized java.io.File will use the 
> Michael> old value.
>> What does the JDK do?

Given the following program:
-------------------------------- 8< --------------------------------
import java.util.*;
import java.io.*;
public class T {
 public static void main( String[] args) throws Exception {
 System.out.println( System.getProperty( "java.io.tmpdir"));
 System.out.println( File.createTempFile( "java", null));
 Properties props = System.getProperties( );
 props.put( "java.io.tmpdir", "C:\\TEMP\\");
 System.out.println( System.getProperty( "java.io.tmpdir"));
 System.out.println( File.createTempFile( "mocha", null));
 }
}
-------------------------------- 8< --------------------------------
JRE 1.4.1_01 on Windows gives the following output:
-------------------------------- 8< --------------------------------
D:\TEMP\
D:\TEMP\java35585.tmp
C:\TEMP\
D:\TEMP\mocha35586.tmp
-------------------------------- 8< --------------------------------
So while the change to "java.io.tmpdir" is noted, temporary files
are *still* created in the original temporary folder.
So is this is a bug in Classpath?
Ranjit.