FULL PRODUCT VERSION :
Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Administrator>java -version
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b14)
Java HotSpot(TM) Client VM (build 24.55-b03, mixed mode, sharing)



ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.



EXTRA RELEVANT SYSTEM CONFIGURATION :
Netbeans IDE 7.4

A DESCRIPTION OF THE PROBLEM :
*
 * @author Administrator
 */
public class Calculator {
    public static void main (String[] args)
    {
        Calculator c = new Calculator();
        //preceeding numbers with a zero means that they are in octal.
        System.out.println(c.add(01000, 03000));
    }
    public int add (int a, int b)
    {return a + b;}
    
}

REGRESSION. Last worked in version 7u55

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
1000 + 3000 = 4000
Tested this using Windows Calculator in Octal mode.
ACTUAL -
run:
2048
BUILD SUCCESSFUL (total time: 0 seconds)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
*
 * @author Administrator
 */
public class Calculator {
    public static void main (String[] args)
    {
        Calculator c = new Calculator();
        //preceeding numbers with a zero means that they are in octal.
        System.out.println(c.add(01000, 03000));
    }
    public int add (int a, int b)
    {return a + b;}
    
}
---------- END SOURCE ----------