JCK 1.3 test lang/EXPR/expr348/expr34801/expr34801.html and the following
test fail under Linux and Windows OS due to the same reason.
Minus '-' is printed before zero value when float zero is transformed to string.

JDK version:
java version "1.3.1beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1beta-b08)
Java HotSpot(TM) Client VM (build 1.3.1beta-b08, mixed mode)

------------------------test.java----------------------------------------------
public class test {
        public static void main(String args[]) {
                float zerof = + 0.0f;
                double zerod = + 0.0d;
                String s=Float.toString(0.0f - zerof);
                if (s.startsWith("-"))
                    System.out.println("Failed: "+s);
                else
                    System.out.println("Passed: "+s);
        }
}
-------------------------output-------------------------------------------------
[kotl@linux-14 ]$ java -server -Xcomp test
Failed: -0.0
[kotl@linux-14 ]$ java -client -Xcomp test
Passed: 0.0
[kotl@linux-14 ]$ java -client test
Passed: 0.0
[kotl@linux-14 ]$ java -server test
Passed: 0.0