Immediately after construction of a ZipInputStream, available()
        will return 0.  Sun's javadoc states, "Returns 0 after EOF has
        reached for the current entry data, otherwise always return 1."
        My interpretation is there is no current entry, so EOF hasn't
        been reached on it yet, so return 1.

Release:
3.3 20020828 (experimental)

Environment:
System: Linux churchill 2.4.3-12 #1 Fri Jun 8 15:05:56 EDT 2001 i686 unknown
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc/configure --prefix=/home/user/jmr/app/gcc --enable-langs=c++,java --enable-shared --enable-threads=posix --with-as=/home/user/jmr/app/binutils/bin/as --with-ld=/home/user/jmr/app/binutils/bin/ld : (reconfigured)

How-To-Repeat:
; cat ZISAvailTest.java
import java.net.URL;
import java.util.zip.ZipInputStream;

public class ZISAvailTest {
    public static void main(String[] s) throws Exception {
        URL u = new URL("http://www.xwt.org/dist/xwt-0258.jar");
        System.err.println(new ZipInputStream(u.openStream()).available());
    }
}

; gcj ZISAvailTest.java --main=ZISAvailTest      
; ./a.out
0

Whereas Sun's jdk gives:
; javac ZISAvailTest.java
; java ZISAvailTest
1