FULL PRODUCT VERSION :
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Darwin teknisk-dhcp288.basefarm.no 14.3.0 Darwin Kernel Version 14.3.0: Mon Mar 23 11:59:05 PDT 2015; root:xnu-2782.20.48~5/RELEASE_X86_64 x86_64

A DESCRIPTION OF THE PROBLEM :
After the fix for https://bugs.openjdk.java.net/browse/JDK-8040747, things like

  // just the dot separators of an IPv4 address, no digits
  isIPv4LiteralAddress("...")

will return true. Prior to the change, even a single missing octet ( isIPv4LiteralAddress(".0.0.0") ) would return false.

REGRESSION. Last worked in version 7u80

ADDITIONAL REGRESSION INFORMATION:
$ /Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/bin/java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
$ JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home scala -e 'for (a <- List("...", "0.0.0.", ".0.0.0", "0.0.0.0")) { println(a + "\t: " + sun.net.util.IPAddressUtil.isIPv4LiteralAddress(a)) }'
... : true
0.0.0. : true
.0.0.0 : true
0.0.0.0 : true

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
$ JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home scala -e 'for (a <- List("...", "0.0.0.", ".0.0.0", "0.0.0.0")) { println(a + "\t: " + sun.net.util.IPAddressUtil.isIPv4LiteralAddress(a)) }'
... : false
0.0.0. : false
.0.0.0 : false
0.0.0.0 : true

REPRODUCIBILITY :
This bug can be reproduced always.