FULL PRODUCT VERSION :
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Windows 8

zip file created with symbolic links retains the symbolic link when extracted from .zip file
Where as jar treat symbolic links as regular files.

1> Creat symbolic link for Test.java file
-sh-4.2$ ln -s Test.java Test2.java
-sh-4.2$ ls
Test2.java Test.java

2> zip using -y option
-sh-4.2$ zip -y abc.zip Test.java Test2.java
  adding: Test.java (stored 0%)
  adding: Test2.java (stored 0%)
-sh-4.2$ ls

3> unzip using unzip command
-sh-4.2$ unzip abc.zip
Archive: abc.zip
 extracting: Test.java
    linking: Test2.java -> Test.java
finishing deferred symbolic links:
  Test2.java -> Test.java

4>unzip using jar-xf command
jar -xf abc.zip
-sh-4.2$ ls
abc.zip Test2.java Test.java
-sh-4.2$ ls -la
total 16
drwxr-xr-x 2 fmatte dba 4096 Jul 19 22:24 .
drwxr-xr-x 4 fmatte dba 4096 Jul 19 22:22 ..
-rw-r--r-- 1 fmatte dba 325 Jul 19 22:22 abc.zip
-rw-r--r-- 1 fmatte dba 9 Jul 19 22:17 Test2.java
-rw-r--r-- 1 fmatte dba 0 Jul 19 22:16 Test.java

Test.java and Test2.java are shown as regular files. Test2.java is actual symbolic link file which is loast after jar -xf