A DESCRIPTION OF THE REQUEST :
Hi,

I am reporting a bug or an enhancement referring to the bug id [8132508](http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8132508).

Referring the comments:

```
RFC 952 disallows _ underscores in hostnames. So, this is not a bug. I also haven't been able to find examples of actual usage.
So, unless a particularly compelling case can be made, I'm closing as not a bug.
```

However, if hostname contains underscores is not a valid hostname, why it is in java.net.URL? More clearly, valid in java.net.URL INvalid in java.net.URI. These issue often confused developers and cannot get the consistent on lot of third-part jars.

The following statements demonstrate this issue:

new java.net.URI("http://test_1.tanglei.name").getHost() // = null
new java.net.URL("http://test_1.tanglei.name").getHost() // "test_1.tanglei.name"

Wish your reply.


JUSTIFICATION :
The following statements demonstrate this issue:

new java.net.URI("http://test_1.tanglei.name").getHost() // = null
new java.net.URL("http://test_1.tanglei.name").getHost() // "test_1.tanglei.name"

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
If the underscore is not valid in hostname, both URL and URI getHost should return null.
ACTUAL -
new java.net.URI("http://test_1.tanglei.name").getHost() return null
new java.net.URL("http://test_1.tanglei.name").getHost() return "test_1.tanglei.name"