the first time:
No jdk, jdk installed on it
the second time:
java environment variables did a good job, according to the following chart with the line:
Java_HOME and jre_HOME are jdk directory on the line
The last two lines without a try, it seems no matter much
Should these two reasons, there may be a port number is occupied, or firewall is not closed, both are easy to resolve, under the online search to ok
Then write down my steps:
After changing for the better, to source
And then start to look at:
