Win a copy of OCP Java SE 8 Programmer II Exam Study Guide this week in the OCP forum!

Seymour Jones

Greenhorn
+ Follow
since Feb 05, 2018
Seymour likes ...
Eclipse IDE Java VI Editor
I have been a Java programmer for many years in the professional world.
Cows and Likes
Cows
Total received
0
In last 30 days
0
Total given
0
Likes
Total received
1
Received in last 30 days
0
Total given
0
Given in last 30 days
0
Forums and Threads
Scavenger Hunt
expand Ranch Hand Scavenger Hunt
expand Greenhorn Scavenger Hunt

Recent posts by Seymour Jones

If your on windows, you can check your PATH settings by typing echo %PATH% in a command window.
2 months ago

Norm Radder wrote:More clarification on the requirements:

keep the last 5 status results of a widget

Does that say there is a circular queue or list that holds the last 5 result packets.  Each result packet can have from 5 to 15 lines.



Each result packet can have up to 15 items (app1 - app15).

Each item has a "status" in order from oldest to most current and it will keep up to 5. Once you reach 5, the oldest status will be bumped off.
3 months ago
I am operating in an environment where there is a list of approved standards that I must adhere to and SQLite is not on the list.

A sample widget file would look something like this....

cat widget12345.stat

3 months ago
SQLite is not an option.

I mis-spoke on the widget files. Some will have 5 lines some may have up to 15 lines.
3 months ago
Let's first say that a database would be the best solution but unfortunately is not an option in this situation for reasons outside of my control.

You have an application that checks the status of a widget every 10 minutes. Let's say there are 2000 unique widgets to check.

The requirement is to keep the last 5 status results of a widget and it has to be stored in a file (widget12345.stat).

The application uses a ScheduledExecutorService to run every 10 minutes and a thread pool to do the work of checking the status of each widget and storing in a file.

Academically speaking, I hate using files, but have no choice. Is there any way around the File I/O bottleneck of updating 2000 files every 10 minutes?

Or there is not much that can be done here?
3 months ago
I suppose you take just take a filename by itself and toAbsolutePath() will assume the full path as the current working directory. Doesn't matter the file doesn't exist because we aren't trying to open/read/etc to the file.


Output:
3 months ago
I think your confusion is that reverseOrder() will reverse the natural order "alphabetically" and not "positionally".
3 months ago
Honesty I won't do java development without Eclipse. I find it invaluable in so many ways I can't list them here. It would be hard for me to create and manage a Maven project without Eclipse.
3 months ago
Ehhh, seems I am late again.

3 months ago
What is the length of text? What is number? Your substring is starting at the end of text to start with.
3 months ago
My interface names start with a capital letter and get named for what they are in general terms. So Widget, Bicycle, Boat, StorageContainer, etc.
3 months ago
Sure thing. These two ipv4 addresses in hex string format....



Will convert to these Strings....

Not sure the code describes everything. Are you expecting 1 or 2 or many arguments on the command line? Maybe provide the command line syntax? (exec arg1 arg2 arg3)
3 months ago
The result would need to be a properly formatted ipv4 address.
I probably didn't explain what I was needing to do good enough. Using your suggestion results in a number format exception. I did find what I needed to convert a hex string ipaddress to string.