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Preferred Java way to ping an HTTP URL for availability
...her feasible way is using java.net.Socket.
public static boolean pingHost(String host, int port, int timeout) {
try (Socket socket = new Socket()) {
socket.connect(new InetSocketAddress(host, port), timeout);
return true;
} catch (IOException e) {
return false; // Ei...
Gridview with two columns and auto resized images
... return v;
}
private static class Item {
public final String name;
public final int drawableId;
Item(String name, int drawableId) {
this.name = name;
this.drawableId = drawableId;
}
}
}
Set that adapter to your GridView:
@O...
Can someone explain this 'double negative' trick? [duplicate]
...eturn true.
The "falsey" values are:
false
NaN
undefined
null
"" (empty string)
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Convert string with comma to integer
...
@Abhinay Regarding your bench marks: sample size? String size?
– Michael Kohl
Sep 19 '14 at 18:36
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How to create a windows service from java app
...ith using Procrun, your start and stop methods must accept the parameters (String[] argv). For example "start(String[] argv)" and "stop(String[] argv)" would work, but "start()" and "stop()" would cause errors. If you can't modify those calls, consider making a bootstrapper class that can massage ...
Use '=' or LIKE to compare strings in SQL?
...he (almost religious) discussion, if you should use LIKE or '=' to compare strings in SQL statements.
9 Answers
...
Type erasure techniques
...oid>)> call;
call = reinterpret_cast<voidFun>(fun<std::string>);
call(std::make_shared<std::string>("Hi there!"));
call = reinterpret_cast<voidFun>(fun<int>);
call(std::make_shared<int>(33));
call = reinterpret_cast<voidFun>(fun&...
adb shell command to make Android package uninstall dialog appear
...package:your app package". This will start the activity in charge of uninstalling packages and try to uninstall the package provided in data. Documentation can be found by using "adb shell am" command.
– pcans
Oct 18 '12 at 9:23
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How do I view all commits for a specific day?
...ience!
The output below can be expanded/customised with pretty=format:<string> placeholders:
git log --pretty='format:%H %an %ae %ai' | grep 2013-11-12
Not 100% immune to errors as the same string could have been entered by a user. But acceptable depending on which placeholders are used. T...
Java heap terminology: young, old and permanent generations?
...ce for class definitions and related data. In Java 6 and earlier, interned strings were also stored in the permanent generation. In Java 7, interned strings are stored in the main object heap.
Here is a good post on permanent generation.
I like the descriptions given for each space in Oracle's gui...