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Getting all names in an enum as a String[]
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Here's one-liner for any enum class:
public static String[] getNames(Class<? extends Enum<?>> e) {
return Arrays.stream(e.getEnumConstants()).map(Enum::name).toArray(String[]::new);
}
Pre Java 8 is still a one-lin...
What is Persistence Context?
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can one PersisnteceContext have any EntityManager instances? And can one Entity Manager have any PersistenceContext? PersisntenceContext is only one for all application?
– Roberto
Feb 6 '1...
Android getting value from selected radiobutton
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In case, if you want to do some job on the selection of one of the radio buttons (without having any additional OK button or something), your code is fine, updated little.
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstance...
When should you not use virtual destructors?
...irtual destructor for a class? When should you specifically avoid writing one?
12 Answers
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How to read the value of a private field from a different class in Java?
I have a poorly designed class in a 3rd-party JAR and I need to access one of its private fields. For example,
why should I need to choose private field is it necessary?
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Is there a practical use for weak references? [duplicate]
...situations in which people use weak references?
There are many. A common one is to achieve a performance goal. When performance tuning an application one often must make a tradeoff between more memory usage and more time usage. Suppose for example there is a complex calculation that you must perfo...
How do disable paging by swiping with finger in ViewPager but still be able to swipe programmaticall
...sable the paging by swiping with finger horizontally. Thus, the paging is done ONLY by clicking on the buttons.
So, how I can disable the swiping with finger?
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How do I do string replace in JavaScript to convert ‘9.61’ to ‘9:61’?
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This won't work if we try to replace more than one value at a time. :(
– vissu
May 28 '12 at 13:06
56
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PHP PDO returning single row
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Just fetch. only gets one row. So no foreach loop needed :D
$row = $STH -> fetch();
example (ty northkildonan):
$dbh = new PDO(" --- connection string --- ");
$stmt = $dbh->prepare("SELECT name FROM mytable WHERE id=4 LIMIT 1");
$stmt...
How to clone ArrayList and also clone its contents?
How can I clone an ArrayList and also clone its items in Java?
21 Answers
21
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