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Using Enum values as String literals
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JavaDoc: String java.lang.Enum.name() Returns the name of this enum constant, exactly as declared in its enum declaration. Most programmers should use the toString method in preference to this one, as the toString method may return a more user-f...
How to create an instance of anonymous class of abstract class in Kotlin?
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From the official Kotlin language documentation:
window.addMouseListener(object : MouseAdapter() {
override fun mouseClicked(e : MouseEvent) {
// ...
}
Applied to your problem at hand:
val keyListener = object : KeyAdapter() {
ove...
Java List.add() UnsupportedOperationException
...a", "b" ,"c"});
try {
list_of_Arrays.add("Yashwanth.M");
} catch(java.lang.UnsupportedOperationException e) {
System.out.println("List Interface executes AbstractList add() fucntion which throws UnsupportedOperationException.");
}
System.out.println("Arrays → List : " + list_of_Arrays);
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Is there a foreach loop in Go?
Is there a foreach construct in the Go language? Can I iterate over a slice or array using a for ?
8 Answers
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throws Exception in finally blocks
...rce is closed at the end of the statement. Any object that implements java.lang.AutoCloseable, which includes all objects which implement java.io.Closeable, can be used as a resource.
Assume the following code:
try( Connection con = null;
Statement stmt = con.createStatement();
Result rs...
How do I reverse an int array in Java?
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With Commons.Lang, you could simply use
ArrayUtils.reverse(int[] array)
Most of the time, it's quicker and more bug-safe to stick with easily available libraries already unit-tested and user-tested when they take care of your problem....
Spring Boot: How can I set the logging level with application.properties?
...level.=DEBUG will cause application fail to start, and getting error: java.lang.ClassCircularityError: java/util/logging/LogRecord
– Eric Wang
Sep 19 '16 at 19:13
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Case insensitive string as HashMap key
... = createObject('java','java.util.TreeMap').init(createObject('java','java.lang.String').CASE_INSENSITIVE_ORDER); FUGLY, but it works ;)
– Eric Fuller
Nov 27 '14 at 4:09
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What does the “assert” keyword do? [duplicate]
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(If you launched with -enableassertions that is.)
Formally, the Java Language Specification: 14.10. The assert Statement says the following:
14.10. The assert Statement
An assertion is an assert statement containing a boolean expression. An assertion is either enabled or disabled. If the...
How to fix Hibernate LazyInitializationException: failed to lazily initialize a collection of roles,
...om AuthenticationProvider like you suggest, I get an error Caused by: java.lang.IllegalArgumentException: Can not set com.horariolivre.security.CustomAuthenticationProvider field com.horariolivre.security.SecurityConfig.authenticationProvider to $Proxy36. I get the same error if I use the add fetchT...