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Why shouldn't Java enum literals be able to have generic type parameters?
Java enums are great. So are generics. Of course we all know the limitations of the latter because of type erasure. But there is one thing I don't understand, Why can't I create an enum like this:
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Is Random class thread safe?
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A guarantee has been added in the Java 7 docs: "Instances of java.util.Random are threadsafe." docs.oracle.com/javase/7/docs/api/java/util/Random.html
– Matt R
Jul 12 '13 at 14:38
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Array initialization syntax when not in a declaration
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Why is this blocked by Java?
You'd have to ask the Java designers. There might be some subtle grammatical reason for the restriction. Note that some of the array creation / initialization constructs were not in Java 1.0, and (IIRC) were added in ...
Initializing multiple variables to the same value in Java
... thing (especially the multiple assignments) would be frowned upon by most Java developers, who would consider it the opposite of "visually simple".
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IllegalArgumentException or NullPointerException for a null parameter? [closed]
...throw an IllegalArgumentException , or a NullPointerException ? From the javadocs, both seem appropriate. Is there some kind of an understood standard? Or is this just one of those things that you should do whatever you prefer and both are really correct?
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The split() method in Java does not work on a dot (.) [duplicate]
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java.lang.String.split splits on regular expressions, and . in a regular expression means "any character".
Try temp.split("\\.").
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Convert Java Object to JsonNode in Jackson [duplicate]
Is it possible to directly convert a Java Object to an JsonNode-Object?
1 Answer
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Intellij code formatting, Java annotations on new lines
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Navigate to Preferences → Editor → Code Style → Java → Wrapping and Braces tab, then locate the section Field annotations and check the option Do not wrap after single annotation.
In IntelliJ v14:
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Best way to convert list to comma separated string in java [duplicate]
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Java doesn't support single quotes
– Passionate Engineer
Oct 18 '15 at 15:21
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JAVA“无法启动该应用程序”的解决办法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
JAVA“无法启动该应用程序”的解决办法调用虚拟控制台时出现了如下的错误，无法启动该应用程序，如下：是因为JAVA的安全设置问题，进入C:Program Files (x86)Javajre7in，打开j...调用虚拟控制台时出现了如下的错误，“无法启动该...