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Difference between Arrays.asList(array) and new ArrayList(Arrays.asList(array))
...his is because ArrayList resulting from Arrays.asList() is not of the type java.util.ArrayList . Arrays.asList() creates an ArrayList of type java.util.Arrays$ArrayList which does not extend java.util.ArrayList but only extends java.util.AbstractList
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Is there a concurrent List in Java's JDK?
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There is a concurrent list implementation in java.util.concurrent. CopyOnWriteArrayList in particular.
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Java heap terminology: young, old and permanent generations?
...What the concepts of young , old and permanent generations are in the Java heap terminology, and more specifically the interactions between the three generations.
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java get file size efficiently
While googling, I see that using java.io.File#length() can be slow.
FileChannel has a size() method that is available as well.
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What is the easiest way to parse an INI file in Java?
I am writing a drop-in replacement for a legacy application in Java. One of the requirements is that the ini files that the older application used have to be read as-is into the new Java Application. The format of this ini files is the common windows style, with header sections and key=value pairs...
How to invoke a Linux shell command from Java
I am trying to execute some Linux commands from Java using redirection (>&) and pipes (|). How can Java invoke csh or bash commands?
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Causes of getting a java.lang.VerifyError
I'm investigating the following java.lang.VerifyError
25 Answers
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Java: function for arrays like PHP's join()?
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Starting from Java8 it is possible to use String.join().
String.join(", ", new String[]{"Hello", "World", "!"})
Generates:
Hello, World, !
Otherwise, Apache Commons Lang has a StringUtils class which has a join function which will jo...
What's Up with Logging in Java? [closed]
...) - I don't think it is sensible to decide using this point as the reason.
Java logging because you don't want to add in an extra jar.
SLF4j because it's newer than Commons Logging and provides parameterized logging:
logger.debug("The entry is {}.", entry);
//which expands effectively to
if (log...
完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
...解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题问题描述：phpcms批量移动内容 文章，批量更新URL -> "批量更新内容页"后，发现原内容的评论、新闻心情全部丢失，这还不算差，后台评论排...问题描述：
phpcms批量...