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How to check if BigDecimal variable == 0 in java?
I have the following code in Java;
10 Answers
10
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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...
How to convert Set to String[]?
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From Java 7 we can use String[] GPXFILES1 = myset.toArray(new String[0]) and that's recommended. Update the answer. "Since late updates of OpenJDK 6 this call was intrinsified, making the performance of the empty array version th...
Case objects vs Enumerations in Scala
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Another point for case objects is if you care about java interoperability. The Enumeration would return the values as Enumeration.Value, thus 1) requiring scala-library, 2) losing the actual type information.
– juanmirocks
Oct 24 '12 at 9...
implements Closeable or implements AutoCloseable
I'm in the process of learning Java and I cannot find any good explanation on the implements Closeable and the implements AutoCloseable interfaces.
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?
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Hibernate is an object-relational mapping tool, a persistence framework.
JavaServer Faces is component-based presentation framework.
JavaServer Pages is a view technology used by all mentioned presentation framework for the view.
Tapestry is another component-based presentation framework.
So, to...
Java reflection - impact of setAccessible(true)
...lue of true indicates that the reflected object should suppress checks for Java language access control when it is used
And a runnable example:
public class FieldAccessible {
public static class MyClass {
private String theField;
}
public static void main(String[] args) throw...
Can “this” ever be null in Java?
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I don't know deeply about Java, but in C++ the this of an instance method could be NULL. So I am not quite convinced this is a sufficient reason in Java.
– kennytm
Sep 24 '10 at 17:32
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How to copy Java Collections list
...dge of the underlying type. In the case of Strings, which are immutable in Java (and .NET for that matter), you don't even need a deep copy. In the case of MySpecialObject, you need to know how to make a deep copy of it and that is not a generic operation.
Note: The originally accepted answer was...
How does the “final” keyword in Java work? (I can still modify an object.)
In Java we use final keyword with variables to specify its values are not to be changed.
But I see that you can change the value in the constructor / methods of the class. Again, if the variable is static then it is a compilation error.
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