It&#39;s as simple as:

    if (value.compareTo(BigDecimal.ZERO) &gt; 0)

The [documentation for `compareTo`][1] actually specifies that it will return -1, 0 or 1, but the more general `Comparable&lt;T&gt;.compareTo` method only guarantees less than zero, zero, or greater than zero for the appropriate three cases - so I typically just stick to that comparison.


  [1]: http://download.oracle.com/javase/6/docs/api/java/math/BigDecimal.html#compareTo(java.math.BigDecimal)

[Possible better way][1]:

    if (value.signum() &gt; 0)

`signum` returns -1, 0, or 1 as the value of this BigDecimal is negative, zero, or positive.


  [1]: http://download.oracle.com/javase/6/docs/api/java/math/BigDecimal.html#signum%28%29

Use `compareTo()` function that&#39;s built into the class.


it is safer to use the method `compareTo()` 

        BigDecimal a = new BigDecimal(10);
        BigDecimal b = BigDecimal.ZERO;

        System.out.println(&quot; result ==&gt; &quot; + a.compareTo(b));
console print

        result ==&gt; 1

`compareTo()` returns

&gt;  - **1**     if a is greater than b
&gt;  - **-1**    if a is less than b
&gt;  - **0**     if a is equal to b

now for your problem you can use
     
    if (value.compareTo(BigDecimal.ZERO) &gt; 0)

or

    if (value.compareTo(new BigDecimal(0)) &gt; 0)

I hope it helped you.

using &quot;.intValue()&quot; on BigDecimal object is not right when you want to check if its grater than zero. The only option left is &quot;.compareTo()&quot; method.

This works in **Kotlin**:

value &gt; BigDecimal.ZERO

   

     BigDecimal obj = new BigDecimal(&quot;100&quot;);
     if(obj.intValue()&gt;0)
        System.out.println(&quot;yes&quot;);

I&#39;m trying to learn shell scripting, and I need to understand someone else&#39;s code. What is the `$?` variable hold? I can&#39;t Google search the answer because they block punctuation characters.

What is the $? (dollar question mark) variable in shell scripting?

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Compare if BigDecimal is greater than zero

<p>How can I compare if <code>BigDecimal</code> value is greater than zero?</p>


We are using SLF4J+Logback combination at our project for a while now and are quite happy with it, but our logging strategy is fairly simple, using straightforward class based loggers and no fancy stuff like MDC or Markers.

What I want to know is if anybody in the community actually uses these features and how they are used to improve logging/filtering.

I am specially interested in where, why and how would one use&lt;sup&gt;[1]&lt;/sup&gt; Markers for logging. They strike me as a pretty neat feature for adding semantic context into the logging - e.g. while a class may be handling multiple concerns, one may use task/concern specific markers to discriminate log statements.

What may be the best practices, conventions or strategies for creating and using markers in logging.

**Update:** I guess, what I am really after is not so much _why_ to use markers, but rather the _how_ part &amp;mdash; is there some good practices of naming markers (e.g. using plain text with spaces or dash/underscore/punctuation delimited keyword style names), should there be some sort of pool of &quot;standard names&quot;, naming stuff based on the business functions. The questions I can probably figure out for myself, but if I want to use these features systematically and introduce them to a team of developers, it makes sense to have some formalizeable set of guidelines around...

---

&lt;sup&gt;[1]&lt;/sup&gt; - By asking how to _use_ markers I am not really asking how to use API (it is really quite straight forward) - I am rather referring to the more general level of how would one set up logging around using markers consistently

Best practices for using Markers in SLF4J/Logback

I&#39;m trying to know if a class is an Enum, but I think I&#39;m missing something:

    if (test.MyEnum.class instanceof Enum&lt;?&gt;.class)
     obj = resultWrapper.getEnum(i, test.MyEnum.class);
    else 
     obj = resultWrapper.getObject(i);

It gives me an error saying that Enum&lt;?&gt;.class is not valid. So how I can check if a class is a Enum? I&#39;m pretty sure it is possible to determine that, I&#39;m just unable to get it.

Thanks


Checking if a class is java.lang.Enum

I&#39;m learning SpringMVC framework and checked out a copy of their code:
https://src.springframework.org/svn/spring-samples/mvc-basic/trunk/
I can do maven build, install and everything. But on Eclipse, run on server option never appeared. I have tomcat server up and running, also got plugin for eclipse. Why run on server option is missing? This is a Ubuntu machine.
When I tried the exact same thing on my Windows machine, everything was fine. It has the same version of eclipse and all sorts of plugins installed as the Ubuntu machine. I was able to launch it from Eclipse &quot;run on server&quot; option there.

Can someone help me to figure out why? Thanks.

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The diamond operator in java 7 allows code like the following:

    List&lt;String&gt; list = new LinkedList&lt;&gt;();

However in Java 5/6, I can simply write:

    List&lt;String&gt; list = new LinkedList();

My understanding of type erasure is that these are exactly the same. (The generic gets removed at runtime anyway). 

Why bother with the diamond at all? What new functionality / type safety does it allow? If it doesn&#39;t yield any new functionality why do they mention it as a feature? Is my understanding of this concept flawed?

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I generally avoid casting types as much as possible since I am under the impression that it&#39;s poor coding practice and may incur a performance penalty. 

But if someone asked me to explain why exactly that is, i would probably look at them like a deer in headlights.

So why/when is casting bad? 

Is it general for java, c#, c++ or does every different runtime environment deal with it on it&#39;s own terms? 

Specifics for a any language are welcome, example why is it bad in c++?

Why should casting be avoided?

&gt; **Possible Duplicate:**  
&gt; [Easiest way to compare arrays in C#](https://stackoverflow.com/questions/3232744/easiest-way-to-compare-arrays-in-c-sharp)  

&lt;!-- End of automatically inserted text --&gt;

How can I compare two arrays in C#?

I use the following code, but its result is false. I was expecting it to be true.

    Array.Equals(childe1,grandFatherNode);


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I have a collection `T`, with 2 fields: `Grade1` and `Grade2`, and I want to select those with condition `Grade1 &gt; Grade2`, how can I get a query like in MySQL?

    Select * from T Where Grade1 &gt; Grade2



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I have the following codes:       

    if date in (start, end):
            print(&#39;in between&#39;)
    else:
            print(&#39;No!&#39;)
date, start and end are all variables with the format of 1/1. What should I do to have it print out the right result? i tried date as 10/2, start as 3/14 and end as 11/7 and it&#39;s print &#39;No!&#39;, which means it&#39;s not running right. I guess have to format them to a date format and then compare them.



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How can I check for null values in JavaScript? I wrote the code below but it didn&#39;t work.

    if (pass == null || cpass == null || email == null || cemail == null || user == null) {      

        alert(&quot;fill all columns&quot;);
        return false;  
    
    }   

And how can I find errors in my JavaScript programs?

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I want to compare the class type in Java.

I thought I could do this:

    class MyObject_1 {}
    class MyObject_2 extends MyObject_1 {}
    
    public boolean function(MyObject_1 obj) {
       if(obj.getClass() == MyObject_2.class) System.out.println(&quot;true&quot;);
    }

I wanted to compare in case if the obj passed into the function was extended from MyObject_1 or not.
But this doesn&#39;t work. It seems like the getClass() method and the .class gives different type of information.

How can I compare two class type, without having to create another dummy object just to compare the class type?

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Why does the following code raise the exception shown below?

    BigDecimal a = new BigDecimal(&quot;1.6&quot;);
    BigDecimal b = new BigDecimal(&quot;9.2&quot;);
    a.divide(b) // results in the following exception.

Exception:

    java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.

ArithmeticException: &quot;Non-terminating decimal expansion; no exact representable decimal result&quot;

I have this little crazy method that converts BigDecimal values into nice and readable Strings.

    private String formatBigDecimal(BigDecimal bd){
        DecimalFormat df = new DecimalFormat();
        df.setMinimumFractionDigits(3);
        df.setMaximumFractionDigits(3);
        df.setMinimumIntegerDigits(1);
        df.setMaximumIntegerDigits(3);
        df.setGroupingSize(20);
        return df.format(bd);
    }

It however, also produces a so called grouping separator `&quot;,&quot;` that makes all my values come out like this:

    xxx,xxx

I do need the separator to be a dot or a point and not a comma. 
Does anybody have a clue of how to accomplish this little feat?

I have read [this][1] and in particular [this][2] to death now but I cannot find a way to get this done.
Am I approaching this the wrong way? Is there a much more elegant way of doing this? Maybe even a solution that accounts for different local number representations, since the comma would be perfect by European standards.

  [1]: http://developer.android.com/reference/java/math/BigDecimal.html
  [2]: http://developer.android.com/reference/java/text/DecimalFormat.html

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I have String representation of a BigDecimal that I want to format with a thousands separator and return as String.


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I&#39;ve been trying to convert a value of seconds (in a BigDecimal variable) to a string in an editText like &quot;1 hour 22 minutes 33 seconds&quot; or something of the kind. 

I&#39;ve tried this:

    String sequenceCaptureTime = &quot;&quot;;
    BigDecimal roundThreeCalc = new BigDecimal(&quot;0&quot;);
    BigDecimal hours = new BigDecimal(&quot;0&quot;);
    BigDecimal myremainder = new BigDecimal(&quot;0&quot;);
    BigDecimal minutes = new BigDecimal(&quot;0&quot;);
    BigDecimal seconds = new BigDecimal(&quot;0&quot;);
    BigDecimal var3600 = new BigDecimal(&quot;3600&quot;);
    BigDecimal var60 = new BigDecimal(&quot;60&quot;);

(I have a roundThreeCalc which is the value in seconds so I try to convert it here.)

    hours = (roundThreeCalc.divide(var3600));
    myremainder = (roundThreeCalc.remainder(var3600));
    minutes = (myremainder.divide(var60));
    seconds = (myremainder.remainder(var60));
    sequenceCaptureTime =  hours.toString() + minutes.toString() + seconds.toString();

Then I set the editText to sequnceCaptureTime String.
But that didn&#39;t work. It force closed the app every time. I am totally out of my depth here, any help is greatly appreciated. Happy coding! 

Convert seconds value to hours minutes seconds?

When dealing with real world monetary values, I am advised to use BigDecimal instead of Double.But I have not got a convincing explanation except, &quot;It is normally done that way&quot;.

Can you please throw light on this question?

Content Type	Original Author	Original Content on Stackoverflow
Question	Santhosh	View Question on Stackoverflow
Solution 1 - Java	Jon Skeet	View Answer on Stackoverflow
Solution 2 - Java	Anton Bessonov	View Answer on Stackoverflow
Solution 3 - Java	duffymo	View Answer on Stackoverflow
Solution 4 - Java	yOshi	View Answer on Stackoverflow
Solution 5 - Java	Satya M	View Answer on Stackoverflow
Solution 6 - Java	RonaldPaguay	View Answer on Stackoverflow
Solution 7 - Java	Rama Krishna	View Answer on Stackoverflow

Compare if BigDecimal is greater than zero

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What does `unsigned` in MySQL mean and when to use it?

What is the $? (dollar question mark) variable in shell scripting?

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