apache-commons

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Good Hash function? (32-bit too small, 64-bit too large)

I need to generate a hash value used for uniqueness of many billions of records in Java.Trouble is, I only have 16 numeric digits to play with.In researching this, I have found algorithms for 32-bit h[详细]

2023-02-23 00:12 分类：问答
Handling empty argument to CommandLine in Commons Exec

I am trying to execute a bash script that takes 3 parameters from Java, following is the code where I create the command line[详细]

2023-02-21 17:21 分类：问答
Writing Output & Error to Log files using PumpStreamHandler

I have been searching for a while to get a good example for writing Process output & error stream to log file.[详细]

2023-02-20 19:31 分类：问答
Rreading a multi string argument using Apache commons

o.getValue() return the value for the option. But for a multi arg input, say -h this is a heading, the function returns only the first string \'this\';开发者_如何学运维 how do I fetch the full param:[详细]

2023-02-19 22:21 分类：问答
Commons method to test for an empty Java object graph?

I\'ve found myself writing a method like this: boolean isEmpty(MyStruct myStruct) { return (myStruct.getStringA() == null || myStruct.getStringA().isEmpty())[详细]

2023-02-19 18:09 分类：问答
UnknownHostexception using apache commons

I am currently working with apache commons in my Project to gain access to my FTP Serv开发者_开发技巧er.[详细]

2023-02-19 15:02 分类：问答
BidiMap Synchronization

When using the apache commonds bidimap, how do you handle synchronization.For example, if I create the map as shown below[详细]

2023-02-19 04:18 分类：问答
Are there any libraries for Apache POI Spreadsheets to handle r/w ing of formulas w/ more precision than double?

Initially i was after a BigDecimal with more functionality than the simple +-*/ which is significantly less than whats available on java.lang.Math.[详细]

2023-02-18 10:46 分类：问答
Java HtmlUnit onchange event not fired

I use HtmlUnit to fill form. I have a select SELECT_A. After selecting option the additional elements must appe开发者_如何学Pythonar in the page. But it\'s not working! I simulate Firefox 3.6.[详细]

2023-02-17 08:49 分类：问答
Good example of Spring Configuration using java.util.prefs or Commons Configuration

One application I\'m working on has several URLs and other information that is instance specific.The first pass uses a typical Spring PropertyPlaceholderConfigurer with a properties file:[详细]

2023-02-16 05:45 分类：问答