This resource offers a total of 630 Java Collection problems for practice. It includes 126 main exercises, each accompanied by solutions, detailed explanations, and four related problems. Java Collection refers to a framework provided by Java to store and manipulate groups of objects. It offers a ...
which optimizes the process of iterating through the elements in a collection. However, the iterators implemented in thejava.utilCollections classes are fail-fast, which means that if one thread changes a collection while another thread is traversing it through anIterator, the nextIterator.hasNext(...
You can apply this technique to your own problems and data models, too. You should see sensible speedups as long as you can rewrite your algorithms in a “divide and conquer” fashion that is free of I/O work and locking. Acknowledgements The author would like to thank Brian Goetz and Mi...
Unfortunately, developers generally have horrible intuition about where the performance problems in an application will actually be." Do you still believe this? It's truer today than it was four years ago, and more true for Java developers than it was for C. Most performance tuning reminds me...
Brian Gortz, ' Java theory and practice: Concurrent collections classes ', Jul. 23, 2003 (URL:http://www.ibm.com/developerworks/java/library/j-tp07233.html?S-TACT=105AG).Java theory and practice: Concurrent collections classes.http://www.ibm.com/developerworks/java/library/j-jtp07233/...
How many garbage collections were run? For how long were the garbage collectors running? What was the memory utilization before and after garbage collection? Let’s now look at an example taken out of a JVM garbage collector log and analyze each fragment highlighting the crucial parts behind it...
1. private Map selectSqls = Collections.synchronizedMap(new HashMap()) 2. public Map executeSelect(final TableConfig tableConfig, Map keys) { 3. PreparedSql psql = null; 4. synchronized(selectSqls) { 5. if (selectSqls.get(tableConfig.getId()) == null) { 1. 2. 3. 4. 5. 13. ...
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Apache Commons Collections - Commons-Collections seek to build upon the JDK classes by providing new interfaces, implementations and utilities. Hello World examples. License: Apache 2. Gs collections A supplement or replacement for the Java Collections Framework. Hello World examples. License: Apache...
collections by matching object allocation and survival rates. If you have problems with application pause times that are caused by global garbage collections, particularly compactions, this policy might improve application performance. If you are using large systems that have Non-Uniform Memory ...