MouseLearnJava

MouseLearnJava has asked 3 questions and find answers to 10 problems.

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I am working as Java/Java EE developer, my interests are on Java technologies.

MouseLearnJava questions

Difference of creating array
What is the advantage of cache mechanism change of Integer class in JDK 1.6 or above?
What is the advantage of null keys mechanism change of HashMap in JDK 1.6 or above version?

MouseLearnJava answers

How to set up collators strength and decomposition for sorting unicode string by first letter
Strange behavior in writing to file
java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlObject Error
What does hashmap check when it calls containsKey()?
When an IOException generally occur and what action should I take to properly handle it? [closed]
To see method in .class file embedded in jar file | is it possible ?
Fill an array with random numbers [duplicate]
Java POI API: Convert from *.xlsx to *.xls