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- java - How to know the jdk version on my machine? - Stack Overflow
Java Runtime JRE and the Java development kit JDK are two separate things If you want to check the version of the Java compiler used within your local JDK use javac -version
- java - Jackson serialization: ignore empty values (or null) - Stack . . .
I'm currently using jackson 2 1 4 and I'm having some trouble ignoring fields when I'm converting an object to a JSON string Here's my class which acts as the object to be converted: public class
- How to import a . cer certificate into a java keystore?
During the development of a Java webservice client I ran into a problem Authentication for the webservice is using a client certificate, a username and a password The client certificate I receive
- java - What is a NullPointerException, and how do I fix it? - Stack . . .
Since you have not yet said what to point to, Java sets it to null In the second line, the new keyword is used to instantiate (or create) an object of type Integer, and the reference variable num is assigned to that Integer object If you attempt to dereference num before creating the object you get a NullPointerException
- What are the -Xms and -Xmx parameters when starting JVM?
The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory For example, starting a JVM like below will start it with 256 MB of memory and will allow the process to use up to 2048 MB
- java - How do I find where JDK is installed on my windows machine . . .
I need to know where JDK is located on my machine On running Java -version in cmd, it shows the version as '1 6 xx' To find the location of this SDK on my machine I tried using echo %JAVA_HOME% b
- Setting JAVA_HOME environment variable in MS Windows
JAVA_HOME and PATH are different, I didn't say point JAVA_HOME to the jre bin directory Try making sure that the PATH environment variable includes the jre bin directory For example, type java from the command prompt, does that work?
- How to set the environment variables for Java in Windows
Step 5: Enter the Variable name as JAVA_HOME and the value to your jdk bin path ie c:\Programfiles\Java\jdk-1 6\bin and NOTE Make sure u start with ; in the Value so that it doesn't corrupt the other environment variables which is already set
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