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- What are the -Xms and -Xmx parameters when starting JVM?
From Oracle's documentation: Note that the JVM uses more memory than just the heap For example Java methods, thread stacks and native handles are allocated in memory separate from the heap, as well as JVM internal data structures
- What does the ^ operator do in Java? - Stack Overflow
7 It is the Bitwise xor operator in java which results 1 for different value of bit (ie 1 ^ 0 = 1) and 0 for same value of bit (ie 0 ^ 0 = 0) when a number is written in binary form ex :- To use your example: The binary representation of 5 is 0101 The binary representation of 4 is 0100
- 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?
- What does the arrow operator, - gt;, do in Java? - Stack Overflow
While hunting through some code I came across the arrow operator, what exactly does it do? I thought Java did not have an arrow operator return (Collection lt;Car gt;) CollectionUtils select(list
- What is the Java ?: operator called and what does it do?
Not only in Java, this syntax is available within PHP, Objective-C too In the following link it gives the following explanation, which is quiet good to understand it: A ternary operator is some operation operating on 3 inputs It's a shortcut for an if-else statement, and is also known as a conditional operator In Perl PHP it works as:
- What is the difference between and in Java? - Stack Overflow
I always thought that amp; amp; operator in Java is used for verifying whether both its boolean operands are true, and the amp; operator is used to do Bit-wise operations on two integer types
- in java what does the @ symbol mean? - Stack Overflow
In Java Persistence API you use them to map a Java class with database tables For example @Table () Used to map the particular Java class to the date base table @Entity Represents that the class is an entity class Similarly you can use many annotations to map individual columns, generate ids, generate version, relationships etc
- 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
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