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- 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 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
- What is the difference between == and equals () in Java?
0 In Java, == and the equals method are used for different purposes when comparing objects Here's a brief explanation of the difference between them along with examples: == Operator: The == operator is used for reference comparison It checks whether two references point to the exact same object in memory Example: String str1 = new String
- 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
- 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
- java - How to set the maximum memory usage for JVM? - Stack Overflow
I want to limit the maximum memory used by the JVM Note, this is not just the heap, I want to limit the total memory used by this process
- java - How to run a JAR file - Stack Overflow
11 If you don`t want to create a manifest just to run the jar file, you can reference the main-class directly from the command line when you run the jar file java -jar Predit jar -classpath your package name Test This sets the which main-class to run in the jar file
- java - What is the difference between JDK and JRE? - Stack Overflow
1439 The JRE is the Java Runtime Environment It is a package of everything necessary to run a compiled Java program, including the Java Virtual Machine (JVM), the Java Class Library, the java command, and other infrastructure However, it cannot be used to create new programs The JDK is the Java Development Kit, the full-featured SDK for Java
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