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- What is the point of the diamond operator ( lt; gt;) in Java?
In any Java source file using generics the old non-generic types should be forbidden (you can always use <?> if interfacing to legacy code) and the useless diamond operator should not exist
- 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 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
- What does the arrow operator, - gt;, do in Java? - Stack Overflow
Details: Java 6, Apache Commons Collection, IntelliJ 12 Update Answer: It turns out that IntelliJ 12 supports Java 8, which supports lambdas, and is "folding" Predicates and displaying them as lambdas Below is the "un-folded" code
- 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
- What is the difference between == and equals () in Java?
Main difference between == and equals in Java is that "==" is used to compare primitives while equals() method is recommended to check equality of objects String comparison is a common scenario of using both == and equals() method
- How do the post increment (i++) and pre increment (++i) operators work . . .
How do the post increment (i++) and pre increment (++i) operators work in Java? Asked 16 years, 1 month ago Modified 1 year, 10 months ago Viewed 451k times
- 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
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