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
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
double colon) operator in Java 8 - Stack Overflow The double colon, i e , the :: operator, was introduced in Java 8 as a method reference A method reference is a form of lambda expression which is used to reference the existing method by its name
What is the difference between == and equals () in Java? 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:
and * in Java Comments - Stack Overflow The Java language only supports two types of comments A comment in the form of ** * is just a regular multiline comment, and the first character inside it happens to be an asterisk
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 - SSL and cert keystore - Stack Overflow SSL properties are set at the JVM level via system properties Meaning you can either set them when you run the program (java -D ) Or you can set them in code by doing System setProperty The specific keys you have to set are below: javax net ssl keyStore - Location of the Java keystore file containing an application process's own certificate and private key On Windows, the specified