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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 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 does the ^ operator do in Java? - Stack Overflow 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
java - Extracting . jar file with command line - Stack Overflow Java has a class specifically for zip files and one even more specifically for Jar Files java util jar JarOutputStream java util jar JarInputStream using those you could, on a command from the console, using a scanner set to system in Scanner console = new Scanner(System in); String input = console nextLine(); then get all the components and write them as a file JarEntry JE = null; while((JE
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
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 - What is a classpath and how do I set it? - Stack Overflow I was just reading this line: The first thing the format() method does is load a Velocity template from the classpath named output vm Please explain what was meant by classpath in this context, a