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  1. What is the Java ?: operator called and what does it do?

    It's a ternary operator (in that it has three operands) and it happens to be the only ternary operator in Java at the moment. However, the spec is pretty clear that its name is the conditional …

  2. What is the difference between & and && in Java? - Stack Overflow

    2011年4月9日 · I always thought that && operator in Java is used for verifying whether both its boolean operands are true, and the & operator is used to do Bit-wise operations …

  3. 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: …

  4. What are the -Xms and -Xmx parameters when starting JVM?

    2013年2月7日 · 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 …

  5. What does the arrow operator, '->', 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<Car>) …

  6. Setting JAVA_HOME - Stack Overflow

    JAVA_HOME if you installed the JDK (Java Development Kit) or JRE_HOME if you installed the JRE (Java Runtime Environment). In the Variable Value field, enter your JDK or JRE …

  7. How can I use pointers in Java? - Stack Overflow

    2009年11月17日 · I know Java doesn't have pointers, but I heard that Java programs can be created with pointers and that this can be done by the few who are experts in Java. Is it true?

  8. java - && (AND) and || (OR) in IF statements - Stack Overflow

    Java has 5 different boolean compare operators: &, &&, |, ||, ^ & and && are "and" operators, | and || "or" operators, ^ is "xor" The single ones will check every parameter, regardless of the …

  9. Proper usage of Java -D command-line parameters

    When passing a -D parameter in Java, what is the proper way of writing the command-line and then accessing it from code? For example, I have tried writing something like this...

  10. Setting the default Java character encoding - Stack Overflow

    java -Dfile.encoding=UTF-8 … com.x.Main Charset.defaultCharset() will reflect changes to the file.encoding property, but most of the code in the core Java libraries that need to determine …