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What is the percent % operator in java? - Stack Overflow
n%10 means the modulus of 10, that is the remainder you get when you divide with 10. Here it is used to get each digit.
What is the Java ?: operator called and what does it do?
In particular, if Java ever gets another ternary operator, people who use the term "conditional operator" will still be correct and unambiguous - unlike those who just say "ternary operator". Yes, the phrase "ternary operator" has stuck - my answer is part of an effort to "unstick" it, just as I try to correct the claim that "objects are passed ...
What is the difference between == and equals () in Java?
Since java.lang.String class override equals method, It return true if two String object contains same content but == will only return true if two references are pointing to same object. Here is an example of comparing two Strings in Java for equality using == and equals() method which will clear some doubts:
What does the ^ operator do in Java? - Stack Overflow
Exponentiation in Java. As for integer exponentiation, unfortunately Java does not have such an operator. You can use double Math.pow(double, double) (casting the result to int if necessary). You can also use the traditional bit-shifting trick to compute some powers of two. That is, (1L << k) is two to the k-th power for k=0..63. See also
What are the -Xms and -Xmx parameters when starting JVM?
-Xss set java thread stack size -Xprof output cpu profiling data -Xfuture enable strictest checks, anticipating future default -Xrs reduce use of OS signals by Java/VM (see documentation) -Xcheck:jni perform additional checks for JNI functions -Xshare:off do not attempt to use shared class data -Xshare:auto use shared class data if ...
boolean operations - How to use 'or' in Java? - Stack Overflow
The || operator can only be used, in Java, where a boolean (true or false) expression is expected, such as in an if statement like the above. So pretty much in an if or a conditional operator (that ?...: thing, sometimes called the ternary operator).
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 && in Java?
In respect of the AND and OR operators, Java has got two types of evaluation namely Short-Circuit evaluation and full evaluation. && || Short-Circuit Evaluation. Short-Circuit evaluation enables you to not evaluate the right-hand side of AND and OR expressions, when the overall result can be predicted from the left-side value.
java - What is a Question Mark "?" and Colon - Stack Overflow
The Java jargon uses the expression method, not functions - in other contexts there is the distinction of function and procedure, dependent on the existence of a return type, which is required in a ternary expression.
Proper usage of Java -D command-line parameters
You're giving parameters to your program instead to Java. Use. java -Dtest="true" -jar myApplication.jar instead. Consider using "true".equalsIgnoreCase(System.getProperty("test")) to avoid the NPE. But do not use "Yoda conditions" always without thinking, sometimes throwing the NPE is the right behavior and sometimes something like
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