Jun 25, 2015 · Option 1: Java System Properties (VM Arguments) It's important that the -D parameters are before your application.jar otherwise they are not recognized. java -jar -Dspring.profiles.active=prod application.jar Option 2: Program arguments java -jar application.jar --spring.profiles.active=prod --spring.config.location=c:\config

Can you explain to me the output of this Java code? int a=5,i; i=++a + ++a + a++; i=a++ + ++a + ++a; a=++a + ++a + a++; System.out.println(a); System.out.println(i ...

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).

Aug 5, 2015 · 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.

Dec 10, 2011 · 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();

All the answers here are great but, just to illustrate where this comes from, for questions like this it's good to go to the source: the Java Language Specification. Section 15:23, Conditional-And operator (&&) , says:

Jul 16, 2021 · What's the syntax for mod in java. 113. Understanding The Modulus Operator % Related. 3.

Nov 22, 2019 · 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:

Sep 20, 2017 · These are escape characters which are used to manipulate string. \t Insert a tab in the text at this point. \b Insert a backspace in the text at this point. \n Insert a newline in the text at this point. \r Insert a carriage return in the text at this …

Jan 2, 2010 · 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