The arguments and result can be of different types. Many programming languages that use C-like syntax feature a ternary operator, ?: , which defines a conditional expression. 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:

An interesting fact is that Java also uses the & and | as logic operands (they are overloaded, with int types they are the expected bitwise operations) to evaluate all the terms in the expression, which is also useful when you need the side-effects.

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).

2021年7月16日 · n%10 means modulus of 10. This is used to get last digit. Let's say your number is 12345 12345 % 10 means remainder when 12345 is divided by 10, which gives you 5. Thereafter when you perform (n/10) you get 1234 (all the numbers except the least significant digit that you got in previous step).

2010年5月3日 · And what is even more important: you stop executing right when it happens to prevent any further code to work with wrong values and potentially cause damage to whatever it controls. Java Exceptions are a similar concept, but they fail to verify everything. If you want even more checks (at the cost of execution speed) you need to use assertions.

2021年8月10日 · In Java, I use the "_" as a prefix to a private class-wide non-static variable or fields and "$" as a prefix to a private class-wide static variable. It's better than using the "m" prefix because it does not block the line of reading.

2016年12月4日 · If you don`t want to create a manifest just to run the jar file, you can reference the main-class directly from the command line when you run the jar file. java -jar Predit.jar -classpath your.package.name.Test This sets the which main-class to run in the jar file.

2012年9月26日 · I am having problems converting this formula V = 4/3 π r^3. I used Math.PI and Math.pow, but I get this error: ';' expected Also, the diameter variable doesn't work ...

2021年8月16日 · 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 pathname must use forward slashes, /, in place of backslashes.

2019年2月19日 · Is there any other way in Java to calculate a power of an integer? I use Math.pow(a, b) now, but it returns a double, and that is usually a lot of work, and looks less clean when you just want to ...