A method stub in this sense is a method with no real substance, i.e. it’s not doing what it is intended to do. Your getUserNum() method should return a user’s unique ID, but instead you’re defining a stub that simply returns -1 on every invocation. You can tell from your main() method, you’re supposed to be defining these two methods: So, … Read more
You can use the jar tool bundled with the SDK and create an executable version of the program. This is how it’s done. I’m posting the results from my command prompt because it’s easier, but the same should apply when using JCreator. First create your program: Very simple, just displays a window with “Hello World” Then compile … Read more
density *= invertedRatio; is a shortened version of density = density * invertedRatio; This notation comes from C.
Overview of Scanner.hasNextXXX methods java.util.Scanner has many hasNextXXX methods that can be used to validate input. Here’s a brief overview of all of them: hasNext() – does it have any token at all? hasNextLine() – does it have another line of input? For Java primitives hasNextInt() – does it have a token that can be parsed into an int? Also available are hasNextDouble(), hasNextFloat(), hasNextByte(), hasNextShort(), hasNextLong(), and hasNextBoolean() As bonus, there’s … Read more
You can use the JArduino (Java-Arduino) library, which provides a Java API to control your Arduino using serial port (using a USB cable, or wireless devices behaving as serial ports from a software point of view), UDP (via an ethernet shield). All the code related to communication between Java and Arduino is managed internally by … Read more
Scanner is used for parsing tokens from the contents of the stream while BufferedReader just reads the stream and does not do any special parsing. In fact you can pass a BufferedReader to a scanner as the source of characters to parse.
There are a couple of ways to accomplish this using the Arrays utility class. If the array is not sorted and is not an array of primitives: If the array is primitives and not sorted, one should use a solution offered by one of the other answers such as Kerem Baydoğan’s, Andrew McKinlay’s or Mishax’s. The above code will compile even if theArray is primitive (possibly emitting … Read more
This question already has answers here:Closed 9 years ago. Possible Duplicate:Arrays constants can only be used in initializers error I was studying arrays, and I came through this short-cut method of declaring and initializing an array in one line. For example, But when I tried to do following code, I got this compiler error saying “Array … Read more
I assume Nodecollection is a com.aspose.words.NodeCollection. If you want to use the foreach syntax you better do:
With your example: