Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 7 years ago.Improve this question I am experiencing an error while trying to compile Java programs. I am on Windows (this is a Windows-specific problem) and I have the … Read more
Instance variable is the variable declared inside a class, but outside a method: something like: Now this IronMan Class can be instantiated in another class to use these variables. Something like: This is how we use the instance variables. Shameless plug: This example was pulled from this free e-book here here.
The first solution is to use the java.util.Random class: Another solution is using Math.random(): or
There are multiple ways: String.valueOf(number) (my preference) “” + number (I don’t know how the compiler handles it, perhaps it is as efficient as the above) Integer.toString(number)
In a thread on comp.lang.java.help, Hunter Gratzner gives some arguments against the presence of a Pair construct in Java. The main argument is that a class Pair doesn’t convey any semantics about the relationship between the two values (how do you know what “first” and “second” mean ?). A better practice is to write a very simple class, like the one … Read more
Unfortunately – it could be many things – and lots of app servers and other java ‘wrappers’ are prone to play with properties and their ‘own’ take on keychains and what not. So it may be looking at something totally different. Short of truss-ing – I’d try: to see if that helps. Instead of ‘all’ … Read more
Unfortunately – it could be many things – and lots of app servers and other java ‘wrappers’ are prone to play with properties and their ‘own’ take on keychains and what not. So it may be looking at something totally different. Short of truss-ing – I’d try: to see if that helps. Instead of ‘all’ … Read more
If you have 5 to 10 minutes, I generally recommend people to read this Integration with Apache Camel by Jonathan Anstey. It’s a well written piece which gives a brief introduction to and overview of some of Camel’s concepts, and it implements a use case with code samples. In it, Jonathan writes: Apache Camel is an open … Read more
4018 When you declare a reference variable (i.e., an object), you are really creating a pointer to an object. Consider the following code where you declare a variable of primitive type int: In this example, the variable x is an int and Java will initialize it to 0 for you. When you assign the value … Read more
From the Object.toString docs: Returns a string representation of the object. In general, the toString method returns a string that “textually represents” this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method. The toString method for class Object returns a string consisting of the name … Read more