The % operator returns the remainder after dividing the first number by the second number. If the second number (in your example size) is zero, then you will get a divide by zero ArithmeticException. The key is to check if size is zero before performing this loop, and take the appropriate action.
The % operator returns the remainder after dividing the first number by the second number. If the second number (in your example size) is zero, then you will get a divide by zero ArithmeticException. The key is to check if size is zero before performing this loop, and take the appropriate action.
Very simple question but I can’t do it. I have 3 classes: DrawCircle class DrawFrame class CircMain class One class creates a frame, the other draws a circle and fills it with smaller circles. In DrawFrame I set width and height. In DrawCircle I need to access the width and height of DrawFrame. How do … Read more
On your Eclipse IDE, go into Window > Preferences > Java > Installed JREs > and check your installed JREs. You should have an entry with a JDK there. Select the Execution Env as show below. Click OK Then Right-Click on your Project -> Maven -> Update Project Additionally, you may have to change Maven … Read more
You can look at the javadoc of the Pattern class: http://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html You need to escape any char listed there if you want the regular char and not the special meaning. As a maybe simpler solution, you can put the template between \Q and \E – everything between them is considered as escaped
Thanks to user phew for the help/ideas. I missed the obvious command line instructions on Xerial’s site for the Sample program. To get the program to run from the command line, I had to copy the JAR file into the same folder as the .CLASS file. Then run the following command: Inside the quotation marks … Read more
I am creating a bank account program for my java class that is suppose to manage up to 5 different bank accounts. The program has to allow the creation of a new account, which I have done, allow deposit and withdraw, which is also done, the 2 parts I cannot get to work are 1: … Read more
Since strings are immutable, both versions are safe. The latter, however, is less efficient (it creates an extra object and in some cases copies the character data). With this in mind, the first version should be preferred.
You need to escape the backslashes used in your path.
int is a primitive, null is not a value that it can take on. You could change the method return type to return java.lang.Integer and then you can return null, and existing code that returns int will get autoboxed. Nulls are assigned only to reference types, it means the reference doesn’t point to anything. Primitives are not reference … Read more