Difference between Java implementation and UML specification wrt interfaces and abstract classes?

Various similar-looking questions exist but I could find none that responds to my query.The possibility of having th...

Calculate number of columns and rows needed depending on space available?

I need to distribute "n" amount of images in a given container. It should optimize the space depending if the contai...

What is inverse function to XOR??

There is XOR function in Java - a^b For exemple: 5^3 = 6 Can you tell me inverse function? If I have 6 and 3 can i...

How to make drawn images transparent in Java?

I got the animation to work in my Snake Clone Game. But the problem based on the picture is that the images do not h...

How do I break out of nested loops in Java??

I've got a nested loop construct like this: for (Type type : types) { for (Type t : types2) { if (some...

How to get first and last element in an array in java??

If I have an array of doubles: [10.2, 20, 11.1, 21, 31, 12, 22.5, 32, 42, 13.6, 23, 32, 43.3, 53, 14, 24, 34, 44, ...

Time complexity of Java's substring()?

What is the time complexity of the String#substring() method in Java? ...

Invoking a static method using reflection?

I want to invoke the main method which is static. I got the object of type Class, but I am not able to create an ins...

What does .pack() do??

I am learning about JPanel and GridLayout , this snippet of code will produce a simple JPanel with 6 buttons packa...

What does .pack() do??

I am learning about JPanel and GridLayout , this snippet of code will produce a simple JPanel with 6 buttons packa...

Initial size for the ArrayList?

You can set the initial size for an ArrayList by doing ArrayList<Integer> arr=new ArrayList<Integer>(10...

How to convert BigDecimal to Double in Java??

How we convert BigDecimal into Double in java? I have a requirement where we have to use Double as argument but we a...

Java: Superimpose/overlay animated gif on other animated gif?

I'm making a small game. It's not an action one, but a puzzle one, so performance is not quite as important. Now, I ...

can we make multi color gradient in xml for android background??

I have been trying to make a multi-color background in XML but there only 3 option available start, center, end and ...