Efficient swapping of elements of an array in Java
Efficient swapping of elements of an array in Java
algorithm
Java, Shifting Elements in an Array
Assuming your array is {10,20,30,40,50,60,70,80,90,100} What your loop does is: Iteration 1: array[1] = array[0]; {10,10,30,40,50,60,70,80,90,100} Iteration 2: array[2] = array[1]; {10,10,10,40,50,60,70,80,90,100} What you should be doing is Object temp = pool[position]; for (int i = (position – 1); i >= 0; i–) { array[i+1] = array[i]; } array[0] = temp;
Creating a maze solving algorithm in Java
You probably should module your program – as I can understand it, you are reading the maze from file and trying to solve it at the same time. A better approach will be to split the program into 2 distinct parts: read the input file and create a matrix with all the data solve the maze from … Read more
What is the difference between an Abstract Data Type(ADT) and a Data Structure?
This may help: To put it simple, ADT is a logical description and data structure is concrete. ADT is the logical picture of the data and the operations to manipulate the component elements of the data. Data structure is the actual representation of the data during the implementation and the algorithms to manipulate the data … Read more
Big Oh for (n log n)
Big Oh for (n log n)
How to implement a most-recently-used cache
Java Collections provide LinkedHashMap out of the box, which is well-suited to building caches. You probably don’t have this in Java ME, but you can grab the source code here: http://kickjava.com/src/java/util/LinkedHashMap.java.htm If you can’t just copy-paste it, looking at it should get you started implementing one for inclusion in your mobile app. The basic idea … Read more
