1600173300
Sorting means to put all the elements in ascending order. The question that strikes our mind is that the first, what is the procedure involved in sorting through a process Selection Sort. Selection Sort is the process in which we repeatedly find the smallest element in the array from the unsorted subpart of the array.
The selection sort in java algorithm sorts the array by repeatedly finding a minimum item (considering the ascending order) from an unsorted part and putting it at the beginning of the array. The algorithm maintains two subarrays in the given array.
The subarray, which is already sorted.
The remaining subarray is unsorted and about to be sorted.
In every iteration of the selection sort, the minimum item (considering ascending order) from an unsorted subarray is picked and moved to a sorted subarray.
#java #selection sort
1600135200
OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.
In this article, we will be installing OpenJDK on Centos 8.
#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment
1622458860
As the name suggests, the merge sort program in JAVA is a sorting algorithm. It has been classically conceptualized as the divide and conquer algorithm in JAVA. The merge sort program in Java works by recursively breaking down an input array into two or more of its constituent sub-problems until these are simple enough to be solved directly.
The constituent sub-problems can either be similar or somewhat related to the parent problem. The individual solutions to each sub-problem are then combined to attain the solution to the original parent problem.
As iterated earlier, the merge sort program in JAVA is a divide and conquer algorithm. It is a stable sort which means that the array elements maintain their original positions relative to each other throughout the sorting process.
#full stack development #java #java program #merge sort #merge sort program in java #quicksort
1624456980
In this tutorial, we’ll take a look at how to sort a HashMap by key in Java.
Let’s go ahead and create a simple HashMap
:
Map<String, Integer> unsortedMap = new HashMap();
unsortedMap.put("John", 21);
unsortedMap.put("Maria", 34);
unsortedMap.put("Mark", 31);
unsortedMap.put("Sydney", 24);
unsortedMap.entrySet().forEach(System.out::println);
We’ve got String
s as keys, and Integer
s as values. Most of the time, you’ll encounter Integer
s or String
s as keys, and custom objects, String
s or Integer
s as values. We’ll want to sort this HashMap
, based on the String
keys.
HashMap
s don’t guarantee to maintain the order of its elements in any case. The order can change through time, and they most definitely won’t be printed back in the order of insertion:
John=21
Mark=31
Maria=34
Sydney=24
If you re-run this program, it’ll keep this order, since HashMap
s order their elements into bins, based on the hash value of the keys. When printing values from a HashMap
, its contents are printed sequentially, so the results will stay the same if we re-run the program multiple times.
#java #how to sort a hashmap by key in java #hashmap #key in java #sort #sort a hashmap by key in java
1623975000
Sorting data is a frequent problem in computer science. Given a collection of elements, the goal is to rearrange them in some order. Common examples are sorting an array alphabetically or from smallest to largest.
Sorted data is a lot easier to manipulate. Finding the largest or smallest element of an array can be done in constant time if the array is sorted. Searching for an element is a lot faster using algorithms such as Binary Search which rely on the assumption that the array is already sorted.
One of the simplest algorithms for sorting data is Selection Sort. It’s usually taught in beginner programming classes and tutorials to explain the concept of sorting, so we’ll keep this article very beginner-friendly.
#java #selection sort in java #selection sort
1600173300
Sorting means to put all the elements in ascending order. The question that strikes our mind is that the first, what is the procedure involved in sorting through a process Selection Sort. Selection Sort is the process in which we repeatedly find the smallest element in the array from the unsorted subpart of the array.
The selection sort in java algorithm sorts the array by repeatedly finding a minimum item (considering the ascending order) from an unsorted part and putting it at the beginning of the array. The algorithm maintains two subarrays in the given array.
The subarray, which is already sorted.
The remaining subarray is unsorted and about to be sorted.
In every iteration of the selection sort, the minimum item (considering ascending order) from an unsorted subarray is picked and moved to a sorted subarray.
#java #selection sort