In this post under Java Collections, I will show with example how to convert a collection to Enumeration. Below is the complete code for your reference. Main class 1 package core.collection; 2 3 import java.util.Collections; 4 import java.util.Enumeration; 5 import java.util.List; 6 import java.util.ArrayList; 7 8 public class ColToEnumDemo { 9 public static void main(String…… Continue reading Collection to Enumeration conversion
Category: Collections
Copying elements from one list to another list
In this post under Java Collections, I will show with example how to copy elements from one list to another. Below is the complete code for your reference. Main class 1 package core.collection; 2 3 import java.util.ArrayList; 4 import java.util.Collections; 5 import java.util.List; 6 7 public class ListCopyDemo { 8 public static void main(String []…… Continue reading Copying elements from one list to another list
Comparing two arrays for equality
In this post under Java, I will show with example how to check whether two arrays are equal or not. The class Arrays under java.util package has “equals” static method which takes two arrays as arguments and compare their contents to check whether they are same. Below is the code showing an example Main 1…… Continue reading Comparing two arrays for equality
Sorting a section of an array
In this post I will explain how to sort a section of an array. The java Arrays class provides a static method named “sort” which takes the below three arguments 1) the array 2) fromIndex 3) toIndex This method sorts a section of the array. The section to be sorted is indicated by fromIndex (position…… Continue reading Sorting a section of an array
Sorting arrays using Comparator
This post explains how to sort arrays using comparator with an example. The java jdk provides Arrays class, which has a static method named “sort”. This method takes two arguments 1) the array to be sorted 2) Comparator which contains the logic to sort the array Below is the example which sort cards based on…… Continue reading Sorting arrays using Comparator
Different ways to convert list to array
This post explains two ways through which we can convert a list to array. First approach is simply calling toArrayList on list instance. This method returns an Object array, When converting to array it doesn’t consider the data type of the entries in the list. Below is the code snippet list.toArray(); The second approach involves…… Continue reading Different ways to convert list to array
Different ways to convert collection to an array
This post explains two ways through which we can convert a collection to an array. The collection can be a list or set. First approach is simply calling “toArray” on collection instance. This method returns an Object array, When converting to array it doesn’t consider the data type of the entries in the collection. Below…… Continue reading Different ways to convert collection to an array
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