JAVA Tutorials

Multitasking – The objective of multitasking is to execute multiple tasks simultaneously to reduce CPU response time and make program execution faster and improve overall system performance. In Java we have multi processing and multi threading. It can be achieved in two ways: 1) Process-based Multitasking (multi-processing) In multi-processing, each task that is being concurrently executed …

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LinkedHashMap LinkedHashMap is the child class of HashMap. It is exactly same as HashMap (including methods and constructors) except the following   differences: LinkedHashSet and LinkedHashMap are commonly used for developing cache based applications. Let us take a programming example of LinkedHashMap : import java.util.*; class LinkedHashDemo { public static void main(String args[]) { LinkedHashMap lh …

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For predefined comparable classes (String) default natural sorting order already available. If we are not satisfied with that default natural sorting order, then we can define our own sorting by using Comparator Interface. For predefined non comparable classes StringBuffer default natural sorting order not already available, we can define our own sorting technique by using …

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Let us take some programming examples based on String objects in TreeSet concept : Example1 : Write a JAVA Program to insert String Objects into a TreeSet where all elements should be inserted according to reverse of alphabetical order. import java.util.*; class myComp implements Comparator // Our custom comparator class { public int compare(Object obj1, Object …

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