In this post under Java, I will introduce you with example to Java’s Record classes. Introduced in Java 16, is a immutable data class, whose main purpose is hold read only data. Below shows how to create Record class. Person Record package core.record;public record Person(int id, String name, int age) {} We save the file…… Continue reading Simple Java Record Example
Category: Java
Merging two character arrays
In this post under Java. I will show with example how to merge two character arrays into one. Below is the complete code for your reference. Main Class 1 package core.string; 2 3 public class Example1 { 4 public static void main(String[] args) { 5 char[] inputArray1 = {‘a’, ‘b’, ‘c’}; 6 char[] inputArray2 =…… Continue reading Merging two character arrays
Merging text files
In this post under Java I will with example how to merge two or more text files. Below is the complete code for your reference Main class 1 package io;2 3 import java.io.*;4 5 public class IOExample3 {6 private static int BYTES_TO_BE_READ = 1000;7 private char buffer[] = new char[BYTES_TO_BE_READ];8 9 public static void main(String[]…… Continue reading Merging text files
Creating text file of user specified size with random data
In this post under Java, I will show with example how to create a text file of user specified size with random data. Below is the complete code for you example Main class 1 package io;2 3 import java.io.BufferedWriter;4 import java.io.File;5 import java.io.FileWriter;6 import java.io.IOException;7 import java.util.Random;8 9 public class IOExample1 {10 private Random random;11…… Continue reading Creating text file of user specified size with random data
Uncompressing a gzip file
In this post under Java, I will show with example how to uncompress a gzip format file. For decompressing a gzip file, we will use java provided “GZIPInputStream” class. Below is the main code for your reference Main class 1 package zip; 2 3 import java.io.File; 4 import java.io.FileInputStream; 5 import java.io.FileOutputStream; 6 import java.io.IOException;…… Continue reading Uncompressing a gzip file
Compressing a file in gzip format
In this post under Java, I will show with example how to compress a single file in gzip format. For compressing a file in gzip format, we will use java provided “GZIPOutputStream” class. Below is the main code for your reference Main Class 1 package zip; 2 3 import java.io.File; 4 import java.io.FileInputStream; 5 import…… Continue reading Compressing a file in gzip format
Converting Date instance to Instant instance
In this post under DateTime, I will show how to convert an instance of “Date” class to “Instant” instance. Below is the code to that will do the conversion. Date date = new Date(); Instant instant = date.toInstant(); As shown in the above code snippet, first we create a “Date” instance and store in “date”…… Continue reading Converting Date instance to Instant instance
Converting Instant instance to Date instance
In this post under DateTime, I will show how to convert an instance of “Instant” class to “Date” instance. Below is the code to that will do the conversion. Instant instant = Instant.now(); Date date = Date.from(instant); “now” static method of “Instant” class will return an “Instant” instance representing the current date time. Then we…… Continue reading Converting Instant instance to Date instance
Serializing and De-Serializing Date object to and from a custom pattern
In this post under Java, I will show with example how to serialize and de-serialize Date object using a custom pattern. In the previous post, we used “SimpleDateFormat” class to serialize and de-serialize Date object using a pattern obtained based on system default locale. This pattern was figured out by Java and was not provided…… Continue reading Serializing and De-Serializing Date object to and from a custom pattern
Serializing and De-Serializing Date object to and from pattern
In this post, I will show with example how to serialize and deserialize Date object. Java provides “SimpleDateFormat” class to serialize and deserialize Date objects. Below is an example Main class 1 package datetime; 2 3 import java.text.ParseException; 4 import java.text.SimpleDateFormat; 5 import java.util.Date; 6 7 public class Example1 { 8 public static void main(String[]…… Continue reading Serializing and De-Serializing Date object to and from pattern
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