Core java

04 May

How HashMap works in java

Most common interview questions are <code>How HashMap works in java</code>, “How get and put method of HashMap work internally”. Here I am trying to explain internal functionality with an easy example. [crayon-6043232be1466100502890-i/]  is one of the most used Collections in java.Rather than going through theory, we will start with example first, so that you will […]

19 January

How to escape double quotes in String in java

In this post, we will see how to escape double quotes in String in java. There are scenarios where you need to escape double quotes already present in the String. This generally happens while dealing with JSON file format or reading file data. Escape double quotes in java Double quotes characters can be escaped with […]

12 January

Java Date to LocalDate

In this post, we will see how to convert Date to LocalDate in java. Sometimes, we may need to convert Date to new Java 8 APIs and vice versa. There are multiple ways to convert Date to LocalDate in java. Read also: Convert LocalDate to Date in java Using toInstant() method of Date class You […]

11 January

Java LocalDate to Date

In this post, we will see how to convert LocalDate to Date. Java 8 has introduced a lot of new APIs for Date and time. There can be many ways to convert Java LocalDateTime to date. Using Instant object You can convert LocalDate to Date using Instant object which we can from Zone. Here is […]

04 January

How to change java version in intellij

Learn about how to change java version in intellij.

03 January

Generate SerialVersionUID in Intellij

Learn about how to generate SerialVersionUID in Intellij using different ways.

02 January

System.out.println shortcut in intellij

Learn about System.out.println shortcut in intellij.

02 January

System.out.println shortcut in eclipse

Learn about System.out.println shortcut in eclipse.

31 December

Java Stream to List

In this post, we will see how to convert Stream to List in java. There are multiple ways to convert Stream to List in java. Using Collectors.toList() You can pass Collectors.toList() to Stream.collect() method to convert Stream to List in java. Stream’s collect method performs mutable reduction operation on elements of Stream and Collectors.toList() provides […]

30 December

[Solved] Class names are only accepted if annotation processing is explicitly requested

Learn about how to fix class names are only accepted if annotation processing is explicitly requested in java.