Aishwarya Naglot has Published 180 Articles

How to delete a string inside a file(.txt) in java?

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:59:21

7K+ Views

In this article, we will learn how to delete a string inside a file (.txt) in Java. The following are the ways to do so: Using FileOutputStream and replaceAll() method. Using replace() method. Using FileOutputStream The FileOutputStream is a class ... Read More

Java program to delete all the files in a directory recursively (only files)

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:56:02

2K+ Views

To delete all the files in a directory recursively (only files), we can use the class Files, which is part of the java.nio.file package. The Files class helps in performing file operations such as creating, deleting, and copying files. Suppose we have a directory named test with the following structure: ... Read More

Redirecting System.out.println() output to a file in Java

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:54:55

9K+ Views

In Java, the System is a class that provides access to the resources called "System resources". It is a final class, which means it cannot be inherited by any other class. It is a part of the java.lang package. The System.out.println() method prints the data on the console. In this ... Read More

Java program to check for prime and find next Prime in Java

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:54:06

6K+ Views

In this article, let's learn how to check for a prime and find the next prime number in Java. Following are the different ways to do so: Using the isPrime() method. Using the nextPrime() method. Manual checking for prime and next prime. Using the isProbablePrime() method The isProbablePrime() ... Read More

How can we format a date using the Jackson library in Java?

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:36:31

3K+ Views

Jackson is a Java-based library, and it can be useful to convert Java objects to JSON and JSON to Java objects. A Jackson API is faster than other API, needs less memory, and is good for large objects. We can format a date using the setDateFormat() of ObjectMapper class. This ... Read More

Convert POJO to XML using the Jackson library in Java?

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:35:36

7K+ Views

Jackson is a library that allows you to convert Java objects into XML and vice versa. In this example, we will demonstrate how to convert a POJO (Plain Old Java Object) into XML using the Jackson library. Well, if you are not familiar with POJO, it is a simple ... Read More

How to serialize the order of properties using the Jackson library in Java?

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:33:44

4K+ Views

In this article, let's learn about the serialization of the order of properties using the Jackson library in Java. The Jackson library is used for processing JSON data in Java. The @JsonPropertyOrder is an annotation to be used at the class level. It takes as property a list of fields ... Read More

How can we ignore the fields during JSON serialization in Java?

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:31:48

14K+ Views

If there are fields in Java objects that do not wish to be serialized, we can use the @JsonIgnore annotation in the Jackson library. The @JsonIgnore can be used at the field level, for ignoring fields during the serialization and deserialization. In this article, we will learn how to ignore ... Read More

Differences between Method Reference and Constructor Reference in Java?

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:30:13

3K+ Views

The Method Reference and Constructor Reference are part of Java 8's functional programming features, they used for refering to methods and constructors without executing them. They are often used in conjunction with functional interfaces, such as those defined in the java.util.function package. Method Reference A method reference is a shorthand ... Read More

Java Program to Sort a Map By Values

Aishwarya Naglot

Aishwarya Naglot

Updated on 01-Sep-2025 13:28:52

492 Views

Java HashMap is a hash table-based implementation of Java's Map interface. It is a collection of key-value pairs.In this article, we will learn to sort a map by values in Java. Following are the ways to sort a map by values in Java: Using Comparator Using Streams Using ... Read More

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