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Commitdc170a8

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---
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layout:post
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title:"How To Create UUID in Java?"
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author:gaurav
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image:assets/images/2020-12-23/create-uuid-in-java.png
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categories:[ Java, Core Java, String]
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description:In this article you will see, how to create UUID in Java.
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---
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##Introduction
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UUID, a universally unique identifier is a 128-bit number used to identify information in computer systems.
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UUID is made of hex digits along with 4 hyphen ("-") symbols. The length of a UUID is 36 characters.
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There are 5 types of UUID but mostly version 4 i.e. Randomly Generated UUID is used.
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We are going to create the version 4 UUID here.
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###Example UUID
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df6fdea1-10c3-474c-ae62-e63def80de0b
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##How to create UUID in Java?
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Creating a Randomly Generated UUID (version 4) is really easy in Java.
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UUID Class is present in`java.util` package. And it has the static method`randomUUID()` which returns the randomly generated UUID.
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The example is given below.
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```java
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importjava.util.UUID;
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/**
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* A Java program to create a Randomly Generated UUID i.e. Version 4 UUID
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*@author Gaurav Kukade at coderolls.com
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*
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*/
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publicclassCreateUUID {
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publicstaticvoidmain(String[]args) {
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// creating random uuid i.e. version 4 UUID
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UUID uuid=UUID.randomUUID();
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System.out.println("Printing the randomly generated UUID value......\n");
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System.out.println("uuid:"+uuid);
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}
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}
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```
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Output
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```java
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Printing the randomly generatedUUID value......
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uuid: e3aed661-ccc2-42fd-ad69-734fee350cd2
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```
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Get the[above code as GitHub Gist](https://gist.github.com/gauravkukade/395f314c549969bd300d72c7e032dbcb).
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--------
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You can visit my[YouTube channel 'coderolls'](https://www.youtube.com/channel/UCl31HHUdQbSHOQfc9L-wo3w?view_as=subscriber?sub_confirmation=1) to find more video tutorials.
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If you found this article worth, support me by[giving a cup of Coffee ☕](https://www.paypal.me/GauravKukade)
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####Related Articles
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-[Learn About Java String Pool And intern() Method](https://coderolls.com/java-string-pool-and-intern-method/)
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-[How Do I Compare Strings In Java](https://coderolls.com/compare-strings-in-java/)
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-[How To Reverse A String In Java (5 ways)](https://coderolls.com/reverse-a-string-in-java/)
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-[Compare Two Strings Lexicographically In Java](https://coderolls.com/compare-two-strings-lexicographically-in-java/)
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-[Difference Between StringBuffer and StringBuilder class](https://coderolls.com/difference-between-stringbuffer-and-stringbuilder/)
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-[8 Basic GIT Commands Every Newbie Developer Must Know](https://coderolls.com/basic-git-commands/)
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---
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layout:post
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title:"How To Convert StringBuilder To String In Java?"
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author:gaurav
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image:assets/images/2020-12-25/convert-stringbuilder-to-string-in-java.png
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categories:[ Java, Core Java, String]
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description:In this article you will see, how to convert a StringBuilder to String in Java.
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featured:false
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---
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##Introduction
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Java`StringBuilder` is non-synchronized update of the`StringBuffer` class.
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Sometimes there is need to convert the`StringBuilder` object to the`String`. We can do it easily by smply invoking the`toString()` method.
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Let see the example program below.
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##Java Program to convert`StringBuilder` to`String`
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```java
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/**
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* A Java program to convert StringBuilder to String
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*@author Gaurav Kukade at cderlls.com
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*
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*/
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publicclassStringBuilderToString {
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publicstaticvoidmain(String[]args) {
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StringBuilder stringBuilder=newStringBuilder("Hello");
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stringBuilder.append("Gaurav")
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.append("Kukade!");
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System.out.println("Printing strinBuilder as String:\n");
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System.out.println(stringBuilder.toString());
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}
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}
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```
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Output:
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```java
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Printing strinBuilder asString:
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HelloGauravKukade!
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```
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Get the[above code as GitHub Gist](https://gist.github.com/gauravkukade/00bd416bcb2ca1c72dbcd600d48e2f78).
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---------
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You can visit my[YouTube channel 'coderolls'](https://www.youtube.com/channel/UCl31HHUdQbSHOQfc9L-wo3w?view_as=subscriber?sub_confirmation=1) to find more video tutorials.
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If you found this article worth, support me by[giving a cup of Coffee ☕](https://www.paypal.me/GauravKukade)
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####Related Articles
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-[Learn About Java String Pool And intern() Method](https://coderolls.com/java-string-pool-and-intern-method/)
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-[How Do I Compare Strings In Java](https://coderolls.com/compare-strings-in-java/)
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-[How To Reverse A String In Java (5 ways)](https://coderolls.com/reverse-a-string-in-java/)
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-[Compare Two Strings Lexicographically In Java](https://coderolls.com/compare-two-strings-lexicographically-in-java/)
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-[Difference Between StringBuffer and StringBuilder class](https://coderolls.com/difference-between-stringbuffer-and-stringbuilder/)
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-[8 Basic GIT Commands Every Newbie Developer Must Know](https://coder
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