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Last Updated: Mar 27, 2024
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String getBytes() in Java

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Prerita Agarwal
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23 Jul, 2024 @ 01:30 PM

Introduction

In Java, the String is a Class and not a data type like 'int & char'. Thus, the String class represents String characters, and all string objects in Java are instances of this type. The string class is the most useful in Java programming and Selenium WebDriver. 

Java String class provides a lot of methods to perform operations on strings such as compare(), concat(), equals(), split(), length(), replace(), compareTo(), intern(), substring() etc. In this blog, we will learn about the String getBytes() Method in Java with the help of a few examples.

getBytes() Method

The getBytes() method of the Java String class encodes a string into a sequence of bytes and stores it in an array of bytes.

Syntax

The getBytes() function has three variations. The string getBytes() method's signature or syntax is as follows:

string.getBytes()
string.getBytes(Charset charset)
string.getBytes(String charsetName)

Note: String is an object of the String class in this case, and the function getBytes() returns a byte array.

Parameters

charset / charsetName - The name of a charset supported by the method.

Return

Byte sequence is returned as a value

Exception Throws

UnsupportedEncodingException: This exception is thrown when the function does not support the specified charset.

Internal implementation

public byte[] getBytes() {    
        return StringCoding.encode(value, 0, value.length);    
    }    
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getBytes() Method Examples

Example Code - 1

public class StringGetCharsExample{  
public static void main(String args[]){  
 String str = new String("hello Ninja, hope you are doing okay");  
      char[] ch = new char[10];  
      try{  
         str.getChars(6, 16, ch, 0);  
         System.out.println(ch);  
      }catch(Exception ex){System.out.println(ex);}  
}}  

Output

Ninja, hop

 

Example Code - 2

import java.util.Arrays;
class Main {
  public static void main(String[] args) {


    String str = "Coding Ninjas Studio";
    byte[] byteArray;


    // convert the string to a byte array
    // using platform's default charset
    byteArray = str.getBytes();
    System.out.println(Arrays.toString(byteArray));
  }
}

Output

[67, 111, 100, 101, 83, 116, 117, 100, 105, 111]


Related Article: String Args in Java

Frequently Asked Questions

Is String Thread-Safe? How?

Because strings are immutable, they are thread-safe. Because immutability assures that its instances will not be modified across different threads, any class that is immutable inherently qualifies for thread safety.

For example, if a thread modifies the value of a string, a new String is generated rather than altering the current one.

What Is the String Constant Pool?

The String constant pool, sometimes known as the String intern pool, is a specific memory location where the JVM saves String instances.

What is the difference between Length and capacity in Java StringBuffer?

The capacity of a StringBuffer object is the total amount of characters it can contain. On the other hand, Length is the number of characters already contained in the StringBuffer object.

Conclusion

In this article, we have extensively discussed the String getBytes() Method in Java Programming. We have also discussed its syntax, parameters as well as the return type with the help of an example. We hope this blog has helped you enhance your knowledge regarding string methods in Java Programming. Some official documentation on big data that can help you improve your understanding is String isEmpty().

Also check out - String Interview Questions In Java
 

Recommended problems -

If you would like to learn more, check out our articles on String contains(), and String format(). Practice makes a man perfect. To practice and improve yourself in the interview, you can check out Top 100 SQL problemsInterview experienceCoding interview questions, and the Ultimate guide path for interviews. Do upvote our blog to help other ninjas grow. Happy Coding!

Topics covered
1.
Introduction
2.
getBytes() Method
2.1.
Syntax
2.2.
Parameters
2.3.
Return
2.4.
Exception Throws
2.5.
Internal implementation
3.
getBytes() Method Examples
3.1.
Example Code - 1
3.1.1.
Output
3.2.
Example Code - 2
3.2.1.
Output
4.
Frequently Asked Questions
4.1.
Is String Thread-Safe? How?
4.2.
What Is the String Constant Pool?
4.3.
What is the difference between Length and capacity in Java StringBuffer?
5.
Conclusion