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Java - String getBytes() Method



The Java string getBytes() method is used to encode this String into a sequence of bytes using the given charset (or platform's default charset), storing the result into a new byte array.

Syntax

public byte[] getBytes()
public byte[] getBytes(Charset charset)
public byte[] getBytes(String charsetName) 
                throws UnsupportedEncodingException                         

Parameters

charset Specify the Charset to be used to encode the String.
charsetName Specify the name of a supported charset.

Return Value

Returns the resultant byte array.

Exception

throws UnsupportedEncodingException, If the named charset is not supported.

Example:

In the example below, getBytes() method is used to encode the given String into a sequence of bytes using the platform's default charset.

public class MyClass {
  public static void main(String[] args) {
    String MyString = "HELLO";
    
    //encoding the string into a byte array
    byte Arr[] = MyString.getBytes();

    //printing the content of byte array
    System.out.print("Default Charset encoding:");
    for(byte i: Arr)
      System.out.print(" " + i);
  }
}

The output of the above code will be:

Default Charset encoding: 72 69 76 76 79

Example:

In this example, the given String is encoded into a sequence of bytes using the given charset.

import java.nio.charset.Charset; 

public class MyClass {
  public static void main(String[] args) {
    String MyString = "HELLO";
    
    //encoding the string into a byte array
    Charset cs = Charset.forName("UTF-16");
    byte Arr[] = MyString.getBytes(cs);

    //printing the content of byte array
    System.out.print("UTF-16 Charset encoding:");
    for(byte i: Arr)
      System.out.print(" " + i);
  }
}

The output of the above code will be:

UTF-16 Charset encoding: -2 -1 0 72 0 69 0 76 0 76 0 79

Example:

Here, the given String is encoded into a sequence of bytes using the given charset string.

import java.io.*;

public class MyClass {
  public static void main(String[] args) {
    String MyString = "HELLO";
    
    try{ 
      //encoding the string into a byte array
      String cs = "UTF-16BE";
      byte Arr[] = MyString.getBytes(cs);

      //printing the content of byte array
      System.out.print("UTF-16BE Charset encoding:");
      for(byte i: Arr)
        System.out.print(" " + i);
    }catch(UnsupportedEncodingException ex){
      System.out.println("Unsupported character set"+ex);
    }
  }
}

The output of the above code will be:

UTF-16BE Charset encoding: 0 72 0 69 0 76 0 76 0 79

❮ Java String Methods

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