In Java, strings are objects that are backed internally by a char array. So to convert a string to a byte array, we need a getByte() method. It is the easiest way to convert a string to a byte array. This method converts the given string to a sequence of bytes using the platform’s default charset and returns an array of bytes. It is a predefined function of string class. But it is an error-prone method and can return an erroneous result if the platform character encoding doesn’t match with the expected encoding.
Syntax:
public byte[] getBytes()
Note:
- In this method, the platform’s default encoding is used to convert the given string to the byte array if you do not specify any character encoding in the method.
- The length of the byte array is not the same as the given string, it depends upon the character encoding.
Example 1:
Java
// Java program to illustrate how to// convert a string to byte array// Using getBytes() import java.io.*; class GFG { public static void main(String[] args) { // Initializing String String ss = "Hello Lazyroar"; // Display the string before conversion System.out.println("String: " + ss); // Converting string to byte array // Using getBytes() method byte[] res = ss.getBytes(); System.out.println("Byte Array:"); // Display the string after conversion for (int i = 0; i < res.length; i++) { System.out.print(res[i]); } }} |
Output
String: Hello Lazyroar Byte Array: 72101108108111327110110110711510211111471101101107115
Example 2:
Java
// Java program to illustrate how to// convert a string to byte array// Using getBytes() import java.io.*;import java.util.Arrays; class GFG { public static void main(String[] args) { // Initializing String String ss = "Lazyroar"; // Display the string before conversion System.out.println("String: " + ss); // Converting string to byte array // Using getBytes() method byte[] res = ss.getBytes(); // Display the string after conversion System.out.println("Byte Array:" + Arrays.toString(res)); }} |
Output
String: Lazyroar Byte Array:[71, 101, 101, 107, 115, 102, 111, 114, 71, 101, 101, 107, 115]
