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Sometimes, we need to convert String to byte array. We can use getBytes() method of String to do it,
When you run above program, you will get below output:
Method syntax:
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public byte[] getBytes() |
String getBytes Example:
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package org.arpit.java2blog; public class StringBytesExample { public static void main(String[] args) { String str1 = "java2blog"; byte[] bytes=str1.getBytes(); System.out.println(str1.length()); System.out.println(bytes.length); System.out.println(bytes.toString()); } } |
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9 9 [B@e1641c0 |
There is one more overloaded method for getBytes
Method syntax:
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public byte[] getBytes(String charSetName) |
It encodes String to specified charset format. You can read about charset from http://docs.oracle.com/javase/7/docs/api/java/nio/charset/Charset.html
Lets encode above String in charSet UTF-16LE and UTF-16BE
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package org.arpit.java2blog; import java.io.UnsupportedEncodingException; import java.nio.charset.Charset; public class StringBytesExample { public static void main(String[] args) { String str1 = "java2blog"; byte[] bytesDef=str1.getBytes(); byte[] bytesUTFLE = null; byte[] bytesUTFBE = null; try { bytesUTFLE = str1.getBytes("UTF-16LE"); bytesUTFBE=str1.getBytes("UTF-16BE"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } System.out.println("Encoding using default charSet"); for (int i = 0; i < bytesDef.length; i++) { System.out.print(bytesDef[i]); } System.out.println("n----------------------------------"); System.out.println("nEncoding using UTF-16LE charset"); for (int i = 0; i < bytesUTFLE.length; i++) { System.out.print(bytesUTFLE[i]); } System.out.println("n----------------------------------"); System.out.println("nEncoding using UTF-16BE charset"); for (int i = 0; i < bytesUTFBE.length; i++) { System.out.print(bytesUTFBE[i]); } } } |
When you run above program, you will get below output:
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Encoding using default charSet 10697118975098108111103 ---------------------------------- Encoding using UTF-16LE charset 10609701180970500980108011101030 ---------------------------------- Encoding using UTF-16BE charset 01060970118097050098010801110103 |
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