Le Classe de chaîne Java getBytes() La méthode effectue le codage de la chaîne dans la séquence d'octets et la conserve dans un tableau d'octets.
Signature
Il existe trois variantes de la méthode getBytes(). La signature ou la syntaxe de la méthode string getBytes() est donnée ci-dessous :
public byte[] getBytes() public byte[] getBytes(Charset charset) public byte[] getBytes(String charsetName)throws UnsupportedEncodingException
Paramètres
charset / charsetName - Le nom d'un jeu de caractères pris en charge par la méthode.
Retour
Séquence d'octets.
Lancements d'exceptions
Exception d'encodage non prise en charge : Il est lancé lorsque le jeu de caractères mentionné n'est pas pris en charge par la méthode.
Implémentation interne
public byte[] getBytes() { return StringCoding.encode(value, 0, value.length); } Classe de chaîne getBytes() Exemple de méthode
La méthode getBytes() sans paramètre code la chaîne en utilisant le jeu de caractères par défaut de la plateforme, qui est UTF - 8. Les deux exemples suivants montrent la même chose.
images de démarques
Nom de fichier: StringGetBytesExample.java
public class StringGetBytesExample{ public static void main(String args[]){ String s1='ABCDEFG'; byte[] barr=s1.getBytes(); for(int i=0;i <barr.length;i++){ system.out.println(barr[i]); } }} < pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> 65 66 67 68 69 70 71 </pre> <h2>Java String class getBytes() Method Example 2</h2> <p> <strong>FileName:</strong> StringGetBytesExample2.java</p> <p>The method returns a byte array that again can be passed to the String constructor to get String.</p> <pre> public class StringGetBytesExample2 { public static void main(String[] args) { String s1 = 'ABCDEFG'; byte[] barr = s1.getBytes(); for(int i=0;i <barr.length;i++){ system.out.println(barr[i]); } getting string back s2="new" string(barr); system.out.println(s2); < pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> 65 66 67 68 69 70 71 ABCDEFG </pre> <h2>Java String class getBytes() Method Example 3</h2> <p>The following example shows the encoding into a different charset.</p> <p> <strong>FileName:</strong> StringGetBytesExample3.java</p> <pre> // Import statement import java.io.*; public class StringGetBytesExample3 { // main method public static void main(String argvs[]) { // input string String str = 'Welcome to JavaTpoint.'; System.out.println('The input String is : '); System.out.println(str + '
'); // inside try block encoding is // being done using different charsets try { 16 - bit UCS Transformation format byte[] byteArr = str.getBytes('UTF-16'); System.out.println('After converted into UTF-16 the String is : '); for (int j = 0; j <bytearr.length; 16 j++) { system.out.print(bytearr[j]); } system.out.println('
'); big endian byte order, - bit ucs transformation format byte[] bytearr1="str.getBytes('UTF-16BE');" system.out.println('after converted into utf-16be the string is : '); for (int j="0;" < bytearr1.length; system.out.print(bytearr1[j]); iso latin alphabet bytearr2="str.getBytes('ISO-8859-1');" iso-8859-1 bytearr2.length; system.out.print(bytearr2[j]); little bytearr3="str.getBytes('UTF-16LE');" utf-16le bytearr3.length; system.out.print(bytearr3[j]); catch (unsupportedencodingexception g) system.out.println('unsupported character set' + g); pre> <p> <strong>Output:</strong> </p> <pre> The input String is : Welcome to JavaTpoint. After converted into UTF-16 the String is : -2-10870101010809901110109010103201160111032074097011809708401120111010501100116046 After converted into UTF-16BE the String is : 0870101010809901110109010103201160111032074097011809708401120111010501100116046 After converted into ISO-8859-1 the String is : 871011089911110910132116111327497118978411211110511011646 After converted into UTF-16LE the String is : 8701010108099011101090101032011601110320740970118097084011201110105011001160460 </pre> <h2>Java String class getBytes() Method Example 4</h2> <p>The following example shows when the charset is not supported by the getBytes() method, UnsupportedEncodingException is thrown.</p> <p> <strong>FileName:</strong> StringGetBytesExample4.java</p> <pre> public class StringGetBytesExample4 { // main method public static void main(String argvs[]) { // input string String str = 'Welcome to JavaTpoint.'; System.out.println('The input String is : '); System.out.println(str + '
'); // encoding into UTF - 17 byte[] byteArr = str.getBytes('UTF-17'); System.out.println('After converted into UTF-17 the String is : '); for (int j = 0; j <bytearr.length; j++) { system.out.print(bytearr[j]); } < pre> <p> <strong>Output:</strong> </p> <pre> /StringGetBytesExample4.java:11: error: unreported exception UnsupportedEncodingException; must be caught or declared to be thrown byte[] byteArr = str.getBytes('UTF-17'); ^ 1 error </pre> <hr></bytearr.length;></pre></bytearr.length;></pre></barr.length;i++){></pre></barr.length;i++){> Classe de chaîne Java getBytes(), méthode Exemple 2
Nom de fichier: StringGetBytesExample2.java
La méthode renvoie un tableau d'octets qui peut à nouveau être transmis au constructeur String pour obtenir String.
public class StringGetBytesExample2 { public static void main(String[] args) { String s1 = 'ABCDEFG'; byte[] barr = s1.getBytes(); for(int i=0;i <barr.length;i++){ system.out.println(barr[i]); } getting string back s2="new" string(barr); system.out.println(s2); < pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> 65 66 67 68 69 70 71 ABCDEFG </pre> <h2>Java String class getBytes() Method Example 3</h2> <p>The following example shows the encoding into a different charset.</p> <p> <strong>FileName:</strong> StringGetBytesExample3.java</p> <pre> // Import statement import java.io.*; public class StringGetBytesExample3 { // main method public static void main(String argvs[]) { // input string String str = 'Welcome to JavaTpoint.'; System.out.println('The input String is : '); System.out.println(str + '
'); // inside try block encoding is // being done using different charsets try { 16 - bit UCS Transformation format byte[] byteArr = str.getBytes('UTF-16'); System.out.println('After converted into UTF-16 the String is : '); for (int j = 0; j <bytearr.length; 16 j++) { system.out.print(bytearr[j]); } system.out.println(\'
\'); big endian byte order, - bit ucs transformation format byte[] bytearr1="str.getBytes('UTF-16BE');" system.out.println(\'after converted into utf-16be the string is : \'); for (int j="0;" < bytearr1.length; system.out.print(bytearr1[j]); iso latin alphabet bytearr2="str.getBytes('ISO-8859-1');" iso-8859-1 bytearr2.length; system.out.print(bytearr2[j]); little bytearr3="str.getBytes('UTF-16LE');" utf-16le bytearr3.length; system.out.print(bytearr3[j]); catch (unsupportedencodingexception g) system.out.println(\'unsupported character set\' + g); pre> <p> <strong>Output:</strong> </p> <pre> The input String is : Welcome to JavaTpoint. After converted into UTF-16 the String is : -2-10870101010809901110109010103201160111032074097011809708401120111010501100116046 After converted into UTF-16BE the String is : 0870101010809901110109010103201160111032074097011809708401120111010501100116046 After converted into ISO-8859-1 the String is : 871011089911110910132116111327497118978411211110511011646 After converted into UTF-16LE the String is : 8701010108099011101090101032011601110320740970118097084011201110105011001160460 </pre> <h2>Java String class getBytes() Method Example 4</h2> <p>The following example shows when the charset is not supported by the getBytes() method, UnsupportedEncodingException is thrown.</p> <p> <strong>FileName:</strong> StringGetBytesExample4.java</p> <pre> public class StringGetBytesExample4 { // main method public static void main(String argvs[]) { // input string String str = 'Welcome to JavaTpoint.'; System.out.println('The input String is : '); System.out.println(str + '
'); // encoding into UTF - 17 byte[] byteArr = str.getBytes('UTF-17'); System.out.println('After converted into UTF-17 the String is : '); for (int j = 0; j <bytearr.length; j++) { system.out.print(bytearr[j]); } < pre> <p> <strong>Output:</strong> </p> <pre> /StringGetBytesExample4.java:11: error: unreported exception UnsupportedEncodingException; must be caught or declared to be thrown byte[] byteArr = str.getBytes('UTF-17'); ^ 1 error </pre> <hr></bytearr.length;></pre></bytearr.length;></pre></barr.length;i++){> Classe de chaîne Java, méthode getBytes(), exemple 3
L'exemple suivant montre l'encodage dans un jeu de caractères différent.
Nom de fichier: StringGetBytesExample3.java
// Import statement import java.io.*; public class StringGetBytesExample3 { // main method public static void main(String argvs[]) { // input string String str = 'Welcome to JavaTpoint.'; System.out.println('The input String is : '); System.out.println(str + '
'); // inside try block encoding is // being done using different charsets try { 16 - bit UCS Transformation format byte[] byteArr = str.getBytes('UTF-16'); System.out.println('After converted into UTF-16 the String is : '); for (int j = 0; j <bytearr.length; 16 j++) { system.out.print(bytearr[j]); } system.out.println(\'
\'); big endian byte order, - bit ucs transformation format byte[] bytearr1="str.getBytes('UTF-16BE');" system.out.println(\'after converted into utf-16be the string is : \'); for (int j="0;" < bytearr1.length; system.out.print(bytearr1[j]); iso latin alphabet bytearr2="str.getBytes('ISO-8859-1');" iso-8859-1 bytearr2.length; system.out.print(bytearr2[j]); little bytearr3="str.getBytes('UTF-16LE');" utf-16le bytearr3.length; system.out.print(bytearr3[j]); catch (unsupportedencodingexception g) system.out.println(\'unsupported character set\' + g); pre> <p> <strong>Output:</strong> </p> <pre> The input String is : Welcome to JavaTpoint. After converted into UTF-16 the String is : -2-10870101010809901110109010103201160111032074097011809708401120111010501100116046 After converted into UTF-16BE the String is : 0870101010809901110109010103201160111032074097011809708401120111010501100116046 After converted into ISO-8859-1 the String is : 871011089911110910132116111327497118978411211110511011646 After converted into UTF-16LE the String is : 8701010108099011101090101032011601110320740970118097084011201110105011001160460 </pre> <h2>Java String class getBytes() Method Example 4</h2> <p>The following example shows when the charset is not supported by the getBytes() method, UnsupportedEncodingException is thrown.</p> <p> <strong>FileName:</strong> StringGetBytesExample4.java</p> <pre> public class StringGetBytesExample4 { // main method public static void main(String argvs[]) { // input string String str = 'Welcome to JavaTpoint.'; System.out.println('The input String is : '); System.out.println(str + '
'); // encoding into UTF - 17 byte[] byteArr = str.getBytes('UTF-17'); System.out.println('After converted into UTF-17 the String is : '); for (int j = 0; j <bytearr.length; j++) { system.out.print(bytearr[j]); } < pre> <p> <strong>Output:</strong> </p> <pre> /StringGetBytesExample4.java:11: error: unreported exception UnsupportedEncodingException; must be caught or declared to be thrown byte[] byteArr = str.getBytes('UTF-17'); ^ 1 error </pre> <hr></bytearr.length;></pre></bytearr.length;> Classe de chaîne Java, méthode getBytes(), exemple 4
L'exemple suivant montre que lorsque le jeu de caractères n'est pas pris en charge par la méthode getBytes(), UnsupportedEncodingException est levée.
xvideoservicethief ubuntu 14.04 télécharger
Nom de fichier: StringGetBytesExample4.java
public class StringGetBytesExample4 { // main method public static void main(String argvs[]) { // input string String str = 'Welcome to JavaTpoint.'; System.out.println('The input String is : '); System.out.println(str + '
'); // encoding into UTF - 17 byte[] byteArr = str.getBytes('UTF-17'); System.out.println('After converted into UTF-17 the String is : '); for (int j = 0; j <bytearr.length; j++) { system.out.print(bytearr[j]); } < pre> <p> <strong>Output:</strong> </p> <pre> /StringGetBytesExample4.java:11: error: unreported exception UnsupportedEncodingException; must be caught or declared to be thrown byte[] byteArr = str.getBytes('UTF-17'); ^ 1 error </pre> <hr></bytearr.length;>