ال فئة سلسلة جافا getBytes () تقوم الطريقة بترميز السلسلة في تسلسل البايتات وتحتفظ بها في مصفوفة من البايتات.
إمضاء
هناك ثلاثة أنواع مختلفة من طريقة getBytes (). التوقيع أو بناء جملة طريقة getBytes () موضح أدناه:
public byte[] getBytes() public byte[] getBytes(Charset charset) public byte[] getBytes(String charsetName)throws UnsupportedEncodingException
حدود
charset / charsetName - اسم مجموعة الأحرف التي تدعمها الطريقة.
عائدات
تسلسل البايتات.
رميات الاستثناء
استثناء ترميز غير مدعوم: يتم طرحه عندما لا تكون الطريقة مدعومة بمجموعة الأحرف المذكورة.
التنفيذ الداخلي
public byte[] getBytes() { return StringCoding.encode(value, 0, value.length); } مثال على طريقة getBytes () لفئة السلسلة
يقوم أسلوب getBytes() بدون معلمات بتشفير السلسلة باستخدام مجموعة الأحرف الافتراضية للنظام الأساسي، وهي UTF - 8. يوضح المثالان التاليان نفس الشيء.
الحدود باستخدام CSS
اسم الملف: 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++){> Java String class getBytes() طريقة المثال 2
اسم الملف: StringGetBytesExample2.java
تُرجع الطريقة مصفوفة بايت يمكن تمريرها مرة أخرى إلى مُنشئ السلسلة للحصول على السلسلة.
اسم
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++){> Java String class getBytes() طريقة المثال 3
يوضح المثال التالي الترميز في مجموعة أحرف مختلفة.
اسم الملف: 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;> Java String class getBytes() طريقة المثال 4
يوضح المثال التالي عندما لا تكون مجموعة الأحرف مدعومة بواسطة طريقة getBytes()، يتم طرح UnsupportedEncodingException.
اسم الملف: 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;>