The Java.io.CharArrayWriter class implements a character buffer that can be used as a Writer. Data written to the stream automatically expands the buffer.<\/p>\n
The CharArrayWriter class is a subclass of the Writer abstract class. Its purpose is to write characters from a char array to a buffer that is also a char array and then from this buffer to a character stream.<\/p>\n
Syntax<\/strong><\/p>\n Output<\/strong> Output <\/strong> Using the Char array writer class, we can write shared data to several files. This class creates a buffer for writing data. When data is written to the stream, this buffer expands automatically and has no set size.<\/p>\n","protected":false},"excerpt":{"rendered":" The Java.io.CharArrayWriter class implements a character buffer that can be used as a Writer. Data written to the stream automatically expands the buffer. Explanation The CharArrayWriter class is a subclass of the Writer abstract...<\/p>\n","protected":false},"author":6,"featured_media":447249,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[183],"tags":[5526,334,296,335,5527,299,263,250],"class_list":["post-89841","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-chararraywriter-class","tag-chararraywriter-class-in-java","tag-java","tag-java-chararraywriter-class","tag-java-chararraywriter-class-with-example","tag-java-tutorial","tag-java-tutorial-for-beginners","tag-learn-java"],"yoast_head":"\npublic class CharArrayWriter extends Writer<\/pre>\n
Constructor<\/h3>\n
\n
\nWith the given array of characters, a CharArrayReader is created.<\/li>\n
\nUsing the given initial size generates a new CharArrayWriter.<\/li>\n<\/ul>\nMethod<\/h3>\n
\n
\nThe specified character is appended to this writer by this method.CharArrayWriter append(CharSequence csq)The given character sequence is appended to this writer by this method.<\/li>\n
\nThis method adds a subsequence of the given character sequence to this writer.<\/li>\n
\nThis technique ends the stream.<\/li>\n
\nThis technique clears the stream.<\/li>\n
\nThis method resets the buffer, allowing you to use it again without wasting the previously allocated buffer.<\/li>\n
\nThis method returns the buffer’s current size.<\/li>\n
\nThis method returns a copy of the input data.<\/li>\n
\nThis technique creates a string out of the input data.<\/li>\n
\nWrites characters to the buffer using this method.<\/li>\n
\nWrite a character to the buffer using this method.<\/li>\n
\nUsing this method, a string section is written to the buffer.<\/li>\n
\nThe contents of the buffer are written to a different character stream using this method.<\/li>\n<\/ul>\nField<\/h3>\n
\n
\nThis is the buffer used to hold data.<\/li>\n
\nThis is the buffer’s character count.<\/li>\n
\nThis is the object that keeps this stream’s operations in sync.<\/li>\n<\/ul>\n\n\n
\n Type<\/strong><\/td>\n Method<\/strong><\/td>\n Description<\/strong><\/td>\n<\/tr>\n \n CharArrayWritter<\/span><\/td>\n append<\/span>(char c)<\/span><\/td>\n Adds this writer’s specified character.<\/span><\/td>\n<\/tr>\n \n CharArrayWritter<\/span><\/td>\n append<\/span>(<\/span>CharSequence<\/span> csq)<\/span><\/td>\n Appends to this writer the designated character sequence.<\/span><\/td>\n<\/tr>\n \n CharArrayWritter<\/span><\/td>\n append<\/span>(<\/span>CharSequence<\/span> csq, int start, int end)<\/span><\/td>\n Attached is a portion of the designated character sequence for this writer.<\/span><\/td>\n<\/tr>\n \n void<\/span><\/td>\n close()<\/span><\/td>\n It shutdown the stream<\/span><\/td>\n<\/tr>\n \n void<\/span><\/td>\n flush()<\/span><\/td>\n Make the stream run.<\/span><\/td>\n<\/tr>\n \n void<\/span><\/td>\n Reset()<\/span><\/td>\n Resetting the buffer allows you to utilize it once more without wasting the previously allocated space.<\/span><\/td>\n<\/tr>\n \n int<\/span><\/td>\n Size()<\/span><\/td>\n Gives back the buffer’s current size.<\/span><\/td>\n<\/tr>\n \n char[]<\/span><\/td>\n toCharArray()<\/span><\/td>\n Gives back a duplicate of the input data.<\/span><\/td>\n<\/tr>\n \n string<\/span><\/td>\n toString()<\/span><\/td>\n converts the data input to a string.<\/span><\/td>\n<\/tr>\n \n Void<\/span><\/td>\n write<\/span>(char[] c, int off, int len)<\/span><\/td>\n It enters the buffer with characters.<\/span><\/td>\n<\/tr>\n \n void<\/span><\/td>\n write<\/span>(int c)<\/span><\/td>\n A character is written to the buffer.<\/span><\/td>\n<\/tr>\n \n void<\/span><\/td>\n writeTo<\/span>(<\/span>Writer<\/span> out)<\/span><\/td>\n Writes the buffer’s contents to a different character stream.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Example<\/h4>\n
package studytonight;\r\nimport java.io.CharArrayWriter;\r\nimport java.io.FileWriter;\r\npublic class StudyTonight \r\n{\r\n public static void main(String args[]) throws Exception\r\n {\r\n CharArrayWriter writer=new CharArrayWriter(); \r\n writer.write(\"Hello Studytonight\"); \r\n FileWriter fileWriter=new FileWriter(\"E:\\studytonight\\\\output.txt\"); \r\n writer.writeTo(fileWriter); \r\n fileWriter.close(); \r\n System.out.println(\"Data is written successfully...\"); \r\n }\r\n}<\/pre>\n
\nData is written successfully…<\/p>\nExample<\/h4>\n
import java.io.*;\r\nclass A\r\n{\r\npublic static void main(String... ar)\r\n{\r\nchar[] arr1= new char[]{'j','a','v','a'};\r\nchar[] arr2= new char[]{'p','r','o','g','r',\u2019a\u2019,\u2019m\u2019};\r\n\r\ntry\r\n{\r\nCharArrayWriter caw= new CharArrayWriter(); \r\nSystem.out.println(\"Initial Size of the buffer = \"+ caw.size());\r\n\r\nfor(char ch : arr1) \r\n{\r\ncaw.write(ch);\r\n}\r\n\r\ncaw.write(arr2); \r\n\r\nSystem.out.println(\"Content of buffer = \"+ caw.toString());\r\nSystem.out.println(\"Size of the buffer = \"+ caw.size());\r\n\r\nFileWriter fw = new FileWriter(\"D:\\\\TextBook2.txt\");\r\ncaw.writeTo(fw);\r\n\r\nfw.flush();\r\ncaw.flush();\r\ncaw.close();\r\n}\t\t \t \r\ncatch(IOException e)\r\n{\r\nSystem.out.println(e);\r\n}\r\n\r\n}\r\n}<\/pre>\n
\nInitial Size of the buffer = 0
\nContent of buffer = javaprogram
\nSize of the buffer = 13<\/p>\nConclusion<\/h3>\n