Reader read(char[], int, int) method in Java with Examples Last Updated : 11 Jul, 2025 Summarize Comments Improve Suggest changes Share Like Article Like Report The read(char[], int, int) method of Reader Class in Java is used to read the specified length characters into an array at a specified offset. This method blocks the stream till: It has taken some input from the stream. Some IOException has occurred It has reached the end of the stream while reading. Syntax: public int read(char[] charArray, int offset, int length) Parameters: This method accepts three mandatory parameters: charArray which is the character array to be written in the Stream. offset which is the offset index at which the characters are to be written in the array. length which is the number of characters to be written in the array. Return Value: This method returns an integer value which is the number of characters read from the stream. It returns -1 if no character has been read. Exception: This method throws following exceptions: IOException: if some error occurs while input output. IndexOutOfBoundsException: if the offset value is not within the range of character array Below methods illustrates the working of read(char[], int, int) method: Program 1: Java // Java program to demonstrate // Reader read(char[], int, int) method import java.io.*; import java.util.*; class GFG { public static void main(String[] args) { try { String str = "GeeksForGeeks"; // Create a Reader instance Reader reader = new StringReader(str); // Get the character array // to be read from the stream char[] charArray = new char[5]; // Get the offset index int offset = 0; // Get the length int length = 5; // Read the charArray // to this reader using read() method // This will put the str in the stream // till it is read by the reader reader.read(charArray, offset, length); // Print the read charArray System.out.println( Arrays.toString(charArray)); reader.close(); } catch (Exception e) { System.out.println(e); } } } Output: [G, e, e, k, s] Program 2: Java // Java program to demonstrate // Reader read(char[], int, int) method import java.io.*; import java.util.*; class GFG { public static void main(String[] args) { try { String str = "GeeksForGeeks"; // Create a Reader instance Reader reader = new StringReader(str); // Get the character array // to be read from the stream char[] charArray = new char[str.length()]; // Get the offset index int offset = 0; // Get the length int length = str.length(); // Read the charArray // to this reader using read() method // This will put the str in the stream // till it is read by the reader reader.read(charArray, offset, length); // Print the read charArray System.out.println( Arrays.toString(charArray)); reader.close(); } catch (Exception e) { System.out.println(e); } } } Output: [G, e, e, k, s, F, o, r, G, e, e, k, s] Reference: https://docs.oracle.com/javase/9/docs/api/java/io/Reader.html#read-char:A-int-int- Comment More infoAdvertise with us Next Article PushbackReader read(char, int, int) method in Java with Examples C code_r Follow Improve Article Tags : Java Java-Functions Java-IO package Java-Reader Practice Tags : Java Similar Reads StringReader read(char[], int, int) method in Java with Examples The read(char[], int, int) method of StringReader Class in Java is used to read the specified length characters into an array at a specified offset. This method blocks the stream till: It has taken some input from the stream. Some IOException has occurred It has reached the end of the stream while r 3 min read Reader read(char[]) method in Java with Examples The read(char[]) method of Reader Class in Java is used to read the specified characters into an array. This method blocks the stream till: It has taken some input from the stream.Some IOException has occurredIt has reached the end of the stream while reading. Syntax: public int read(char[] charArra 3 min read PushbackReader read(char, int, int) method in Java with Examples The read(char[], int, int) method of PushbackReader Class in Java is used to read the specified length characters into an array at a specified offset. This method blocks the stream till: It has taken some input from the stream. 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This method blocks the stream till: It has taken some input from the stream. Some IOException has occurred It has reached the end of the stream while reading. This method is declared as abstract method. It 3 min read Like