Convert String to Stream of Chars in Java
The StringReader class from the java.io package in Java can be used to convert a String to a character stream. When you need to read characters from a string as though it were an input stream, the StringReader class can be helpful in creating a character stream from a string.
In this article, we will learn to convert a String to a char stream in Java.
Java Program to Convert String into Char Stream
Below is the implementation of Converting String to Char Stream:
Java
// Java Program to Convert String into Char Stream import java.io.IOException; import java.io.StringReader; // Driver Class public class StringToCharStreamExample { // Main Function public static void main(String[] args) { // Your input string String inputString = "Beginner For Beginner" ; // Create a StringReader object with the input // string StringReader stringReader = new StringReader(inputString); try { // Read characters from the StringReader and // print them int charValue; while ((charValue = stringReader.read())!= - 1 ) { char character = ( char )charValue; System.out.print(character); } } catch (IOException e) { e.printStackTrace(); } finally { // Close the StringReader to release resources stringReader.close(); } } } |
Output:
Beginner For Beginner
The input string “Beginner For Beginner” is converted into a character stream using the StringReader, and each character is then written to the terminal.
Explanation of the above Program:
Step 1: Take Input from the User.
String inputString = "Beginner For Beginner";You wish to turn the string “Beginner For Beginner” into a character stream, therefore this line initializes a String variable called inputString with that value.
Step 2: Initialising the StringReader Object
StringReader stringReader = new StringReader(inputString);Here, the input string is used to build a StringReader object with the identifier stringReader. You can read characters from a string as if it were an input stream by using this class.
Step 3: Using StringReader to convert Input String into Char Stream
int charValue;
while ((charValue = stringReader.read()) != -1) {
char character = (char) charValue;
System.out.print(character);
}This section of the code loops through each character in the string using a while loop. To read characters from the StringReader, use the read() function. When read() returns -1, the loop ends. This happens till the end of the stream. Every character is cast to a char inside the loop before being printed to the console.
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