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How to Convert Char to String in Java?

Convert String to Stream of Chars in Java

Last Updated : 26 Jan, 2024

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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 = "Geeks For Geeks";          // 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:

Geeks For Geeks

The input string "Geeks For Geeks" 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 = "Geeks For Geeks";
You wish to turn the string "Geeks For Geeks" 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.

How to Convert Char to String in Java?

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Article Tags :

Java
Java Programs
Java-Strings
java-stream
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Practice Tags :

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Java-Strings

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