Java StringBuffer chars() Method

Last Updated : 23 Jul, 2025

In Java, the chars() method of the StringBuffer class converts the characters in the StringBuffer to an IntStream. This method is useful for iterating over, processing, or filtering characters in a StringBuffer.

Example 1: Here, we will iterate over characters by using the chars() method and it will print the Unicode code points of each character in a StringBuffer object.

Java

// Java Program to demonstrate chars() method with a StringBuffer import java.util.stream.*; public class Chars {    public static void main(String[] args) {    // Create a StringBuffer object  StringBuffer b = new StringBuffer("Java");  // Use chars() method to get an IntStream and   // print each character's Unicode  b.chars()  .forEach(codePoint -> System.out.println("" + codePoint));  } }

Output

74 97 118 97

Syntax of `chars()` Method

IntStream chars()

Parameter: None
Return Type: IntStream: It returns an IntStream representing the Unicode code points of the characters in the StringBuffer.

Example 2: Here, we will use the chars() method to process numeric characters in the StringBuffer.

Java

// Java Program to process numeric characters using chars() method import java.util.stream.*; public class Chars {    public static void main(String[] args) {    // Create a StringBuffer object   // with numeric characters  StringBuffer b = new StringBuffer("12345");  // Use chars() to iterate over the   // characters and print them  b.chars()  .forEach(ch -> System.out.print((char) ch + " "));  } }

Output

1 2 3 4 5

Example 3: Here, we will use the chars() method with a StringBuffer containing both letters and digits.

Java

// Java Program to handle mixed content in a  // StringBuffer using chars() method import java.util.stream.*; public class Chars {    public static void main(String[] args) {    // Create a StringBuffer object with   // mixed characters  StringBuffer b = new StringBuffer("swe217ami");  // Use chars() method to print   // Unicode values of each character  b.chars()  .forEach(cp -> System.out.println("" + cp));  } }