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Java StringBuilder length()

By Chaitanya Singh | Filed Under: java

Java StringBuilder length() method returns the length of the string. The StringBuilder instance represents a character sequence, the length() method returns the total number of characters present in this sequence.

The syntax of length() method is:

//returns the length of the character sequence
//represented by StringBuilder instance sb
sb.length()

length() Description

public int length(): Returns the total count of characters in character sequence represented by sb. Here, sb is an object of StringBuilder class.

length() Parameters

  • It does not take any parameter.

length() Return Value

  • Returns the length of String.

Example 1 of StringBuilder length() method

public class JavaExample {
  public static void main(String[] args) {
    StringBuilder sb = new StringBuilder("Text");
    System.out.println("Length of string 'text': "+sb.length());

    //string with space, the whitespace is included in the count
    StringBuilder sb2 = new StringBuilder("Sample Text");
    System.out.println("Length of string 'Sample Text': "+sb2.length());
  }
}

Output:

Java StringBuilder length() example output_1

Example 2: Print length of user entered string

import java.util.Scanner;
public class JavaExample {
  public static void main(String[] args) {
    StringBuilder sb = new StringBuilder();

    //take user input
    System.out.print("Enter a string: ");
    Scanner scan = new Scanner(System.in);
    String str = scan.nextLine();

    //append user input into sb
    sb.append(str);

    //print length
    System.out.println("Length of entered string: "+sb.length());
  }
}

Output:

Java StringBuilder length() example output_2

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