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StringBuilder length() in Java with Examples

Last Updated : 15 Oct, 2018

The length() method of StringBuilder class returns the number of character the StringBuilder object contains. The length of the sequence of characters currently represented by this StringBuilder object is returned by this method. Syntax:

public int length()

Return Value: This method returns length of sequence of characters contained by StringBuilder object. Below programs demonstrate the length() method of StringBuilder Class: Example 1:

Java

// Java program to demonstrate
// the length() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuilder object
        // with a String pass as parameter
        StringBuilder
            str
            = new StringBuilder("WelcomeGeeks");

        // print string
        System.out.println("String = "
                           + str.toString());

        // get length of StringBuilder object
        int length = str.length();

        // print length
        System.out.println("length of String = "
                           + length);
    }
}

Output:

String = WelcomeGeeks
length of String = 12

Example 2:

Java

// Java program to demonstrate
// the length() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuilder object
        // with a String pass as parameter
        StringBuilder
            str
            = new StringBuilder("India is Great");

        // print string
        System.out.println("String = "
                           + str.toString());

        // get length of StringBuilder object
        int length = str.length();

        // print length
        System.out.println("length of String = "
                           + length);
    }
}

Output:

String = India is Great
length of String = 14

Reference: https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuilder.html#length()

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