Java StringBuilder substring() Method Example

Java StringBuilder provides two overloaded versions of the substring() method:

1. String substring(int start) - Returns a new String that contains a subsequence of characters currently contained in this character sequence.
2. String substring(int start, int end) - Returns a new String that contains a subsequence of characters currently contained in this sequence.

Java StringBuilder lastIndexOf() Method Example

This example demonstrates the usage of both overloaded versions of substring() methods.

public class SubStringExample {
    public static void main(String[] args) {
        StringBuilder builder = new StringBuilder("javaguides");
        // substring from start to end
        String subStr = buffer.substring(0, builder.length());
        System.out.println("substring from 0 to length of the string : " + subStr);
  
        // print java
        System.out.println(builder.substring(0, 4));
  
        // print guides
        System.out.println(builder.substring(4, builder.length()));
    }
}

Output:

substring from 0 to length of the string : javaguides
java
guides

Reference

https://www.javaguides.net/2018/08/java-stringbuilder-class-api-guide.html