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Java StringBuilder codePointAt() method with example

StringBuilder Class charAt() method: Here, we are going to learn about the charAt() method of StringBuilder Class with its syntax and example.
Submitted by Preeti Jain, on December 21, 2019

StringBuilder Class charAt() method

  • charAt() method is available in java.lang package.
  • charAt() method is used to return the Unicode code point at the given indices and array indexing starts at 0 and ending at length () - 1.
  • charAt() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • charAt() method may throw an exception at the time of assigning index.
    IndexOutOfBoundsException - This exception may throw when the given argument value is greater than the length or denotes negative value.

Syntax:

    public int codePointAt(int indices);

Parameter(s):

  • int indices – represents the index to the referred character values.

Return value:

The return type of this method is int, it returns the Unicode code point of the char at the given indices.

Example:

// Java program to demonstrate the example 
// of int codePointAt(int indices) method of StringBuilder 

public class CodePointAt {
    public static void main(String[] args) {
        // Creating an StringBuilder object
        StringBuilder st_b = new StringBuilder("Java");
        System.out.println("st_b = " + st_b);

        // By using codePointAt(2) method is to return the codepoint
        // at the given index 2
        int cp = st_b.codePointAt(2);

        // Display codepoint value at the given index 2
        System.out.println("st_b.codePointAt(2)=" + cp);
    }
}

Output

st_b = Java
st_b.codePointAt(2)=118






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