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Java StringBuilder deleteCharAt() method with example

StringBuilder Class deleteCharAt() method: Here, we are going to learn about the deleteCharAt() method of StringBuilder Class with its syntax and example.
Submitted by Preeti Jain, on December 22, 2019

StringBuilder Class deleteCharAt() method

• deleteCharAt() method is available in java.lang package.
• deleteCharAt() method is used to delete the character at the given index.
• deleteCharAt() 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.
• deleteCharAt() method may throw an exception at the time of assigning index.
  StringIndexOutOfBoundsException - This exception may throw when the given argument value is less than 0 or larger than or similar to length().

Syntax:

    public StringBuilder deleteCharAt(int indices);

Parameter(s):

• int indices – represents the index of deleting character.

Return value:

The return type of this method is StringBuilder, it returns this StringBuilder object.

Example:

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

public class DeleteCharAt {
    public static void main(String[] args) {
        // Creating an StringBuilder object
        StringBuilder st_b = new StringBuilder("Java World");

        // Display before deletion
        System.out.println("st_b = " + st_b);

        // By using deleteCharAt(4) method is to delete the character
        // i.e. whitespace at the given index 4
        st_b = st_b.deleteCharAt(4);

        // Display st_b after deletion
        System.out.println("st_b.deleteCharAt(4) = " + st_b);
    }
}

Output

st_b = Java World
st_b.deleteCharAt(4) = JavaWorld