StringWriter append(CharSequence, int, int) method in Java with Examples

The append(CharSequence, int, int) method of StringWriter Class in Java is used to append a specified portion of the specified charSequence on the writer. This charSequence is taken as a parameter. The starting index and ending index to be written are also taken as parameters.

Syntax:

public void append(CharSequence charSequence, int startingIndex, int endingIndex)

Parameters: This method accepts three mandatory parameters:

• charSequence which is the charSequence to be written in the Stream.
• startingIndex which is the starting index from which the portion of character is to taken.
• endingIndex which is the ending index to be written on the writer.

Return Value: This method does not returns any value.

Below programs illustrates the working of append(CharSequence, int, int) method:

Program 1:

// Java program to demonstrate
// StringWriter append(CharSequence, int, int) method

import java.io.*;

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

        try {

            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();

            // Get the charSequence
            // to be written in the writer
            CharSequence charSequence = "GeeksForGeeks";

            // Get the starting index
            int startingIndex = 0;

            // Get the length of char
            int endingIndex = 5;

            // Write the portion of the charSequence
            // to this writer using append() method
            // This will put the charSequence in the writer
            // till it is printed on the console
            writer.append(charSequence,
                          startingIndex,
                          endingIndex);

            System.out.println(writer.toString());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

Geeks

Program 2:

// Java program to demonstrate
// StringWriter append(CharSequence, int, int) method

import java.io.*;

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

        try {

            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();

            // Get the charSequence
            // to be written in the writer
            CharSequence charSequence = "GFG";

            // Get the starting index
            int startingIndex = 2;

            // Get the length of char
            int endingIndex = 3;

            // Write the portion of the charSequence
            // to this writer using append() method
            // This will put the charSequence in the writer
            // till it is printed on the console
            writer.append(charSequence,
                          startingIndex,
                          endingIndex);

            System.out.println(writer.toString());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

G