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

Last Updated : 11 Jul, 2025
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The append(CharSequence, int, int) method of Writer 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 do not returns any value. Below methods illustrates the working of append(CharSequence, int, int) method: Program 1: Java 
// Java program to demonstrate
// Writer append(CharSequence, int, int) method

import java.io.*;

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

        try {

            // Create a Writer instance
            Writer writer
                = new PrintWriter(System.out);

            // 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);

            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}
Output: 
Geeks
Program 2: Java 
// Java program to demonstrate
// Writer append(CharSequence, int, int) method

import java.io.*;

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

        try {

            // Create a Writer instance
            Writer writer
                = new PrintWriter(System.out);

            // 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);

            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}
Output: 
G

C

code_r
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