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

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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);
        }
    }
}