Java Program to Clear the StringBuffer

In this article, we will understand how to clear the StringBuffer. StringBuffer is a peer class of String that provides much of the functionality of strings. String represents fixed-length, immutable character sequences while StringBuffer represents growable and writable character sequences.

Below is a demonstration of the same −

Suppose our input is −

This string buffer is defined as: Java Program

The desired output would be −

The string buffer after clearing:

Algorithm

Step 1 - START
Step 2 - Declare an object of StringBuffer namely string-buffer.
Step 3 - Define the values.
Step 4 - Call the inbuilt function .delete() and pass the values 0 and buffer size to clear the buffer.
Step 5 - Display the result
Step 6 - Stop

Example 1

Here, we use delete() function to clear the buffer.

public class Buffer {
   public static void main(String[] args) {
      StringBuffer string_buffer = new StringBuffer();
      string_buffer.append("Java");
      string_buffer.append(" Program");
      System.out.println("This string buffer is defined as: " + string_buffer);
      string_buffer.delete(0, string_buffer.length());
      System.out.println("The string buffer after clearing: " + string_buffer);
   }
}

Output

This string buffer is defined as: Java Program
The string buffer after clearing:

Example 2

Here, we use setLength() function to clear the buffer.

public class Buffer {
   public static void main(String[] args) {
      StringBuffer string_buffer = new StringBuffer();
      string_buffer.append("Java");
      string_buffer.append(" Program");
      System.out.println("This string buffer is defined as: " + string_buffer);
      string_buffer.setLength(0);
      System.out.println("The string buffer after clearing: " + string_buffer);
   }
}

Output

This string buffer is defined as: Java Program
The string buffer after clearing: