StringBuffer trimToSize() method in Java with Examples

The trimToSize() method of StringBuffer class is the inbuilt method used to trims the capacity used for the character sequence of StringBuffer object. If the buffer used by StringBuffer object is larger than necessary to hold its current sequence of characters, then this method is called to resize the StringBuffer object for converting this object to more space efficient. Calling this method may, but is not required to, affect the value returned by a subsequent call to the capacity() method.

Syntax:

public void trimToSize()

Returns: This method does not return anything.



Below programs illustrate the StringBuffer.trimToSize() method:

Example 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// the trimToSize() Method.
  
class GFG {
    public static void main(String[] args)
    {
  
        // create a StringBuffer object
        // with a String pass as parameter
        StringBuffer str
            = new StringBuffer("GeeksForGeeks");
  
        // add more string to StringBuffer
        str.append("Contribute");
  
        // print capacity
        System.out.println("Capacity before "
                           + "applying trimToSize() = "
                           + str.capacity());
  
        // applying trimToSize() Method
        str.trimToSize();
  
        // print string
        System.out.println("String = " + str.toString());
  
        // print capacity
        System.out.println("Capacity after"
                           + " applying trimToSize() = "
                           + str.capacity());
    }
}

chevron_right


Output:

Capacity before applying trimToSize() = 29
String = GeeksForGeeksContribute
Capacity after applying trimToSize() = 23

Example 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// the trimToSize() Method.
  
class GFG {
    public static void main(String[] args)
    {
  
        // create a StringBuffer object
        // with a String pass as parameter
        StringBuffer str
            = new StringBuffer();
  
        // add more string to StringBuffer
        str.append("GeeksForGeeks classes");
  
        // print capacity
        System.out.println("Capacity before"
                           + " applying trimToSize() = "
                           + str.capacity());
  
        // applying trimToSize() Method
        str.trimToSize();
  
        // print string
        System.out.println("String = " + str.toString());
  
        // print capacity
        System.out.println("Capacity after "
                           + "applying trimToSize() = "
                           + str.capacity());
    }
}

chevron_right


Output:

Capacity before applying trimToSize() = 34
String = GeeksForGeeks classes
Capacity after applying trimToSize() = 21

References:
https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuffer.html#trimToSize()



My Personal Notes arrow_drop_up

I am a Developer I love to code and bring my ideas alive

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.