capacity()

public synchronized int capacity()

The capacity is the amount of storage available for newly inserted characters, beyond which an allocation will occur. Return the current capacity.

public class StringBufferCapacity {
    public static void main(String args[]){
        StringBuffer s1 = new StringBuffer("Hi");
        System.out.println("Capacity of s1 is " + s1.capacity());
    }
}

Output

Capacity of s1 is 18

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