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  4. The ensureCapacity() method changes the default capacity of a StringBuffer object
public class MainClass {
  public static void main(String[] arg) {
    StringBuffer newString = new StringBuffer("abcde");
    
    System.out.println(newString.capacity());
    
    newString.ensureCapacity(40);
    
    System.out.println(newString.capacity());
  }
}
/*
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