Java™ How To Program (Early Objects), Tenth Edition

14.4.2 StringBuilder Methods length, capacity, setLength and ensureCapacity

Class StringBuilder provides methods length and capacity to return the number of characters currently in a StringBuilder and the number of characters that can be stored in a StringBuilder without allocating more memory, respectively. Method ensureCapacity guarantees that a StringBuilder has at least the specified capacity. Method setLength increases or decreases the length of a StringBuilder. Figure 14.11 demonstrates these methods.

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 1   // Fig. 14.11: StringBuilderCapLen.java 2   // StringBuilder length, setLength, capacity and ensureCapacity methods. 3  4   public class StringBuilderCapLen 5   { 6      public static void main(String[] ...