Java中TreeSet 使用范例代码
import java.util.TreeSet; public class myTreeSet { public static void main(String[] args) { TreeSet<String> animals = new TreeSet<String>(); animals.add("Dog"); animals.add("Cat"); animals.add("Sparrow"); animals.add("Iguana"); animals.add("Dragon"); animals.add("Peacock"); System.out.println("Number of animals = " + animals.size()); for (String name : animals) { System.out.println(name); } System.out.println("Animal before Sparrow: " + animals.lower("Sparrow")); System.out.println("Animal after Sparrow: " + animals.higher("Sparrow")); System.out.println("First element: " + animals.first()); System.out.println("Last element: " + animals.last()); } }