setiteratordemo.java

来自「java的书上例子」· Java 代码 · 共 31 行

//例15-4.
import java.util.*;

public class SetIteratorDemo {
	public static void main(String[] args) {
		Set s = new HashSet();
		s.add("Hello");
		s.add("World");
		s.add(new Character('我'));
		s.add(new Integer(23));
		s.add(new Double(23.12));
		s.add(null);
		Iterator i = s.iterator();
		System.out.print("[ ");
		boolean first = true;
		while(i.hasNext()) {
			System.out.print(i.next()+"  ");
			if ( first ) {
				i.remove();
				first = false;
			}
		}
		System.out.println("]");
		i = s.iterator();
		System.out.print("[ ");
		while(i.hasNext())
			System.out.print(i.next()+"  ");
		System.out.println(")");
	}
}