setuse.java

来自「JAVA编程思想源代码 值得一下 很难找的」· Java 代码 · 共 40 行

package chapter7;

import java.util.*;

public class SetUse {
	public static void main(String[] args) {

		// Create two sets.
		Set s1 = new HashSet();
		s1.add("Pang Lina");
		s1.add("Lina Pang");
		s1.add("Chen Xinwei");

		Set s2 = new HashSet();
		s2.add("Xinwei Chen");
		s2.add("Java  Book");

		Set union = new TreeSet(s1);
		union.addAll(s2); // now contains the union

		print("set", union);

		Set intersect = new TreeSet(s1);
		intersect.retainAll(s2);

		print("inter__section", intersect);

	}

	protected static void print(String label, Collection c) {

		System.out.println("--------------" + label + "--------------");

		Iterator it = c.iterator();
		while (it.hasNext()) {
			System.out.println(it.next());
		}
	}
}