java bitSet简单使用

package Contain;

import java.util.BitSet;

public class MyBitset {

	public static void main(String[] args) {

		BitSet bm = new BitSet();

		System.out.println(bm.isEmpty() + "--" + bm.size());

		int i = 0;

		for (i = 0; i < 100; i++){

			bm.set(i);

		}

		System.out.println(bm.isEmpty() + "--" + bm.size());

		for (i = 0; i < 100; i++){

			System.out.println(bm.get(i));

		}

	}

}

　　按64倍数扩容。 线程不安全。key越大，占用内存越多size