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