test1.java

来自「高质量Java程序设计 源代码」· Java 代码 · 共 23 行

package net.betterjava.design.refactor;

import java.util.HashSet;
import java.util.Set;

/**
 * test Set.add().
 */
public class Test1 {
	public static void main(String[] args) {
		int outerLoop = 10000;
		int innerLoop = 1000;
		Set aSet = new HashSet();

		long elapse = System.currentTimeMillis();
		for (int i = 0; i < outerLoop; i++)
			for (int j = 0; j < innerLoop; j++)
				aSet.add(String.valueOf(j));
		System.out.println(
			(System.currentTimeMillis() - elapse) * 1.0 / (outerLoop * innerLoop));
	}
}