计算两个日期相差天数

[java]代码库

import java.util.*;

public class Test {
	public static void main(String args[]) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(new Date());

		calendar.set(1991, 7, 7);
		long time_1 = calendar.getTimeInMillis();

		calendar.set(2012, 8, 31);
		long time_2 = calendar.getTimeInMillis();

		long space = (time_2 - time_1) / (1000 * 60 * 60 * 24);
		System.out.println("至今我活了大约 " + space + " 天");
	}
}

[代码运行效果截图]