import java.text.DateFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 测试java语言的性能
 * @author fjl
 *
 */
public class JavaTest
{

	public static void main(String[] args)
	{
		sub();
		
//		percentTest();
	}
	
	
	
	/**
	 * 百分比测试
	 */
	
	public static void percentTest()
	{
		 int diliverNum=3;//举例子的变量
 int queryMailNum=9;//举例子的变量
 
 		
 // 创建一个数值格式化对象 
 NumberFormat numberFormat = NumberFormat.getInstance(); 
 // 设置精确到小数点后2位 
 numberFormat.setMaximumFractionDigits(2); 
 String result = numberFormat.format((float)diliverNum/(float)queryMailNum*100);
 System.out.println("diliverNum和queryMailNum的百分比为:" + result + "%"); 	 

 //测试代码留作纪念
 double percent = (float)diliverNum/(float)queryMailNum*100;
 		System.out.println(percent);
 		 double percentTest = diliverNum/queryMailNum*100;
 		System.out.println("见证奇迹的时候:"+percentTest);
	}
	
	
	
	/**
	 * 累加测试
	 * 
	 * @return
	 */
	public static double sub()
	{
		 long startTime=System.currentTimeMillis();
		int sum = 0;
	 for(int i = 0; i < 10000000; i++ )
	 {
		 
		 sum += i; 
	 }
	 long endTime=System.currentTimeMillis();
	 //计算时间差
	 long number = startTime - endTime;
//	 System.out.println(number);
	 float excTime=(float)(endTime-startTime)/1000;
 System.out.println("执行时间:"+excTime+"s");
	 
	 return sum;
	}
}