java 时间毫秒转换成hhmmss
package com.iteye.injavawetrust.ad;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.TimeZone;
import java.util.UUID;
/**
* 毫秒转换成秒hhmmss
* @author InJavaWeTrust
*
*/
public class TestDate {
/**
* 毫秒转换成hhmmss
* @param ms 毫秒
* @return hh:mm:ss
*/
public static String msToss(long ms) {
SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
formatter.setTimeZone(TimeZone.getTimeZone("GMT+00:00"));
String ss = formatter.format(ms);
return ss;
}
public static void main(String[] args) {
long startTime = System.currentTimeMillis();
int max = 1000000;
List<String> values = new ArrayList<>(max);
for (int i = 0; i < max; i++) {
UUID uuid = UUID.randomUUID();
values.add(uuid.toString());
}
long endTime = System.currentTimeMillis();
System.out.println("用时[" + TestDate.msToss(endTime - startTime) + "]");
}
}