The usage of time and date

最新推荐文章于 2025-09-08 16:51:26 发布

最新推荐文章于 2025-09-08 16:51:26 发布 · 131 阅读

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本文介绍了几种使用Java进行时间处理的方法，包括如何通过getTime获取唯一值、日期与字符串之间的转换以及计算程序运行时间。

There are some usage of time we often used for developping,here is my submit:

one:

Get the unique value by getTime

    import java.sql.Timestamp;

    import java.util.Date;

       Date date=new Date();

       Timestamp st=new Timestamp(date.getTime());

       String uniqueStr="U";

       uniqueStr=uniqueStr+st.getTime(); //the sum of microsecond from 1970

two :

The transition of Date and String()

public class StringToDate {

    public static Date stringToDate(String dateString){

      Date date;

       try {

           date = new SimpleDateFormat("yyyy-MM-dd").parse(dateString);

           return date;

       } catch (ParseException e) {

           // TODO Auto-generated catch block

           e.printStackTrace();

           return null;

       }

    }

Three, when we want to calculate the time of execution of our program:

long startTime = System.currentTimeMillis();
long endTime = System.currentTimeMillis();
System.out.println("The time used is "+(endTime-startTime)+" ms");

If you have some good methods of time ,pls share it!