有没有只针对24小时的Date类,就是说无视前面的年月日

Question

我本来想继承Date类自己写一个覆盖befor(),after()方法的,但是苦于Date类我不会设置时区

Answer 1

没有只针对时分秒的date类，对时间进行操作，正如前面那位兄弟所说，用Calendar，date的大多数方法现在sun都已不推荐使用。

Answer 2

我自己吧GregorianCalendar继承了,终于做到了,我把代码贴上来吧package Time;import java.util.GregorianCalendar;
import java.util.TimeZone;public class MyTimeClass extends GregorianCalendar
{ public MyTimeClass (TimeZone tz)
{
super(tz);
}
public boolean after(Object arg0)
{
// TODO Auto-generated method stub
if (!(arg0 instanceof GregorianCalendar))
super.after(arg0);
else
{
GregorianCalendar compare = (GregorianCalendar) arg0;
if (this.get(GregorianCalendar.HOUR_OF_DAY) > compare
.get(GregorianCalendar.HOUR_OF_DAY))
return true;
else if (this.get(GregorianCalendar.HOUR_OF_DAY) < compare
.get(GregorianCalendar.HOUR_OF_DAY))
return false;
if (this.get(GregorianCalendar.MINUTE) > compare
.get(GregorianCalendar.MINUTE))
return true;
else if (this.get(GregorianCalendar.MINUTE) < compare
.get(GregorianCalendar.MINUTE))
return false;
if (this.get(GregorianCalendar.SECOND) > compare
.get(GregorianCalendar.SECOND))
return true;
else if (this.get(GregorianCalendar.SECOND) < compare
.get(GregorianCalendar.SECOND))
return false;
if (this.get(GregorianCalendar.MILLISECOND) > compare
.get(GregorianCalendar.MILLISECOND))
return true;
else if (this.get(GregorianCalendar.MILLISECOND) < compare
.get(GregorianCalendar.MILLISECOND))
return false;
return false; }
return areFieldsSet; } @Override
public boolean before(Object arg0)
{
if (!(arg0 instanceof GregorianCalendar))
super.before(arg0);
else
{
GregorianCalendar compare = (GregorianCalendar) arg0;
if (this.get(GregorianCalendar.HOUR_OF_DAY) < compare
.get(GregorianCalendar.HOUR_OF_DAY))
return true;
else if (this.get(GregorianCalendar.HOUR_OF_DAY) > compare
.get(GregorianCalendar.HOUR_OF_DAY))
return false;
if (this.get(GregorianCalendar.MINUTE) < compare
.get(GregorianCalendar.MINUTE))
return true;
else if (this.get(GregorianCalendar.MINUTE) > compare
.get(GregorianCalendar.MINUTE))
return false;
if (this.get(GregorianCalendar.SECOND) < compare
.get(GregorianCalendar.SECOND))
return true;
else if (this.get(GregorianCalendar.SECOND) > compare
.get(GregorianCalendar.SECOND))
return false;
if (this.get(GregorianCalendar.MILLISECOND) < compare
.get(GregorianCalendar.MILLISECOND))
return true;
else if (this.get(GregorianCalendar.MILLISECOND) > compare
.get(GregorianCalendar.MILLISECOND))
return false;
return false;
}
return areFieldsSet; }
}

Answer 3

好麻烦啊，有种很简单的实现方法
DateFormat df=new SimpleDateFormat("HH:mm:ss");
Date d1=new Date();
Date d2=new Date();
String s1=df.format(d1);
String s2=df.format(d2);if(s1.compareTo(s2)>0)
{
  //s1>s2;
}

Answer 4

谢谢楼上,但是DATA类怎么设置时区啊,我之所以不用DATA,就是弄出来总有8个小时误差