Calendar cr =new Calendar();

Calendar cr =new Calendar();
为什么这样编译通不过了
该怎么改了

看看api
public [color=red]abstract [/color]class Calendarextends Objectimplements Serializable, Cloneable, Comparable

它是个抽象类，当然不能实例化

应该这样

Calendar rightNow = Calendar.getInstance();

[size=x-large][color=red]Calendar cr = Calendar.getInstance();[/color] [/size]
抽象类来的