JAVAJDK -Calendar 遇到的 一个坑

Posted 2020-07-01 飞鱼

Calendar是JDK 1.1增加的类

最近使用了下Calendar发现几个很让人抓狂的问题

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源码：

public final static int SUNDAY = 1;

public final static int MONDAY = 2;

public final static int TUESDAY = 3;

public final static int WEDNESDAY = 4;

public final static int THURSDAY = 5;

public final static int FRIDAY = 6;

public final static int SATURDAY = 7;

你发现了么。是的这是真的，星期一（MONDAY） 对应的值为２，不是一，其他的值也是都向后措了１位数字。

 

同样的，源码：

public final static int JANUARY = 0; 　

public final static int FEBRUARY = 1; 

public final static int MARCH = 2;

public final static int APRIL = 3;

public final static int MAY = 4;

public final static int JUNE = 5;

public final static int JULY = 6;

public final static int AUGUST = 7;

public final static int SEPTEMBER = 8;

public final static int OCTOBER = 9;

public final static int NOVEMBER = 10;

public final static int DECEMBER = 11;

没错，月份也有相同的问题。一不小心就会把时间处理错