Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR,2000);
cal.set(Calendar.MONTH,Calendar.FEBRUARY);
System.out.println(cal.getActualMaximum(Calendar.DATE));
cal.set(Calendar.YEAR,2000);
cal.set(Calendar.MONTH,Calendar.FEBRUARY);
System.out.println(cal.getActualMaximum(Calendar.DATE));
解决方案 »
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