java获取当前月和下个月的第一天和最后一天

Java 
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Calendar cale = Calendar.getInstance();
SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
String firstday, lastday;
// 获取前月的第一天
cale = Calendar.getInstance();
cale.add(Calendar.MONTH, 0);
cale.set(Calendar.DAY_OF_MONTH, 1);
firstday = format.format(cale.getTime());
// 获取前月的最后一天
cale = Calendar.getInstance();
cale.add(Calendar.MONTH, 1);
cale.set(Calendar.DAY_OF_MONTH, 0);
lastday = format.format(cale.getTime());

//下个月的第一天和最后一天
String nextFirstday, nextLastday;
Calendar nextCale = Calendar.getInstance();

nextCale.set(Calendar.MONTH, nextCale.get(Calendar.MONTH) + 1);
nextCale.set(Calendar.DAY_OF_MONTH, 1);
nextFirstday = format.format(nextCale.getTime());

nextCale.set(Calendar.MONTH, nextCale.get(Calendar.MONTH) + 1);
nextCale.set(Calendar.DAY_OF_MONTH, 0);
nextLastday = format.format(nextCale.getTime());