next和nextOrSame，previous和previousOrSame區別

今天是星期五，2020-06-19

調用nextOrSame和previousOrSame返回都是今天，2020-06-19

調用previous，返回2020-06-12

調用next，返回2020-06-26

 

//上個星期五的日期  如果今天是星期五，則返回上週五的日期
LocalDate previousSaturdayInThisMonth = today.with(TemporalAdjusters.previous(DayOfWeek.FRIDAY));

//(往前包括當天)最近星期五的日期  如果今天是星期五，則返回今天日期
LocalDate previousOrSameSaturdayInThisMonth = today.with(TemporalAdjusters.previousOrSame(DayOfWeek.FRIDAY));

//下個星期五的日期  如果今天是星期五，則返回下週五的日期
LocalDate nextSaturdayInThisMonth = today.with(TemporalAdjusters.next(DayOfWeek.FRIDAY));

//(往後包括當天)最近星期五的日期  如果今天是星期五，則返回今天日期
LocalDate nextOrSameSaturdayInThisMonth = today.with(TemporalAdjusters.nextOrSame(DayOfWeek.FRIDAY));