String[] str1 = {"08:00", "09:00", "10:00", "18:00", "21:00"};  
String[] str2 = {"12:00", "09:00", "10:00", "11:00"};  
  
//jdk8 stream  
str3 = Stream.concat(Stream.of(str1), Stream.of(str2)) //合并  
.distinct()     //去重  
.sorted()       //排序  
.peek(System.out:println)  
.toArray(String[]::new);```