public static void main(String[] args) {
Double d1 = 4.0;
Double d2 = 3.0;
System.out.println(d1.compareTo(d2));
System.out.println("-----------------------------------------");
String[] arrString = new String[]{"qwe","Afd","cfd","123"};
Arrays.sort(arrString);
for(int i=0;i<arrString.length;i++){
System.out.println(arrString[i]);
}
System.out.println("-----------------------------------------");
List<String> list = new ArrayList<String>();
list.add("123");
list.add("asd");
list.add("wed");
list.add("QWEW");
Collections.sort(list);
for(int i=0;i<list.size();i++){
System.out.println(lis