Compare whether two lists are equal, the length and content are equal, and the List Length

Compare whether two lists are equal, the length and content are equal, and the List Length

/**
* Duplicate data exists in the list, and the order is different.
*/
Import java. util. arrayList; import java. util. collections; import java. util. list; public class CompareList {public static void main (String [] args) {List <String> list1 = new ArrayList <String> (); list <String> list2 = new ArrayList <String> (); list1.add ("zhang"); list1.add ("li"); list1.add ("zhangs "); list1.add ("zhangs"); list2.add ("li"); list2.add ("zhangs"); list2.add ("zhang"); list2.add ("zhangs "); // list for sorting Collections. sort (list1); Collections. sort (list2 );
// Output the comparison result System. out. println (list1.equals (list2 ));}}

Second:

/**
* Duplicate data exists in the list, and the order is different.
*/
Import java. util. arrayList; import java. util. comparator; import java. util. list; public class CompareList {public static void main (String [] args) {List <String> list1 = new ArrayList <String> (); list <String> list2 = new ArrayList <String> (); list1.add ("zhang"); list1.add ("li"); list1.add ("zhangs "); list1.add ("zhangs"); list2.add ("li"); list2.add ("zhangs"); list2.add ("zhangs"); list2.add ("zhang ");
List1.sort (new Comparator <String> () {@ Override public int compare (String o1, String o2) {return o1.compareTo (o2 );}}); list2.sort (new Comparator <String> () {@ Override public int compare (String o1, String o2) {return o1.compareTo (o2) ;}}); if (list1.size () = list2.size () & list1.containsAll (list2) {System. out. println ("true ");}}}