#Java - Code Snippets for '#Collections.sort'

#Java - Code Snippets for '#Collections.sort' - 4 code snippet(s) found

Sample 1. Sorting an arraylist using Collections.sort

List<String> myList = new ArrayList<String>();

myList.add("D");

myList.add("A");

myList.add("B");

myList.add("C");

myList.add("E");



System.out.println(myList); // Unsorted



Collections.sort(myList);



System.out.println(myList); // Sorted

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Sample 2. Sort a List using Collections.sort and comparator

Collections.sort(listClassInfo,new Comparator<ClassInfoBean>(){

            public int compare(ClassInfoBean s1,ClassInfoBean s2){

                  if(s1.name.compareTo(s2.name) < 0){

                     return -1;

                  } else {

                     return 1;

                  }

                  

}});

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Sample 3. Sort Entries of a Map by Value

public class BuggyBread {

   public static void main(String args[]) {

      Map<String,Integer> wordLength = new HashMap();

      

      String str = "We are what we repeatedly do; excellence, then, is not an act but a habit";

      

      for(String word: str.split(" ")){

            wordLength.put(word, word.length());

      }

      

      List<Map.Entry<String, Integer>> list = new LinkedList<Map.Entry<String, Integer>>( wordLength.entrySet() );

      

      Collections.sort( list, new Comparator<Map.Entry<String, Integer>>()

        {

            public int compare( Map.Entry<String, Integer> o1, Map.Entry<String, Integer> o2 )

            {

                return (o1.getValue()).compareTo( o2.getValue() ) * -1;

            }

        } );

      

      System.out.println(list);

      

   }

}

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Sample 4. Sort list of strings using Lambda expressions

List<String> cities = (List<String>)Arrays.asList("Seattle","Atlanta","New York");

Collections.sort(cities,(x, y) -> x.compareTo(y));

System.out.println(cities);

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