How to sort an ArrayList in Java

Question

I have a class named Fruit  I am creating a list of this class and adding each fruit in the list  I want to sort this list based on the order of fruit name   public class Fruit       private String fruitName      private String fruitDesc      private int quantity       public String getFruitName             return fruitName            public void setFruitName String fruitName            this fruitName   fruitName            public String getFruitDesc             return fruitDesc            public void setFruitDesc String fruitDesc            this fruitDesc   fruitDesc            public int getQuantity             return quantity            public void setQuantity int quantity            this quantity   quantity            and I am creating its list using for loop  List lt Fruit gt   fruits  new ArrayList lt Fruit gt      Fruit fruit  for int i 0 i lt 100 i         fruit   new fruit       fruit setname          fruits add fruit       and I need to sort this arrayList using the fruit name of each object in the list  how

User · Answer

Implement Comparable interface to Fruit   public class Fruit implements Comparable lt Fruit gt      It implements the method   Override     public int compareTo Fruit fruit              write code here for compare name         Then do call sort method  Collections sort fruitList

User · Answer

Try BeanComparator from Apache Commons   import org apache commons beanutils BeanComparator    BeanComparator fieldComparator   new BeanComparator  fruitName    Collections sort fruits  fieldComparator

User · Answer

Use a Comparator like this   List lt Fruit gt  fruits  new ArrayList lt Fruit gt      Fruit fruit  for int i   0  i  lt  100  i        fruit   new Fruit      fruit setname         fruits add fruit         Sorting Collections sort fruits  new Comparator lt Fruit gt               Override         public int compare Fruit fruit2  Fruit fruit1                         return  fruit1 fruitName compareTo fruit2 fruitName                       Now your fruits list is sorted based on fruitName

[java] How to sort an ArrayList in Java

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