To sort the collection elements Collection class gives us the methods. In case of Set collection, we have TreeSet that can use to set the Set elements. We can sort elements of type String objects, Wrapper class objects and User-defined class objects.

Method that use for sorting

public void sort(List myList) 

ArrayListmyList=new ArrayList(); 

myList.add("John"); 

myList.add("Adam"); 

myList.add("Smith"); 

myList.add("Mike");   


Collections.sort(myList); 

Iterator iterator= myList.iterator(); 

while(iterator.hasNext()){ 

System.out.println(iterator.next()); 

 }   

O/P: 
Adam 
John 
Mike 
Smith 

Another Example

ArrayList myList =new ArrayList(); 

myList.add(Integer.valueOf(1005)); 

myList.add(Integer.valueOf(1002)); 

al.add(1003); 

Collections.sort(myList);   


Iterator iterator = myList.iterator(); 

while(iterator.hasNext()){ 

System.out.println(iterator.next()); 

 } 

} 

} 

O/P: 
1002 
1003 
1005