Question

How to sort a given ArrayList in descending order with Java

Answer 1

import java.util.ArrayList;
import java.util.Collections;
import java.util.Arrays;

public class MyClass {
    public static void main(String args[]) {
        ArrayList<Integer> al = new ArrayList<>(Arrays.asList(40, 89, 23, 99, 89, 75, 30, 12)); 
  
        System.out.println(al); 
           
        Collections.sort(al, Collections.reverseOrder());
        
        System.out.println(al); 
   
    }
}
     
     
   
     
     
/*
run:
     
[40, 89, 23, 99, 89, 75, 30, 12]
[99, 89, 89, 75, 40, 30, 23, 12]

*/

 

 

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