Question

How set value at specific index in ArrayList with Java

Answer 1

import java.util.*; 
  
public class MyClass {
    public static void main(String args[]) {
        ArrayList<Integer> al = new ArrayList<Integer>(Arrays.asList(5, 2, 9, 7, 1)); 
 
        al.set(0, 300);

        for (Integer n : al) {
            System.out.println(n);
        }
    }
}
  
  
  
  
/*
run:
  
300
2
9
7
1
  
*/

 

70+ SQL courses for beginners and professionals