Question

How to loop over ArrayList in Java

Answer 1

import java.util.ArrayList;
 
public class MyClass {
    public static void main(String args[]) {
        ArrayList<Integer> al = new ArrayList<>();
        
        al.add(5);
        al.add(2);
        al.add(9);
        al.add(7);

        for (int n : al) {
            System.out.println(n);
        }
    }
}
 
 
 
 
/*
run:
 
5
2
9
7
 
*/

 

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Answer 2

import java.util.ArrayList;
 
public class MyClass {
    public static void main(String args[]) {
        ArrayList<Integer> al = new ArrayList<>();
        
        al.add(5);
        al.add(2);
        al.add(9);
        al.add(7);

        for (int i = 0; i < al.size(); i++) {
            System.out.println(al.get(i));
        }
    }
}
 
 
 
 
/*
run:
 
5
2
9
7
 
*/

 

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