Question

How to resize a vector in Java

Answer 1

import java.util.Vector;

public class ResizeVector {
    public static void main(String[] args) {
        Vector<Integer> vec = new Vector<>();
        vec.add(1);
        vec.add(2);
        vec.add(3);
        vec.add(4);

        // Resize up to 5 elements, filling with zeros
        while (vec.size() < 5) {
            vec.add(88);
        }
        
        System.out.println(vec); 

        // Resize down to 2 elements
        while (vec.size() > 2) {
            vec.remove(vec.size() - 1);
        }

        System.out.println(vec); 
    }
}



/*
run:

[1, 2, 3, 4, 88]
[1, 2]

*/

 

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