ArrayList<String> to String Array in Java

集合Transfer 数组is also a common operation.

Look at the code

import java.util.ArrayList;
public class Test {
    
    
    public static void main(String[] args) {
    
    
        ArrayList<String> res = new ArrayList<>();
        res.add("abc");
        res.add("bcd");
        res.add("cde");
		// 要定义数组的长度
        String str[] = res.toArray(new String[res.size()]);
        for (String s : str) {
    
    
            System.out.println(s);
        }
    }
}

operation result