Listar el contenido de la salida, el método toString de reescritura

import java.util.ArrayList;
import java.util.List;

public class ListToString {

	public static void main(String[] args) {
		
		List<String> hello = new ArrayList();
		hello.add("adsfasd");
		hello.add("adsfasd");
		hello.add("adsfasd");
		hello.add("adsfasd");
		System.out.println(new ListToString().toString(hello));//这里通过对象调用
	}
	
	public String toString(List<String> list) {
		StringBuilder strback = new StringBuilder();
		for(String obj: list) {
			strback.append(obj);
		}
		return strback.toString();
	}
}