list轉數組，數組轉list

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

public class Test {
	public static void main(String[] args) {
		
		List<String> list = new ArrayList<String>();
		list.add("a");
		list.add("b");
		list.add("c");
		
		//list轉數組
		String[] array = (String[]) list.toArray(new String[list.size()]);
		
		//數組轉字符串
		System.out.println(Arrays.toString(array));
		
		//數組轉list
		List<String> list2 = new ArrayList<String>();
		list2 = Arrays.asList(array);
		System.out.println(list2.toString());
	}

}