使用前提是使用jdk1.8

package com.neutron.string;

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

public class String2List {

	public static void main(String[] args) {
		// 字串List轉化為String
		List<String> strs = new ArrayList<String>();
		strs.add("first");
		strs.add("second");
		strs.add("third");
		strs.add("forth");
		String result = String.join(",", strs);
		System.out.println("first,second,third,forth".equals(result));
		
		// 字串使用特定字元進行拼接
		String result2 = String.join("-", "01", "02", "03", "04");
		System.out.println("01-02-03-04".equals(result2));
	}

}