1、ArrayList 转换为 String[] :
// ArrayList转String[]
ArrayList list = new ArrayList();
list.add(“a”);
list.add(“b”);
String[] words = (String[])(list.toArray(new String[ list.size()]));
2、String[] 转换为 ArrayList :
String[] array =new String[] { “a”, “b” };
ArrayList list = new ArrayList(array);
3、ArrayList 转换为 String :
ArrayList list = new ArrayList();
list.add(“a”);
list.add(“b”);
String str= String.Join(“,”, (String[])list.ToArray());
4、String 转换为 ArrayList :
String str=”1,2,3,4,5”;
ArrayList b = new ArrayList( str.split(‘,’) ) ;
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