js增強for循環 和Java中的增強for循環的區別

js中獲得的是下標索引

var str=["hello","js","for"];
            for (var index in str) {
                console.log(index);//0  1  2
            }

 

Java中獲得的是值

List str={"hello","js","for"};
            for (var index in str) {
               System.out.println(index);// hello  js  for
            }