js增强for循环 和Java中的增强for循环的区别

js中获得的是下标索引

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

 

Java中获得的是值

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