JavaScript中字符串String对象

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>JavaScript string对象</title> 
</head>
<body>

<script>
var name = new String('devZhang');
var job = "devZhang is an iOS developer !";
document.write("创建string对象的两种方法：<br> 1、" + name + "<br> 2、" + job + "<br>");	

var nameLength = name.length
document.write("<br>字符串" + name + "的长度是：" + nameLength + "<br>");

var indexChar = name.indexOf ('Z')
document.write("<br> 字符'Z'在字符串" + name + "中的位置：" + indexChar + "<br>");
	
var charIndex = name.charAt (1)
document.write("<br>字符串" + name + "中位置1的字符是：" + charIndex + "<br>");
	
var namejob = name.concat(" is an ").concat(job)
document.write("<br>字符串拼接：" + namejob + "<br>")

var nameUpper = name.toUpperCase()
document.write("<br>字符串转换成大写：" + nameUpper + "<br>")

var nameLower = name.toLowerCase()
document.write("<br>字符串转换成小写：" + nameLower + "<br>")

var jobTrim = job.trim()
document.write("<br>字符串去掉两边空格：" + jobTrim + "<br>")

var jobReplace = job.replace("developer", "Developer")
document.write("<br>字符串替换：" + jobReplace + "<br>")

var jobSearch = job.search("eve")
document.write("<br>字符串查找子字符串所在位置：" + jobSearch + "<br>")

var jobSlice = job.slice(3,7)
document.write("<br>获取字符串中指定开始和结束位置的子字符串：" + jobSlice + "<br>")

var jobSplit = job.split(" ")
document.write("<br>子符串按指定格式字符串拆分：" + jobSplit + "<br>")
	
var jobSub = job.substr(1,3)
document.write("<br>获取字符串中指定位置和长度的子字符串：" + jobSub + "<br>")

</script>

</body>
</html>

创建string对象的两种方法：
1、devZhang
2、devZhang is an iOS developer !

字符串devZhang的长度是：8

字符'Z'在字符串devZhang中的位置：3

字符串devZhang中位置1的字符是：e

字符串拼接：devZhang is an devZhang is an iOS developer !

字符串转换成大写：DEVZHANG

字符串转换成小写：devzhang

字符串去掉两边空格：devZhang is an iOS developer !

字符串替换：devZhang is an iOS Developer !

字符串查找子字符串所在位置：20

获取字符串中指定开始和结束位置的子字符串：Zhan

子符串按指定格式字符串拆分：devZhang,is,an,iOS,developer,!

获取字符串中指定位置和长度的子字符串：evZ

JavaScript中字符串String对象

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