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[Java教程]JavaScript String(字符串)对象 实例


返回字符串的长度:

<html><body><script type="text/javascript">var txt="Hello World!"document.write(txt.length)</script></body></html>

 

为字符串添加样式:

<html><body><script type="text/javascript">var txt="Hello World!"document.write("<p>Big: " + txt.big() + "</p>")document.write("<p>Small: " + txt.small() + "</p>")document.write("<p>Bold: " + txt.bold() + "</p>")document.write("<p>Italic: " + txt.italics() + "</p>")document.write("<p>Blink: " + txt.blink() + " (does not work in IE)</p>")document.write("<p>Fixed: " + txt.fixed() + "</p>")document.write("<p>Strike: " + txt.strike() + "</p>")document.write("<p>Fontcolor: " + txt.fontcolor("Red") + "</p>")document.write("<p>Fontsize: " + txt.fontsize(16) + "</p>")document.write("<p>Lowercase: " + txt.toLowerCase() + "</p>")document.write("<p>Uppercase: " + txt.toUpperCase() + "</p>")document.write("<p>Subscript: " + txt.sub() + "</p>")document.write("<p>Superscript: " + txt.sup() + "</p>")document.write("<p>Link: " + txt.link("http://www.w3school.com.cn") + "</p>")</script></body></html>

 

返回字符串中指定文本首次出现的位置 - indexOf()方法:

<html><body><script type="text/javascript">var str="Hello world!"document.write(str.indexOf("Hello") + "<br />")document.write(str.indexOf("World") + "<br />")document.write(str.indexOf("world"))</script></body></html>

效果如下:

查找字符串中特定的字符,若找到,则返回该字符 - match() 方法:

<html><body><script type="text/javascript">var str="Hello world!"document.write(str.match("world") + "<br />")document.write(str.match("World") + "<br />")document.write(str.match("worlld") + "<br />")document.write(str.match("world!"))</script></body></html>

效果如下:

 

替换字符串中的字符 - replace():

<html><body><script type="text/javascript">var str="Visit Microsoft!"document.write(str.replace(/Microsoft/,"W3School"))</script></body></html>

效果如下: