日期:2014-05-16 浏览次数:20464 次
1.Date对象:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title> New Document </title> <meta name="Generator" content="EditPlus"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <script type="text/javascript"> var date = new Date(); document.write(date); </script> </head> <body> </body> </html>
运行结果:
我们来改变一下输出的方式:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title> New Document </title> <meta name="Generator" content="EditPlus"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <script type="text/javascript"> var date = new Date(); document.write(date.getFullYear()+"年"+date.getMonth()+"月"+date.getDate()+"日"); </script> </head> <body> </body> </html>
运行结果:
明明是9月,却显示的是8月,说明getMonth是从下标0开始的,所以要加1:
document.write(date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日");
这样就会输出正确的结果了。
2.String对象:
2.1
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title> New Document </title> <meta name="Generator" content="EditPlus"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <script type="text/javascript"> var str1 = new String("niujiabin"); var str2 = "niujiabin"; alert(str1==str2); </script> </head> <body> </body> </html>
结果是true,这里与java是有区别的,并不存在引用,没有equals方法。
2.2字符串连接
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script type="text/javascript">
var str1 = new String("niujiabin");
var str2 = "niujiabin";
// alert(str1==str2);
//字符串的连接
var str3 = str2.concat("maybe","gossip");
alert(str3);
</script>
</hea