JavaScript--字符、日期对象、数组

JavaScript基础操作示例

最新推荐文章于 2025-02-28 19:58:08 发布

翻译最新推荐文章于 2025-02-28 19:58:08 发布 · 404 阅读

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JavaScript字符串对象</title>
</head>
<body>
<script type="text/javascript">
	var s1="实例化字符串方式一";
	var s2=new String("实例化字符串abc方式二");
	document.write(s1+"<br/>");
	document.write(s2+"<br/>");
	document.write(s2+"的长度是："+s2.length+"<br/>");
	document.write(s2.indexOf("abc",0)+"<br/>");
	document.write(s2.replace("abc", "java1234")+"<br/>");
	
	
	var date=new Date();
	document.write(date.getTime()+"<br/>");
	document.write(date.getFullYear()+"<br/>");
	document.write((date.getMonth()+1)+"<br/>");
	document.write(date.getDate()+"<br/>");
	var today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日";
	document.write(today+"<br/>");
	document.write(date.getHours()+"<br/>");
	document.write(date.getMinutes()+"<br/>");
	document.write(date.getSeconds()+"<br/>");
	today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日  "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds();
	document.write(today+"<br/>");
	var day=date.getDay();
	var week;
	switch(day){
	case 0:week="星期日";break;
	case 1:week="星期一";break;
	case 2:week="星期二";break;
	case 3:week="星期三";break;
	case 4:week="星期四";break;
	case 5:week="星期五";break;
	case 6:week="星期六";break;
	}
	document.write(week+"<br/>");
	today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日  "+week+" "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds();
	document.write(today+"<br/>");
	
	
	var arr=new Array();
	var arr2=new Array(3);
	arr[0]="jack";
	arr[1]="marry";
	arr[2]="tom";
	arr[3]="lucy";
	arr[4]="june";
	
	arr2[0]=2;
	arr2[1]=1;
	arr2[2]=5;
	//数组遍历
	for(var i=0;i<arr.length;i++){
		document.write(arr[i]+"<br/>");
	}
	document.write("<hr/>");
	var o;
	for(o in arr2){
		document.write(arr2[o]+"<br/>");
	}
	//数组元素排序
	document.write("<hr/>");
	document.write("sort()"+arr.sort()+"<br/>");
	document.write("sort()"+arr2.sort()+"<br/>");
	document.write("<hr/>");
	//合成字符数组元素
	document.write("join()"+arr.join()+"<br/>");
	document.write("join()"+arr2.join(".")+"<br/>");
	document.write("<hr/>");
	//合并数组元素
	document.write("concat()"+arr.concat(arr2)+"<br/>");
	document.write("<hr/>");
	//颠倒数组元素
	document.write("reverse()"+arr.reverse()+"<br/>");
	</script>
</body>
</html>