The example in this article describes how JavaScript implements StringBuffer in Java. Share it with everyone for your reference. The details are as follows:
The implementation of Javascript StringBuffer class is to construct a StringBuffer class through prototype, the code is as follows:
function StringBuffer() {
this.__strings__ = new Array();
}
StringBuffer.prototype.append = function(str) {
this.__strings__.push(str);
};
StringBuffer.prototype.toString = function() {
return this.__strings__.join("");
};
Example:
<html>
<head>
<title>test</title>
<script type="text/javascript">
function StringBuffer() {
this.__strings__ = new Array();
}
StringBuffer.prototype.append = function(str) {
this.__strings__.push(str);
};
StringBuffer.prototype.toString = function() {
return this.__strings__.join("");
};
function testStringBuffer(){
var date1 = new Date();
var str;
for( var i=0; i<10000; i++){
str += "text";
}
var date2 = new Date();
document.writeln("Sting use time:"+ (date2 - date1) +"ms");
//StringBuffer
var date3 = new Date();
var strBuffer = new StringBuffer();
for(i=0; i<10000; i++){
strBuffer.append("text");
}
strBuffer.toString();
var date4 = new Date();
document.writeln("<br/>StringBuffer use time:"+ (date4 - date3) +"ms");
}
</script>
</head>
<body>
<input type="button" value="testStringBuffer" onclick="testStringBuffer()"/>
</body>
</html>I hope this article will be helpful to everyone’s JavaScript programming design.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
