package com.ifenx8.study;
public class Demo_String {
/**
A:String -- StringBuffer
* a:通过构造方法
* b:通过append()方法
B:StringBuffer -- String
* a:通过构造方法
* b:通过toString()方法
* c:通过subString(0,length);
*/
public static void main(String[] args) {
demo();//string转换成stringbuffer
demo2();//把stringbuffer转成string
}
public static void demo2() {
//把stringbuffer转成string
StringBuilder sb = new StringBuilder("ifenx8");
String s1 = new String(sb);//通过构造方法
System.out.println(s1);
String s2 = sb.toString();//通过toString()方法
System.out.println(s2);
String s3 = sb.substring(0,sb.length());//通过subString(0,length);
System.out.println(s3);
}
public static void demo() {
//string转换成stringbuffer
StringBuilder sb = new StringBuilder("ifenx8");//把string字符串转换成stringbuffer
System.out.println(sb);
StringBuilder sb1 = new StringBuilder();
sb1.append("ifenx8.com");
System.out.println(sb1);
}
}