java语言基础(56)——String和StringBuffer互转

class StringDemo
{
public static void main(String[] args){
//String 转 StringBuffer
String s = "hello";
// 方法1
StringBuffer sb = new StringBuffer(s);
// 方法2
StringBuffer sbff = new StringBuffer();
sbff.append(s);

System.out.println(sb); // hello
System.out.println(sbff); // hello

//StringBuffer 转 String
StringBuffer buffer = new StringBuffer("world");
// 方法1
String str = new String(buffer);
// 方法2
String str1 = buffer.toString();

System.out.println(str); // world
System.out.println(str1);// world
}
}