一、String轉化為StringBuffer類

方法一：使用StringBuffer類的構造方法，public StringBuffer(String str) public class Person { public static void main(String[] args) { String str ="hello world"; StringBuffer buf = new StringBuffer(); buf.append(str); System.out.PRintln(buf); } } 方法二:利用StringBuffer類的append()方法 public class Person { public static void main(String[] args) { String str ="hello world"; StringBuffer buf = new StringBuffer(str); System.out.println(buf); } }

二、StringBuffer轉化為String

利用StringBuffer類的toString()方法完成 public class Person { public static void main(String[] args) { StringBuffer buf=new StringBuffer(); buf.append("hello world"); String str = buf.toString(); System.out.println(str); } }