java中String與StringBuilder的相互轉換

public class jiaodashu
{
public static void main(String[] args)
{
String str = "abcde";
StringBuilder str0 = new StringBuilder;
str0.append(str); //將str轉化為StringBuildeer類型
String str1 = str0.toString(); //將str0轉化為String類型

	str.remove("a");//刪除a
}

}