java各類類型轉換

一、String與char、char[]轉換：

      String str = "hello world!";

      char[] ch = str.toCharArray();//String轉char[]

      String str1 = String.valueOf(ch);//char[]轉String

      String str2 = new String(ch);//char[]轉String

      char ca = str.charAt(0);//String轉char

      String str3 = ca + "";//char轉String

 

二、String與byte[]轉換：

      String str = "hello world!哈哈";
      byte[] bt1 = str.getBytes();//String轉byte[]
      byte[] bt2 = str.getBytes("utf-8");//String使用指定編碼轉byte[]

      String str1 = new String(bt1);//byte[]轉String
      String str2 = new String(bt2,"utf-8");//byte[]使用指定指定編碼轉String

後續更新中......