### 字符串与其它数据类型之间的转换

        //字符串与int类型之间的转换
        String str = "123";
        //string->int
        int a = Integer.parseInt(str);
        System.out.println(a);
        //int->string
        String str1 = String.valueOf(a);
        String str2 = Integer.toString(a);//valueOf的方法返回的还是Integer.toString的方法
        System.out.println(str1);
        System.out.println(str2);

        //string -> char
        char[] ch = str.toCharArray();
        System.out.println(ch);
        //char->string
        String strrr =new String(ch);
        System.out.println(strrr);
        //string->byte[]
        byte[] by = str.getBytes();
        System.out.println(Arrays.toString(by));