char的默认值是多少？ [英] what's the default value of char?

问题描述

  char c ='\\\'; 
  

当我打印c时，它在命令行窗口中显示'a'。

那么char类型字段的默认值是什么？

有人说'\\\'在unicode中表示null;是

解决方案

char 属性的默认值确实是'\\\'（空字符），如Java语言规范中的§4.12.5变量的初始值。

我的系统，行 System.out.println（'\\\'）; 打印一个小方块，这意味着它不是一个可打印的字符。 >

char c = '\u0000';

When I print c, it shows 'a' in the command line window.

So what's the default value of a char type field?

Someone said '\u0000' means null in unicode; is that right?

解决方案

The default value of a char attribute is indeed '\u0000' (the null character) as stated in the Java Language Specification, section §4.12.5 Initial Values of Variables .

In my system, the line System.out.println('\u0000'); prints a little square, meaning that it's not a printable character - as expected.

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