java - Unicode 字符 Java

Question

这个问题已经有答案了:

How to write unicode cross symbol in Java? (4 个回答)

已关闭 7 年前。

我不能在java中使用unicode字符。我把树 unicode 放进去了，它只是以一个小盒子和一个 4 的形式出现。它在一个小程序中，我把代码放在 public void Paint(Graphics g) 中无论如何，代码如下

    g.drawString("\u1F334",150,150);

Answer 1

来自JLS 3.3 :

A compiler for the Java programming language ("Java compiler") first recognizes Unicode escapes in its input, translating the ASCII characters \u followed by four hexadecimal digits to the UTF-16 code unit (§3.1) for the indicated hexadecimal value, and passing all other characters unchanged. Representing supplementary characters requires two consecutive Unicode escapes.

(强调)

具体来说，您需要 UTF-16 BE(大端)编码。对于棕榈树，序列(如 on the page you linked 所示)是 "\uD83C\uDF34"。