Get the ASCII Value of a Character in Java – 在Java中获取一个字符的ASCII值

1. Overview

1.概述

In this short tutorial, we’ll see how to get the ASCII value of a character in Java.

在这个简短的教程中，我们将看到如何在Java中获取一个字符的ASCII值。

2. Use Casting

2.使用浇铸

To get the ASCII value of a character, we can simply cast our char as an int:

为了得到一个字符的ASCII值，我们可以简单地将我们的char投成int。

char c = 'a';
System.out.println((int) c);

And here is the output:

这里是输出结果。

97

Remember that char in Java can be a Unicode character. So our character must be an ASCII character to be able to get its correct ASCII numeric value.

请记住，Java中的char可以是一个Unicode字符。所以我们的字符必须是ASCII字符，以便能够得到其正确的ASCII数值。

3. Character Inside a String

3.字符串内的字符

If our char is in a String, we can use the charAt() method to retrieve it:

如果我们的字符在字符串中，我们可以使用charAt()方法来检索它。

String str = "abc";
char c = str.charAt(0);
System.out.println((int) c);

4. Conclusion

4.总结

In summary, we’ve learned how to get the ASCII value of a character in Java.

综上所述，我们已经学会了如何在Java中获取一个字符的ASCII值。