java 取字符的ascii_如何用java获得字符串的ASCII值

您可以使用Java中的`charAt()`和`(int)`方法来获取字符串中每个字符的ASCII值。

例如，以下代码将打印字符串`str`中每个字符的ASCII值：

String str = "Hello, world!";
for (int i = 0; i < str.length(); i++) {
    char c = str.charAt(i);
    int ascii = (int) c;
    System.out.println("ASCII value of " + c + " is " + ascii);
}

输出结果如下：

ASCII value of H is 72
ASCII value of e is 101
ASCII value of l is 108
ASCII value of l is 108
ASCII value of o is 111
ASCII value of , is 44
ASCII value of   is 32
ASCII value of w is 119
ASCII value of o is 111
ASCII value of r is 114
ASCII value of l is 108
ASCII value of d is 100
ASCII value of ! is 33