如何将字符串（长度为1）转换为关联的ASCII代码int值（0-255）？

Question

In my code I have A string with length 1, I want to convert it to the int associated with the character value of (extended) ASCII code (0-255).

For example:

"A"->65
"f"->102

Answer 1

int asciiCode = (int)A.charAt(0);

或者，如果您确实需要获取字符串文字“ A”的ascii代码，而不是变量A引用的字符串：

int asciiCode = (int)"A".charAt(0);

Answer 2

You mean char ? All you really need to do is cast the character to an int.

            String a = "A";
            int c = (int) a.charAt(0);
            System.out.println(c);

Outputs 65

Here's a more comprehensive code.

  import java.io.*;
    import java.lang.*;

      public class scrap{
      public static void main(String args[]) throws IOException{
      BufferedReader buff =
      new BufferedReader(new InputStreamReader(System.in));
      System.out.println("Enter the char:");
      String str = buff.readLine();
      for ( int i = 0; i < str.length(); ++i ){
      char c = str.charAt(i);
      int j = (int) c;
      System.out.println("ASCII OF "+c +" = " + j + ".");
      }
      }

  }