如何在Java中检测if else语句中的所有特殊字符？

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class SpecialCharacterDetection {
    public static void main(String[] args) {
        String ifElseStatement = "if (x == 1) { System.out.println(\"Hello!\"); } else { System.out.println(\"Goodbye!\"); }";

        // 定义正则表达式，匹配特殊字符
        String regex = "[^a-zA-Z0-9\\s]";

        // 创建Pattern对象
        Pattern pattern = Pattern.compile(regex);

        // 创建Matcher对象
        Matcher matcher = pattern.matcher(ifElseStatement);

        // 查找匹配的特殊字符
        while (matcher.find()) {
            String specialCharacter = matcher.group();
            System.out.println("特殊字符：" + specialCharacter);
        }
    }
}