如何在Java中检查字符串是否包含回车符(CR)或换行符(LF)

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

public class CheckNewLine {
    public static void main(String[] args) {
        String input = "This is a string with\na new line.";
        
        // 使用正则表达式匹配回车符或换行符
        Pattern pattern = Pattern.compile("[\\r\\n]");
        Matcher matcher = pattern.matcher(input);
        
        if (matcher.find()) {
            System.out.println("字符串包含回车符或换行符");
        } else {
            System.out.println("字符串不包含回车符或换行符");
        }
    }
}