java实现凯撒加密

可以使用Java实现凯撒加密的方法如下：

public class CaesarCipher {
    public static String encrypt(String message, int shift) {
        StringBuilder result = new StringBuilder();
        
        for (int i = 0; i < message.length(); i++) {
            char ch = message.charAt(i);
            
            if (Character.isLetter(ch)) {
                char encryptedChar = (char) (((ch - 'a') + shift) % 26 + 'a');
                result.append(encryptedChar);
            } else {
                result.append(ch);
            }
        }
        
        return result.toString();
    }
    
    public static void main(String[] args) {
        String message = "hello world";
        int shift = 3;
        
        String encryptedMessage = encrypt(message, shift);
        System.out.println("Encrypted message: " + encryptedMessage);
    }
}

运行上述代码，输出结果为：“khoor zruog”