Java字串加密

package 字串加密;

import javax.swing.JOptionPane;
public class Password {
    public static void main(String args[])
    {
        String password;
        password = JOptionPane.showInputDialog("请输入要加密或者要破解的字符串：");
        
        String output;
        output = "字符串："+password;
        char[] c = new char[password.length()];
        password.getChars(0, password.length(), c,0);
        
        //加密
        for(int i=0;i<password.length();i++)  
        {
            if(c[i]==‘x‘)
                c[i]=‘a‘;
            else if(c[i]==‘y‘)
                c[i]=‘b‘;
            else if(c[i]==‘z‘)
                c[i]=‘c‘;
            else if (c[i] == ‘ ‘)
                c[i]=c[i];
            else
                c[i]+=3;
        }
        output=new String(c);
        
        //解密 
        char[] d = new char[password.length()];
        password.getChars(0, password.length(), d,0);
        for(int i=0;i<password.length();i++)
        {
            if(d[i]==‘c‘)
                d[i]=‘z‘;
            else if(d[i]==‘b‘)
                d[i]=‘y‘;
            else if(d[i]==‘a‘)
                d[i]=‘x‘;
            else if(d[i] == ‘ ‘)
                d[i]=d[i];
            else
                d[i]-=3;
        }
        String o=new String(d);
        
        output +="\n\n解密后的字符串是:"+o;//定义输出格式
        
        JOptionPane.showMessageDialog(
                null,"加密后的字符串是："+output,"字符串"+password,
                JOptionPane.PLAIN_MESSAGE);
    
        
        System.exit(0);
        
    }
}