this is code for send encryption message between client and server program on java

sender and receiver program

#### sender code:
******************************************************************************************************************
package encryptionmessage;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import javax.swing.JOptionPane;
import javax.xml.bind.DatatypeConverter;
import java.lang.String;
 
public class sender {

public static void main(String[] args)throws IOException {
    int Port =Integer.parseInt(JOptionPane.showInputDialog("please create password"));
String IP = JOptionPane.showInputDialog("Input Your IP");
Socket sock=new Socket("192.168.17",123456);
DataInputStream in= new DataInputStream(sock.getInputStream());
System.out.println(in.readUTF());
DataOutputStream out =new DataOutputStream(sock.getOutputStream());
out.writeUTF("message sending");
}
 public static void main(String[] args) throws Exception {
        String password = JOptionPane.showInputDialog("Input the key: ");
        String message = JOptionPane.showInputDialog("Input Your message: ");
        String encryptionMessage =  encryptAES(messageText, keyEncryption);  
        JOptionPane.showMessageDialog(null,messageEncrypted);
 }
  private static byte[] convertToByte(String kunci) {
        byte[] array_byte = new byte[20];
        int i = 0;
        while (i < kunci.length()) {
            array_byte[i] = (byte) kunci.charAt(i);
            i++; }
        if (i < 20) {
            while (i < 20) {
                array_byte[i] = (byte) i;
                i++;
            } }
        return array_byte;
 }
 sock.close();
      
    }
}
************************************************************************************************
#### receiver code:
************************************************************************************************
package encryptionmessage;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import javax.swing.JOptionPane;
import javax.xml.bind.DatatypeConverter;
import java.lang.String;
 
public class receiver {
    public static void main(String[] args) throws IOException{
        int Port =Integer.parseInt(JOptionPane.showInputDialog("Input the passord"));
String IP = JOptionPane.showInputDialog("Input Your IP");
       ServerSocket serverSock=new ServerSocket(123456);
       Socket Sock=serverSock .accept();
       DataOutputStream out =new DataOutputStream(Sock.getOutputStream());
          
    }
    public static String decryptAES(String encryptedData, String encryptionKey)
            throws Exception {
        Cipher c = Cipher.getInstance("AES");
        Key key = generateKey(encryptionMessage);
        c.init(Cipher.DECRYPT_MODE, key);

        byte[] decordedValue = DatatypeConverter
                .parseBase64Binary(encryptedData);
        byte[] decValue = c.doFinal(decordedValue);
        String decryptedValue = new String(decValue);
        return decryptedValue;
        JOptionPane.showMessageDialog(null,encryptionMessage);
        JOptionPane.showMessageDialog(null,message);
        out.writeUTF("you have message");
       DataInputStream in= new DataInputStream(Sock.getInputStream());
        System.out.println(in.readUTF());
        Sock.close(); 
      
    }
}