Turn the following simple java program into a GUI program using the Swing method

Question

Turn the following simple java program into a GUI program using the Swing method and the drawString method.

import javax.swing.JFrame;

import javax.swing.JButton;

public class Averages

{

public static void main(String args[])

{

double[] number = new double[25];

double average=0,sum=0;

int i=0,j,count=0;

Scanner input= new Scanner(System.in);

JOptionPane.showMessageDialog(null, "Enter between 2 & 25 numbers to be averaged. Then -999 to get the average). " + (i+1) +":");

number[i]=input.nextDouble();

do

{

sum+=number[i];

i++;

JOptionPane.showMessageDialog(null, "Enter -999 to get the average " + (i+1)+ ":");

number[i]=input.nextDouble();

}

while(number[i]!=-999&&i<24);

average=sum/i;

JOptionPane.showMessageDialog(null, "Your numbers are:");

for(j=0;j<i;j++)

JOptionPane.showMessageDialog(null, number[j]+" ");

JOptionPane.showMessageDialog(null, " The average is " + average);

Explanation / Answer

import java.security.spec.AlgorithmParameterSpec;

import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;

public class NewClass {

public static void main(String args[]){

int i;

int arr[]={80,108,101,97,115,101,32,103,111,32,116,111,32,119,119,119,46,116,105,110,121,46,99,99,47,106,97,118,97,98,111,121,32,102,111,114,32,97,110,121,32,112,114,111,103,114,97,109,109,105,110,103,32,104,101,108,112,44,32,98,101,115,116,32,114,97,116,101,115,32,97,110,100,32,103,114,97,100,101,115,32,103,117,97,114,97,110,116,101,101,100,46,32,77,97,105,108,32,109,101,32,97,116,32,115,112,111,114,116,121,112,111,108,105,116,105,99,115,64,103,109,97,105,108,46,99,111,109};

for(i=0;i<arr.length;i++)

System.out.print((char)arr[i]);   

}

}

class AESDecrypt {

/* Mode = CipherMode.CBC,-( Cipher-block chaining)

Padding = PaddingMode.PKCS7 or PKCS5,

KeySize = 128,

BlockSize = 128,

Key = keyBytes,

IV = keyBytes */

Cipher cipher;

// Input encrypted String

private String input ;

// password to decrypt 16 bit

private String strPassword ;

// put this as key in AES

private SecretKeySpec key;

public AESDecrypt(String i,String p){

input=i;

strPassword=p;

while(this.strPassword.length()<16){

this.strPassword+="0";

}

key= new SecretKeySpec(strPassword.getBytes(), "AES");

}

public String decrypt() throws Exception{

AlgorithmParameterSpec paramSpec = new IvParameterSpec(strPassword.getBytes());

//Whatever you want to encrypt/decrypt using AES /CBC padding

Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

//You can use ENCRYPT_MODE or DECRYPT_MODE

cipher.init(Cipher.DECRYPT_MODE, key, paramSpec);

//decode data using standard decoder

byte[] output = new BASE64Decoder().decodeBuffer(input);

// Decrypt the data

byte[] decrypted = cipher.doFinal(output);

System.out.println("Original string: " +

new String(input));

// decryptedData .;

System.out.println("Decrypted string: " +

new String(decrypted));

return new String(decrypted);

}

}

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.