السلام عليكم ورحمة الله لو سمحتو حد بقدر يساعدني كيف اعمل مسج بوكس اذا كانت البيز مش 2 يعطي مسج خطأ او مش 8 او مش 16 واحط بوتون للexit ليخرج من البرنامج انا رح اضيف البرنامج وبليز حد يعدل عليه
import javax.swing.*;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.text.*;
public class Mod_Con extends Applet implements ActionListener
{
// globals, buttons, labels, textAreas, and textBoxes
private int trans[];
private TextField txt_number;
private TextField txt_base;
private Button btn_Mod;
private Button btn_Clear;
private TextArea result;
// Fonts
private Font Arial;
private Font Norm;
public void init()
{
setLayout(null);
// set objects
txt_number = new TextField();
txt_base = new TextField();
btn_Mod = new Button("Convert");
btn_Clear = new Button("Clear");
result = new TextArea();
// position objects
txt_number.setBounds(10, 40, 120, 40);
txt_base.setBounds(140, 40, 50, 40);
btn_Mod.setBounds(10, 90, 120, 40);
btn_Clear.setBounds(140, 90, 120, 40);
result.setBounds(10, 140, 400, 60);
// add objects to the form
add(txt_number);
add(txt_base);
btn_Mod.addActionListener(this);
add(btn_Mod);
btn_Clear.addActionListener(this);
add(btn_Clear);
add(result);
// initialize fonts
Arial = new Font("Arial", Font.PLAIN, 28);
Norm = new Font("Arial", Font.BOLD, 18);
setFont(Arial);
}
public void actionPerformed(ActionEvent e)
{
Object source = e.getSource();
if(source == btn_Mod)
{
String input;
int base;
int num;
int size;
// clear the text area
result.setText("");
// get number to convert
input = txt_number.getText();
input = input.trim();
size = input.length();
num = Integer.parseInt(input);
if(num <= 0)
{
result.append("Invalid Number.");
}
else
{
// get base to convert to
input = txt_base.getText();
input = input.trim();
base = Integer.parseInt(input);
Mod_Convert(num, base, size);
}
}
else if(source == btn_Clear)
{
txt_number.setText("");
txt_base.setText("");
result.setText("");
}
}
public void Mod_Convert(int num, int base, int size)
{
int x = num;
int y = base;
int i = 0;
trans = new int[100];
do
{
trans = x % y;
x = x / y;
i++;
}while(x != 0);
// display
for(int k = i; k >= 0; k--)
{
if(trans[k] == 10)
{
result.append("A");
}
else if(trans[k] == 11)
{
result.append("B");
}
else if(trans[k] == 12)
{
result.append("C");
}
else if(trans[k] == 13)
{
result.append("D");
}
else if(trans[k] == 14)
{
result.append("E");
}
else if(trans[k] == 15)
{
result.append("F");
}
else if(trans[k] == 16)
{
result.append("G");
}
else if(trans[k] == 17)
{
result.append("H");
}
else if(trans[k] == 18)
{
result.append("I");
}
else if(trans[k] == 19)
{
result.append("J");
}
else if(trans[k] == 20)
{
result.append("K");
}
else if(trans[k] == 21)
{
result.append("L");
}
else if(trans[k] == 22)
{
result.append("M");
}
else if(trans[k] == 23)
{
result.append("N");
}
else if(trans[k] == 24)
{
result.append("O");
}
else if(trans[k] == 25)
{
result.append("P");
}
else if(trans[k] == 26)
{
result.append("Q");
}
else if(trans[k] == 27)
{
result.append("R");
}
else if(trans[k] == 28)
{
result.append("S");
}
else if(trans[k] == 29)
{
result.append("T");
}
else if(trans[k] == 30)
{
result.append("U");
}
else if(trans[k] == 31)
{
result.append("V");
}
else if(trans[k] == 32)
{
result.append("W");
}
else if(trans[k] == 33)
{
result.append("X");
}
else if(trans[k] == 34)
{
result.append("Y");
}
else if(trans[k] == 35)
{
result.append("Z");
}
else
{
result.append(String.valueOf(trans[k]));
}
}
}
public void paint(Graphics g)
{
setSize(430, 210);
setBackground(new Color(0, 100, 200));
g.setFont(Norm);
g.drawString("Number", 10, 30);
g.drawString("Base", 140, 30);
}
}