# program for factorial

how to set size of buttons on frame November 15, 2010 at 1:14 PM

Hi Friend,

Using the setPreferredSize(new Dimension(40,15)); method, you can set the button size in awt in java.

```import java.awt.*;
import java.awt.event.*;
import java.util.regex.*;
class ButtonSize extends Frame{
Label l;
ButtonSize(){
Label lab=new Label("Enter number to find its factorial: ");
final TextField text=new TextField(20);
Button b=new Button("Find");
Panel p=new Panel();
l=new Label();
Panel pan=new Panel();
public void actionPerformed(ActionEvent e){
String input=text.getText();
Pattern p = Pattern.compile("[A-Z,a-z,&%\$#@!()*^]");
Matcher m = p.matcher(input);
if(m.find()){
l.setText("*Enter only numeric value!");
l.setSize(250,20);
l.setForeground(Color.RED);
ltext.setText("");
}
else if(input.equals("")){
l.setText("*Enter value!");
l.setSize(250,20);
l.setForeground(Color.RED);
}
else{

int num=Integer.parseInt(input);
long fac=num;
for(int i=num;i>1;i--){
fac=fac*(i-1);
}
System.out.println(fac);
l.setText("Factorial Of Number "+input+" is: "+Long.toString(fac));
l.setSize(250,20);
l.setForeground(Color.BLUE);
}
}
});
b.setPreferredSize(new Dimension(40,15));
pack();
setVisible(true);
}
public static void main(String[] args){
new ButtonSize();
}
}
```

Thanks

program for factorial
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program on factorial of a given number in java
program on factorial of a given number in java  please tell me, how to write program on factorial of a given number in java
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