permaculture playing cards*
The moose likes Applets and the fly likes Help Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Murach's Java Servlets and JSP this week in the Servlets forum!
JavaRanch » Java Forums » Java » Applets
Bookmark "Help" Watch "Help" New topic
Author

Help

arun iyer
Greenhorn

Joined: Nov 29, 2000
Posts: 28
hi,
i wrote the following applet. When i click on enter button, all the components are removed but the new textfields and buttons are not added. i would like to know how to remove the components and add new ones.
----------------
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.applet.*;
public class admin extends Applet implements ActionListener
{
Font theFont = new Font("TimesRoman",Font.BOLD,14);
Label l0,l1,l2,l3,l5,l6,l7;
TextField t0,t1,t2,t3,t5,t6,t7;
String s0,s1,s2,s3,s5;
static String s6,s7;
Button b1,b2;
int i=0;
public void entry (){
System.out.println("Inside Entry");
setLayout(new GridLayout (11,2));
add(l0);
add(t0);
add(l1);
add(t1);
add(l2);
add(t2);
add(l3);
add(t3);
add(l5);
add(t5);
add(b1);
b1.addActionListener(this);
repaint();
}
public void init()
{
setBackground(Color.white);
l0 = new Label("Number of Rounds (1-10) :");
l1 = new Label("Questions per Round (1-36) :");
l2 = new Label("Time (In Minutes) :");
l3 = new Label("Review Allowed (True/False):");
l5 = new Label("Minimum Score required :");
l6 = new Label("Login");
l7 = new Label("Password");
t0 = new TextField(10);
t1 = new TextField(10);
t2 = new TextField(10);
t3 = new TextField("True",10);
t5 = new TextField(10);
t6 = new TextField(10);
t7 = new TextField(10);
b1 = new Button("Save");
b2 = new Button("Enter");

//setLayout(new GridLayout (3,2));
add(l6);
add(t6);
add(l7);
add(t7);
t7.setEchoChar('*');
add(b2);
b2.addActionListener(this);
}

public void actionPerformed(ActionEvent e) {
if (e.getSource() ==b2)
{
s6 = t6.getText();
s7 = t7.getText();
System.out.println("Hello");
if (s6.equals("admin") && s7.equals("webaccess"))
{
remove(l6);
remove(t6);
remove(l7);
remove(t7);
remove(b2);
entry();
}
}

if (e.getSource() ==b1)
{
s1 =t1.getText();
s2 =t2.getText();
s3 =t3.getText();
s5 =t5.getText();
s0 =t0.getText();
try{


FileWriter f0 = new FileWriter("c:\\jr\\numofround.txt", false);

f0.write(s0);
f0.close();
FileWriter f1 = new FileWriter("c:\\jr\\questround.txt", false);

f1.write(s1);
f1.close();

FileWriter f2 = new FileWriter("c:\\jr\\time.txt", false);

int num = Integer.parseInt(s2);
num=num-1;
f2.write(String.valueOf(num));
f2.close();

FileWriter f3 = new FileWriter("c:\\jr\\review.txt", false);
if (s3=="true" | | s3=="True")
{
f3.write("1");
f3.close();
}
else {
f3.write("2");
f3.close();
}

FileWriter f5 = new FileWriter("c:\\jr\\tscore.txt", false);

f5.write(s5);
f5.close();

remove(l0);
remove(t0);
remove(l1);
remove(t1);
remove(l2);
remove(t2);
remove(l3);
remove(t3);
remove(l5);
remove(t5);
remove(b1);
i=1;
repaint();
} catch (Exception e1) {}
}
}

public void paint(Graphics g) {
if (i==1)
{
g.setColor(Color.blue);
g.setFont(theFont);
g.drawString("Results Saved",20,20);
}

}
}
Cindy Glass
"The Hood"
Sheriff

Joined: Sep 29, 2000
Posts: 8521
After init you never added any components. In you actionPerformed method after you do all those removes, you have to declare and add the new stuff.


"JavaRanch, where the deer and the Certified play" - David O'Meara
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Help
 
Similar Threads
applet problem
Can't Update Record ?
Code!
Can't Update Record ?
The INSERT INTO statement contains the following unknown field name: 'OPANo'.