HI,need help continuing this code, im stuck and i want to make it work
Thanx
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
public class WinListBs extends Frame {
Button btnExec, btnExit ;
Label lblNum ;
TextField fldNum ;
List lstVals1, lstVals2, lstCommands;
Node head = null;
Node last = null;
WinListBs () {
super ("List Boxes Handling");
// define Components
lstVals1 = new List(20,false);
lstVals2 = new List(20,false);
lstCommands = new List(20,false);
btnExit = new Button("Exit");
lblNum = new Label("îñôø");
fldNum = new TextField("7");
// nice Components
Font f1 = new Font("David", Font.BOLD, 20);
Font f2 = new Font("COURIER", Font.ITALIC, 20);
Font f3 = new Font("DAVID", Font.BOLD, 16);
Font f4 = new Font("COURIER", Font.BOLD, 16);
lblNum.setBackground( Color.YELLOW );
lblNum.setFont( f2 );
fldNum.setBackground( Color.CYAN );
fldNum.setFont( f1 );
btnExit.setFont( f4 );
btnExit.setForeground( Color.MAGENTA );
lstVals1.setFont(f4);
lstVals2.setFont(f3);
lstCommands.setFont(f4);
lstCommands.setBackground(Color.GRAY);
// listeners
CActListener myHandler = new CActListener();
btnExit.addActionListener( myHandler );
lstCommands.addItemListener(new ClstBoxListener());
// build main window (a panel)
setLayout(new GridLayout(1,4));
Panel pControls = new Panel ();
pControls.setLayout(new GridLayout(7,1));
pControls.add( lblNum );
pControls.add( fldNum );
pControls.add( btnExit );
add( pControls );
add( lstCommands );
add( lstVals1 );
add( lstVals2 );
lstVals1.add("<empty>");
lstVals2.add("<empty>");
setupCmds();
// pack and show
pack();
setLocation(400,100);
setSize(500,400);
setVisible(true); // show
} // CTOR
private void setupCmds () {
lstCommands.add("Random"); // generate 5 random numbers
lstCommands.add("Reset"); // list => empty
lstCommands.add("Push as First");
lstCommands.add("Push as Last");
lstCommands.add("Get First");
lstCommands.add("Get Last");
lstCommands.add("Del First");
lstCommands.add("Del Last");
lstCommands.add("Add sort"); // add fldNum in the right (sorted) place
lstCommands.add("Del num"); // delete (from list) the fldNum (all occurances)
lstCommands.add("Del bigger"); // delete bigger than fldNum
lstCommands.add("List2 even"); // show even numbers in lstVals2
lstCommands.add("List2 bigger"); // show even numbers in lstVals2
} // setupCmds
private void showVals1 (){
lstVals1.removeAll();
Node p = head ;
int k = 0;
while (p != null){
lstVals1.add(k + " => " + p.x);
k++;
p = p.next;
} // while
} // ShowVals1
private void doRandom (int n) {
for (int k = 0 ; k < n ; k++){
int z = (int)(Math.random()*100);
pushNum(z);
} // for
} // doRandom
private class ClstBoxListener implements ItemListener {
public void itemStateChanged(ItemEvent e){
List lsm = (List)e.getSource();
String s = lsm.getSelectedItem();
if (s.equals("Random")) {
doRandom(5);
showVals1();
return;
} // Random
if (s.equals("Push as First")) {
String sf = fldNum.getText();
int z = Integer.parseInt(sf);
pushNum(z);
showVals1();
return ;
} // Push as First
} //itemStateChanged
} // ClstBoxListener
private void pushNum (int z) {
Node tmp = new Node(z,head);
head = tmp;
if (last == null) last = tmp;
} // pushNum
private class CActListener implements ActionListener {
public void actionPerformed (ActionEvent evt) {
if (evt.getSource()== btnExit) System.exit(0);
} // actionPerformed
} //CActListener
private class Node {
private int x ;
private Node next;
Node (int dx){
x= dx ; next = null;
}
Node (int dx , Node dNext){
x= dx ; next = dNext;
}
void setNext (Node dNext){
next= dNext;
}
Node getNext () {
return next;
}
} // private class LinkNum
public static void main(String[] args) {
WinListBs mainWin = new WinListBs();
} // main
} // class