I have a few compile errors. Can someone give me direction?

Question

I have some compile areas in the following code and I am not really sure how to correct.
Can someone give guidance? Thanks
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.Window.*;
import java.awt.event.*;
import javax.swing.*;
import java.applet.*;
import java.net.*;
public class FrontEnd_2 extends Applet{
     private static int appType = 0;
     private Frame FrontEnd_2 = null;
     private Choice nameList = new Choice();
     private Label PipeID = new Label("");
     private TextField pipelineName = new TextField();
     private TextField problem = new TextField();
     private TextField location = new TextField();
     private TextField repairCost = new TextField();
     private Button update = new Button("Update");
     private Button clear = new Button("Clear");
     private Button delete = new Button("Delete");
     private Button exit = new Button("Exit");
     private long idList[] = null;
     public static void main(String args[]){
     appType = 1;
     new FrontEnd_2();
     public FrontEnd_2(){
     Panel p = new Panel(new GridLayout(6,3));
     p.add(new Label());
     p.add(nameList);
     p.add(new Label());
     p.add(new Label("PipeId"));
     p.add(new Label());
     p.add(new Label());
     p.add(new Label("Pipeline Name"));
     p.add(pipelineName);
     p.add(update);
     p.add(new Label("Problem"));
     p.add(problem);
     p.add(clear);
     p.add(new Label("Location"));
     p.add(location);
     p.add(delete);
     p.add(new Label("Repair Cost"));
     p.add(repairCost);
     p.add(exit);
     String data = getData("L0");
          StringTokenizer st = new StringTokenizer(stRetVal, ",");
          nameList.add("[select a name]");
          int size = st.countTokens() / 2;
          idList = new long[size+1];
               for ( int i=1; i<=size; i++ ) {
                    idList[i] = Long.parseLong(st.nextToken());
                    nameList.add(st.nextToken());
     private String getData(String cmd)
     Socket s = null;
     BufferedReader reader = null;
     BufferedWriter writer = null;
     String sRetVal = " ";
     try{
     s = new Socket("66.24.174.32",1234);
     reader = new BufferedReader(new InputStreamReader(s.getInputStream()));
     writer = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
     writer.write(cmd);
     writer.newLine();
     writer.flush();
     writer.close();
     sRetVal = reader.readLine();
     catch(UnknownHostException ue){
     catch(IOException ioe){
finally
     writer = null;
     reader = null;
     return sRetVal;
     switch(appType){
     case 0:                                                                           // Applet extends panel
     FrontEnd.add(p);
     break;
     case 1:                                                                           // Application
     FrontEnd_2 = new Frame("Pipeline Inputs");
     FrontEnd_2.addWindowListener(this);
     nameList.addItemListener(this);
     exit.addActionListener(this);
     p.add(exit);
     FrontEnd.add(p);
     FrontEnd.setSize(30,60);
     FrontEnd.setVisible(true);
     break;
     public void actionPerformed(ActionEvent ae){
          if(ae.getSource() == exit){
          fileExit();
          else if (ae.getSource() == clear){
          fileClear();
     public void itemStateChanged(ItemEvent e) {
          int index = nameList.getSelectedIndexOf();
          long id = idList[index];
          String data = getData("R" + id);
          StringTokenizer st = StringTokenizer(data, ",");
          PipeID.setText(st.nextToken());
          problem.setText(st.nextToken());
          location.setText(st.nextToken());
          repairCost.setText(st.nextToken()):
     public void windowActivated(WindowEvent we){     }
     public void windowClosed(WindowEvent we){     }
     public void windowClosing(WindowEvent we){ fileExit();}
     public void windowDeactivated(WindowEvent we){     }
     public void windowDeiconified(WindowEvent we){     }
     public void windowIconified(WindowEvent we){     }
     public void windowOpened(WindowEvent we){     }
     private void fileExit(){
     FrontEnd_2.dispose();
     System.exit(0);

Answer 1

Some of the errors that I got while compiling your program were the following:
1) You need to declare your methods outside of your constructor
2) You are declaring sretval in a private method getData and passing it on to StringTokenizer. You should declare it as an instance variable cuz local variables won't go any farther than the method in which they were declared.
3) You did not implement WindowListener, ActionListener, ItemListener.
Some tips: Try to use adapters in an anonymous inner class to implement listeners such as WindowAdapter.
Use some white space between your code. It makes it a heck of a lot easier to read. Use indentation to show nested statements :)
Here is the fixed code.
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.Window.*;
import java.awt.event.*;
import javax.swing.*;
import java.applet.*;
import java.net.*;
public class FrontEnd_2 extends Applet implements WindowListener, ActionListener, ItemListener{
private static int appType = 0;
private String sRetVal = " ";
private Frame FrontEnd_2 = null;
private Choice nameList = new Choice();
private Label PipeID = new Label("");
private TextField pipelineName = new TextField();
private TextField problem = new TextField();
private TextField location = new TextField();
private TextField repairCost = new TextField();
private Button update = new Button("Update");
private Button clear = new Button("Clear");
private Button delete = new Button("Delete");
private Button exit = new Button("Exit");
private long idList[] = null;
* mainline
public static void main(String args[]){
appType = 1;
new FrontEnd_2();
public FrontEnd_2(){
Panel p = new Panel(new GridLayout(6,3));
p.add(new Label());
p.add(nameList);
p.add(new Label());
p.add(new Label("PipeId"));
p.add(new Label());
p.add(new Label());
p.add(new Label("Pipeline Name"));
p.add(pipelineName);
p.add(update);
p.add(new Label("Problem"));
p.add(problem);
p.add(clear);
p.add(new Label("Location"));
p.add(location);
p.add(delete);
p.add(new Label("Repair Cost"));
p.add(repairCost);
p.add(exit);
String data = getData("L0");
StringTokenizer st = new StringTokenizer(sRetVal, ",");
nameList.add("[select a name]");
int size = st.countTokens() / 2;
long idList = size+1;
for ( int i=1; i<=size; i++ ) {
idList = Long.parseLong(st.nextToken());
nameList.add(st.nextToken());
switch(appType){
case 0: // Applet extends panel
FrontEnd_2.add(p);
break;
case 1: // Application
FrontEnd_2 = new Frame("Pipeline Inputs");
FrontEnd_2.addWindowListener(this);
nameList.addItemListener(this);
exit.addActionListener(this);
p.add(exit);
FrontEnd_2.add(p);
FrontEnd_2.setSize(300,300);
FrontEnd_2.setVisible(true);
break;
}//end constructor
public void actionPerformed(ActionEvent ae){
if(ae.getSource() == exit){
fileExit();
else if (ae.getSource() == clear){
fileClear();
public void itemStateChanged(ItemEvent e) {
int index = nameList.getSelectedIndex();
long id = idList[index];
String data = getData("R" + id);
StringTokenizer st = new StringTokenizer(data, ",");
PipeID.setText(st.nextToken());
problem.setText(st.nextToken());
location.setText(st.nextToken());
repairCost.setText(st.nextToken());
public void windowActivated(WindowEvent we){ }
public void windowClosed(WindowEvent we){ }
public void windowClosing(WindowEvent we){ fileExit();}
public void windowDeactivated(WindowEvent we){ }
public void windowDeiconified(WindowEvent we){ }
public void windowIconified(WindowEvent we){ }
public void windowOpened(WindowEvent we){ }
private void fileExit(){
FrontEnd_2.dispose();
System.exit(0);
private void fileClear(){
//do something here
//start of getData
private String getData(String cmd){
Socket s = null;
BufferedReader reader = null;
BufferedWriter writer = null;
try{
s = new Socket("66.24.174.32",1234);
reader = new BufferedReader(new InputStreamReader(s.getInputStream()));
writer = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
writer.write(cmd);
writer.newLine();
writer.flush();
writer.close();
sRetVal = reader.readLine();
}//end try
catch(UnknownHostException ue){
catch(IOException ioe){
finally{
writer = null;
reader = null;
return sRetVal;
}//end getData