Errors- Runtime() in Swing Help

Question

Hi, Iam trying to use Runtime() in Swing..iam getting nonsense errors what have i missed?
import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class appSrunCommand extends JApplet implements Runnable,ActionListener{
     JLabel l1;
     JTextField tf;
     JButton run;
     JTextArea ta;
     JScrollPane jsp;
     String[] cmd = new String[4];
          public void init(){
               l1 = new JLabel("Enter the command");
               tf = new JTextField(10);
               run = new JButton("Run");
               ta = new JTextArea(20,20);
               //jsp = getConentPane();
               run.addActionListener(this);
                    Container con = getContentPane();
                    con.setLayout(new FlowLayout());
                    con.add(l1);con.add(tf);con.add(run);
                    con.add(ta);
                    public void actionPerformed(ActionEvent e){
                         String comm = tf.getText();
                         cmd[0]= "appSrunCommand";
                         cmd[1] = "cmd.exe";
                         cmd[2] = "/C";
                         cmd[3] = comm;
                         try{
                              Runtime rn = Runtime.getRuntime();
                              String temp = "";
                              ta.setText(String.valueOf("Executing "+ cmd[0]+" "+cmd[1]+" "+cmd[2]+" "+cmd[3]));
                              Process p = rn.exec(cmd);
                              int exitVal = rn.waitFor();
                              ta.setText(String.valueOf(exitVal));
                              // any error message?
            StreamGobbler errorGobbler = new
                StreamGobbler(rn.getErrorStream(), "ERROR");           
            // any output?
            StreamGobbler outputGobbler = new
                StreamGobbler(rn.getInputStream(), "OUTPUT");
            // kick them off
            errorGobbler.start();
            outputGobbler.start();
            // any error???
            //int exitVal = rn.waitFor();
                         catch(Throwable t){
                              ta.setText(String.valueOf(t));
class StreamGobbler extends Thread{
               InputStream is;
               String type;
          //     Thread t = new Thread(this);
          //     t.start();
                    StreamGobbler(InputStream is,String type){
                         this.is = is;
                         this.type = type;
                              public void run(){
                                   try{
                                        BufferedReader br = new BufferedReader( new InputStreamReader());
                                        String line = null;
                                        while((br.readLine())!= null)
                                        //ta.setText(String.valueOf(type+">"+ line));
                                        System.out.println(type+">"+line);
                                   catch(IOException ioe){}
                                   //     ta.setText(String.valueOf(ioe));
          Here are the errors..
--------------------Configuration: <Default>--------------------
C:\j2sdk\bin\appSrunCommand.java:11: appSrunCommand is not abstract and does not override abstract method run() in java.lang.Runnable
public class appSrunCommand extends JApplet implements Runnable,ActionListener{
       ^
C:\j2sdk\bin\appSrunCommand.java:45: cannot resolve symbol
symbol  : method waitFor ()
location: class java.lang.Runtime
                                                int exitVal = rn.waitFor();
                                                                ^
C:\j2sdk\bin\appSrunCommand.java:49: cannot resolve symbol
symbol  : method getErrorStream ()
location: class java.lang.Runtime
                StreamGobbler(rn.getErrorStream(), "ERROR");           
                                ^
C:\j2sdk\bin\appSrunCommand.java:53: cannot resolve symbol
symbol  : method getInputStream ()
location: class java.lang.Runtime
                StreamGobbler(rn.getInputStream(), "OUTPUT");
                                ^
C:\j2sdk\bin\appSrunCommand.java:80: cannot resolve symbol
symbol  : constructor InputStreamReader ()
location: class java.io.InputStreamReader
                                                                BufferedReader br = new BufferedReader( new InputStreamReader());
                                                                                                        ^
5 errors
Process completed.

Answer 1

appSrunCommand is not abstract and does not override abstract method run() in java.lang.RunnableThis error message doesn't only tell you what's wrong, it also gives you hints about how to fix it. Why don't you read the messages?