Java101: Catching and Handling Exceptions question

Question

Dear all,
I am learning java from http://java.sun.com/docs/books/tutorial/essential/exceptions/putItTogether.html
However, I think the code in ListOfNumbers may have some problem, I put void in front of the function, but still have error. Could you please tell me any problem in the program?
thanks
import java.util.Vector;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.*;
public class Main {
    private Vector vector;
    private int SIZE = 10;
    public static void main(String[] args) throws IOException {
    public ListOfNumbers () {
        vector = new Vector(SIZE);
        for (int i = 0; i < SIZE; i++) {
            vector.addElement(new Integer(i));
    public void writeList() {
        PrintWriter out = new PrintWriter(
                            new FileWriter("OutFile.txt"));
        for (int i = 0; i < SIZE; i++) {
            out.println("Value at: " + i + " = " +
                         vector.elementAt(i));
        out.close();
        FileInputStream in = null;
        FileOutputStream out = null;
            in = new FileInputStream("xanadu.txt");
            out = new FileOutputStream("outagain.txt");
            int c;
            while ((c = in.read()) != -1) {
                out.write(c);
    public void writeList() {
    PrintWriter out = null;
    try {
        System.out.println("Entering try statement");
        out = new PrintWriter(
                       new FileWriter("OutFile.txt"));
            for (int i = 0; i < 5; i++)
                out.println("Value at: " + i + " = "
                             + vector.elementAt(i));
    } catch (ArrayIndexOutOfBoundsException e) {
         System.err.println("Caught "
                     + "ArrayIndexOutOfBoundsException: "
                     +   e.getMessage());
    } catch (IOException e) {
         System.err.println("Caught IOException: "
                             +  e.getMessage());
    } finally {
         if (out != null) {
             System.out.println("Closing PrintWriter");
             out.close();
         else {
             System.out.println("PrintWriter not open");
}

Answer 1

I have also post the error message here, I change the name of the file and the class name. I think I can not handle the error message #1 and #2. Please help me! Thanks
* Main.java
* Created on June 19, 2007, 10:54 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package bytestreams01;
* @author Marco
import java.util.Vector;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.*;
public class Main {
    private Vector vector;
    private int SIZE = 10;
    public static void ListOfNumbers(String[] args) throws IOException {
    public ListOfNumbers () {
        vector = new Vector(SIZE);
        for (int i = 0; i < SIZE; i++) {
            vector.addElement(new Integer(i));
        FileInputStream in = null;
        FileOutputStream out = null;
            in = new FileInputStream("xanadu.txt");
            out = new FileOutputStream("outagain.txt");
            int c;
            while ((c = in.read()) != -1) {
                out.write(c);
    public void writeList() {
    PrintWriter out = null;
    try {
        System.out.println("Entering try statement");
        out = new PrintWriter(
                       new FileWriter("OutFile.txt"));
            for (int i = 0; i < 5; i++)
                out.println("Value at: " + i + " = "
                             + vector.elementAt(i));
    } catch (ArrayIndexOutOfBoundsException e) {
         System.err.println("Caught "
                     + "ArrayIndexOutOfBoundsException: "
                     +   e.getMessage());
    } catch (IOException e) {
         System.err.println("Caught IOException: "
                             +  e.getMessage());
    } finally {
         if (out != null) {
             System.out.println("Closing PrintWriter");
             out.close();
         else {
             System.out.println("PrintWriter not open");
}error message
init:
deps-jar:
Compiling 1 source file to C:\Users\Marco\bytestreams01\build\classes
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:29: illegal start of expression
public ListOfNumbers () {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:29: invalid method declaration; return type required
public ListOfNumbers () {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:41: <identifier> expected
in = new FileInputStream("xanadu.txt");
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:42: <identifier> expected
out = new FileOutputStream("outagain.txt");
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:45: illegal start of type
while ((c = in.read()) != -1) {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:45: <identifier> expected
while ((c = in.read()) != -1) {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:45: ';' expected
while ((c = in.read()) != -1) {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:50: class, interface, or enum expected
public void writeList() {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:53: class, interface, or enum expected
try {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:55: class, interface, or enum expected
out = new PrintWriter(
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:57: class, interface, or enum expected
for (int i = 0; i < 5; i++)
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:57: class, interface, or enum expected
for (int i = 0; i < 5; i++)
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:57: class, interface, or enum expected
for (int i = 0; i < 5; i++)
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:61: class, interface, or enum expected
} catch (ArrayIndexOutOfBoundsException e) {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:66: class, interface, or enum expected
} catch (IOException e) {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:70: class, interface, or enum expected
} finally {
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:73: class, interface, or enum expected
out.close();
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:75: class, interface, or enum expected
C:\Users\Marco\bytestreams01\src\bytestreams01\ListOfNumbers.java:78: class, interface, or enum expected
19 errors
BUILD FAILED (total time: 0 seconds)