The second part of the exercise requires the first code to convert to a txt file instead of a dat file. Then I want the second program to be able to read it and display

// Create poll results and output them to a file. import javax.swing.*; import java.io.*;

public class CreateResults {

private static int getValue() { // prompt the user for input String input = JOptionPane.showInputDialog( "Enter integer result (1 - 10), -1 to quit:" );

try { return Integer.parseInt( input ); // try to get an integer }

// if its not an integer catch( NumberFormatException format ) { return 11; // return an invalid value } }

public static void main( String args[] ) { try { // create the output stream DataOutputStream pollNumbers = new DataOutputStream( new FileOutputStream( "numbers.dat" ) );

int pollValue = getValue(); // get a number from the user

// test for the sentinel value while( pollValue != -1 ) {

// if the number is valid if ( pollValue > 0 && pollValue < 11 ) pollNumbers.writeInt( pollValue ); // write the value

pollValue = getValue(); // get another value }

pollNumbers.close(); // close the file }

catch( IOException ioException ) { JOptionPane.showMessageDialog( null, "Error with the file", "IOError", JOptionPane.ERROR_MESSAGE ); }

System.exit( 0 );

} // end main

} // end class CreateResults

Second code

// Read poll results from a file and output ratings. import javax.swing.*; import java.io.*;

public class StudentPoll {

public static void main( String args[] ) { int frequency[] = new int[ 11 ];

try { DataInputStream pollNumbers = new DataInputStream( new FileInputStream( "numbers.dat" ) );

try { // for each answer, use that value as subscript to // determine element to increment while( true ) ++frequency[ pollNumbers.readInt() ]; }

catch( EOFException eof ) { }

String output = "Rating\tFrequency ";

// append frequencies to String output for ( int rating = 1; rating < frequency.length; rating++ ) output += rating + "\t" + frequency[ rating ] + " ";

JTextArea outputArea = new JTextArea(); outputArea.setText( output );

PrintWriter writer = new PrintWriter( new FileWriter( "output.txt" ) ); writer.print( output ); writer.close();

JOptionPane.showMessageDialog( null, outputArea, "Student Poll Program", JOptionPane.INFORMATION_MESSAGE );

pollNumbers.close();

System.exit( 0 );

}

catch( IOException io ) { JOptionPane.showMessageDialog( null, "File Error", "IO Error", JOptionPane.ERROR_MESSAGE ); System.exit( 1 ); }

} // end main

} // end class StudentPoll