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String Comparison

1 reply on 1 page. Most recent reply: Mar 21, 2003 3:41 PM by Rich Burgis

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Craig

Posts: 4
Nickname: craig7200
Registered: Jan, 2003

String Comparison

Posted: Mar 21, 2003 12:52 PM

Im stumped on this .. im trying to state whether the first string is less than, equal to or greater than the second while ignoring the case using regionMatches. The program creates a GUI in which a "compare it" button is clicked for results. Just looking for some assistance or suggestions on the comparison part.

Here is what I have so far:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class StringCompare extends JFrame {
private JLabel prompt1, prompt2, prompt3, prompt4;
private JButton toCompare;
private JTextField input;

//constructor builds GUI

public StringCompare()
{
super( "String Comparison" );

Container container = getContentPane();
container.setLayout( new FlowLayout());

prompt1 = new JLabel( " Enter the first string ");
input = new JTextField( 15 );
container.add( prompt1 );
container.add( input );

prompt2 = new JLabel( " Enter the second string ");
input = new JTextField( 15 );
container.add( prompt2 );
container.add( input );

prompt3 = new JLabel( " Enter the number of characters ");
input = new JTextField( 10 );
container.add( prompt3 );
container.add( input );

prompt4 = new JLabel( " Enter starting index ");
input = new JTextField( 10 );
container.add( prompt4 );
container.add( input );

toCompare = new JButton("Compare it");
toCompare.addActionListener(

new ActionListener(){

public void actionPerformed( ActionEvent actionEvent )
{
// test regionMatches (ignore case) STUMPED ON THIS PART

if (prompt1.regionMatches(true,

}
}
);
container.add ( toCompare );
setSize( 200, 285 );
setVisible ( true );
}

public static void main( String args[] )
{
StringCompare application = new StringCompare();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}
}

Rich Burgis

Posts: 17
Nickname: songbird
Registered: Mar, 2003

Re: String Comparison

Posted: Mar 21, 2003 3:41 PM

Try (from the api javadoc)

compareToIgnoreCase

public int compareToIgnoreCase(String?str)

Compares two strings lexicographically, ignoring case considerations. This method returns an integer whose sign is that of this.toUpperCase().toLowerCase().compareTo( str.toUpperCase().toLowerCase()).

Parameters:
str - the String to be compared.
Returns:
a negative integer, zero, or a positive integer as the the specified String is greater than, equal to, or less than this String, ignoring case considerations.
Since:
1.2

It sounds like what you were looking for

Good luck
Rich

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