main.java

Implement the following integer methods: a) Method celsius returns the Celsius equivalent of a Fahr

/*
 * Main.java
 *
 * Created on 2007年8月10日, 下午12:54
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package javaapplication6;
import javax.swing.JOptionPane;
/**
 *
 * @author xue hao
 */
public class Main {
    
    /** Creates a new instance of Main */
    public Main() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
    
            // Prompt the user to enter the size of the side of a square
        String input = JOptionPane.showInputDialog("Enter length of side: ");
        
        
         // Convert string to int value
        int length = Integer.parseInt(input);
        if (length > 20)
        {
            JOptionPane.showMessageDialog(null, "The length must between 1 and 20!");
            System.exit(0);
        }
        
        // Display heading
        String output = "Enter length of side : " + length + "\n";
        
        // Display the first line
        for (int line = 1; line <= length; line++)
        {
            output += "* ";
        }
        
        // Display the row
        output += "\n";
        for (int row = 1; row <= (length - 2); row++)
        {
            output += "*";
            
            for (int line = 1; line <= (length - 2); line++)
            {
                output += "   ";
            }
            
            output += "*" + "\n";
        }
        
        // Display the last line
        for (int line = 1; line <= length; line++)
        {
            output += "* ";
        }
        
         // Display the output
        JOptionPane.showMessageDialog(null, output);
    }
    
}