Tyler's Java Website

Array Dictionary

This application had several requirements:

• Understand arrays
• Understand where to use arrays
• Be able to create an array
• Allocate memory to an array
• Access array elements
• Understand length of an array
• Use for and enhanced for loops to manipulate arrays
• Learn about class Arrays from java.util package

The Code

The main thing that was standing in my way was understanding how to read the data from my arrays and to discern if there was a match or not. It was a real challenge. Try using some English and Spanish words:

• hello
• goodbye
• yes
• no
• toilet
• food
• water

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.MalformedURLException;
import java.net.URL;

import javax.swing.*;

/**
 * Class a translation app
 * 
 * @author Tyler Persohn 
 * @version 1.0
 */

public class ArrayDictionary extends JApplet implements ActionListener{

	private JLabel title, inputInstruction, imagePlaceholderLabel, instructionText, outputLabel, outputText;
	private JPanel inputPanel, outputPanel, imagePanel;
	private JTextField textField;
	private JButton translateWord;
	private String inputWord, outputWord;
	
	//declare and define english dictionary array
	String[] englishWords =
		{
			"HELLO",
			"GOODBYE",
			"YES",
			"NO",
			"PLEASE",
			"THANK YOU",
			"YOU'RE WELCOME",
			"TOILET",
			"WATER",
			"FOOD"	
		};
	//declare and define spanish dictionary array
	String[] spanishWords =
		{
			"HOLA",
			"ADIOS",
			"SI",
			"NO",
			"POR FAVOR",
			"GRACIAS",
			"DE NADA",
			"BAÑO",
			"AGUA",
			"COMIDA"	
		};
	
	Icon[] array; // declare image array

	

    public void init(){
        // This is a workaround for a security conflict with some browsers
        JRootPane rootPane = this.getRootPane();    
        rootPane.putClientProperty("defeatSystemEventQueueCheck", Boolean.TRUE);
		
        //Layout components -----------------------------------------------//
        Container contentPane = getContentPane(); 						  // Declare size of applet work space.
		contentPane.setBackground(Color.BLACK);  						 // Set Background color. 
		contentPane.setLayout(new BorderLayout()); 						// Set Layout style.
		contentPane.add(createTitlePanel(), BorderLayout.NORTH);       // Title placement.
		contentPane.add(createButtonPanel(), BorderLayout.SOUTH);     // Button placement.
		contentPane.add(createTextFieldPanel(), BorderLayout.CENTER);// TextField Placement.			
    }
    
    private Component createTitlePanel() {
		// Title Attributes------------------------------------------------------//
		JPanel titlePanel = new JPanel();										// Place a panel to put everything in
		titlePanel.setLayout(new FlowLayout());								   // Set Layout Style
		titlePanel.add(title = new JLabel("Array Dictionary", JLabel.CENTER));// Application title
		title.setForeground(Color.WHITE);									 // Text color
		titlePanel.setBackground(Color.BLACK);                              // Background Color
		return titlePanel;
	}
    
    private Component createTextFieldPanel(){
    	
    	//Main text Panel---------------------------//
    	JPanel textFieldPanel = new JPanel();      // A panel to put everything in
    	textFieldPanel.setBackground(Color.BLACK);// Background color
    	
    	//Input subpanel--------------------------------//          
    	textFieldPanel.add(inputPanel = new JPanel()); // A panel to put all the input stuff in
    	inputPanel.setBackground(Color.BLACK);        // Background color
    	
    	//input text field and instructions-----------------------------------------------------------//
    	inputPanel.add(inputInstruction = new JLabel("Enter English or Spanish text to translate:"));// Label for instructions
    	inputInstruction.setForeground(Color.WHITE);                                                // Text Color
    	inputPanel.add(textField = new JTextField());											   // Place the textfield for user input
    	textField.setColumns(10);																  // Size of field
    	
    	//Output subpanel-------------------------------//
    	textFieldPanel.add(outputPanel = new JPanel());// add the output panel to put everything in
    	outputPanel.setBackground(Color.BLACK);       // Background Color
    	
    	//label for output-------------------------------------------//
    	outputPanel.add(outputLabel = new JLabel("Translation: ")); // label for output
    	outputLabel.setForeground(Color.WHITE);                    // text color
    	
    	//translation output------------------------------------------//
    	outputPanel.add(outputText = new JLabel("Translated Text")); // translated text
    	outputText.setForeground(Color.WHITE);                      // text color
    	
    	//Images go here----------------------------------------------------------//
    	outputPanel.add(imagePanel = new JPanel());							     // add the panel to put images in
    	imagePanel.add(imagePlaceholderLabel = new JLabel(" "));				// this is where images will go
    	imagePanel.setBackground(Color.BLACK);								   // background color
    	imagePlaceholderLabel.setForeground(Color.WHITE);					  // text color
    	return textFieldPanel;												  
    }

    private Component createButtonPanel() {
		// Button Controls-----------------------------------------//
		JPanel controls = new JPanel();                           // add the panel to put buttons in
		controls.setLayout(new FlowLayout());                    // Layout style
		controls.add(translateWord = new JButton("Translate")); // Button title
		translateWord.addActionListener(this);                 // listener
		return controls;
	}
    
	private int findMatchingIndex(String[] words, String input){
		//function for grabbing the array index--------//
    	for (int i=0; i<words.length; i++){ 		  // loop through the array
    		if(words[i].equalsIgnoreCase(input)){    // compare input to our array
    		return i; 					            // return the index 
    		}									   //
    	} 										  //
		return -1;					             // if no match
    	
    }
    
    
	@Override
	public void actionPerformed(ActionEvent event) {
		//Get variables-----------------------------------------------------//
		inputWord = textField.getText();							       // User input
		int englishIndex = findMatchingIndex(englishWords, inputWord);    // pass variables to findMatchingIndex function
		int spanishIndex = findMatchingIndex(spanishWords, inputWord);   // pass variables to findMatchingIndex function
	
		int eImageIndex = findMatchingIndex(englishWords, inputWord);   //
		int sImageIndex = findMatchingIndex(spanishWords, inputWord);  //
		
		int index = Math.max(englishIndex, spanishIndex);			 // return largest number from arrays
		
		// create image array
		array = new ImageIcon[10];
		try {
		array[0] = new ImageIcon(new URL("http://i.imgur.com/KkdKxMy.jpg"));
		array[1] = new ImageIcon(new URL("http://i.imgur.com/8FQbxhH.jpg"));
		array[2] = new ImageIcon(new URL("http://i.imgur.com/cQQecrl.jpg"));
		array[3] = new ImageIcon(new URL("http://i.imgur.com/Rs4iJhQ.jpg"));
		array[4] = new ImageIcon(new URL("http://i.imgur.com/x3aujlN.jpg"));
		array[5] = new ImageIcon(new URL("http://i.imgur.com/83snYJQ.jpg"));
		array[6] = new ImageIcon(new URL("http://i.imgur.com/83snYJQ.jpg"));
		array[7] = new ImageIcon(new URL("http://i.imgur.com/QFfGgHc.jpg"));
		array[8] = new ImageIcon(new URL("http://i.imgur.com/D7KjrY6.jpg"));
		array[9] = new ImageIcon(new URL("http://i.imgur.com/BdUSJQV.jpg"));
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		if (index == -1) {
			   outputText.setText("Word was not found.");
			  } 
		else {
			   if (index == englishIndex) {
			    outputText.setText(spanishWords[index]); 
			    imagePlaceholderLabel.setIcon(array[index]);
			   } 
			   else {
			    outputText.setText(englishWords[index]);
			    imagePlaceholderLabel.setIcon(array[index]);
			   }
			  }			
	
	}

	private ImageIcon Image(URL codeBase, String string) {
		return null;
	}
}

Array Dictionary Applet