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

public class AnagramGUI extends JFrame {

    JTextArea textArea;
    JTextField stringField;
    JScrollPane scrollPane;

    public AnagramGUI ()
    {
        // Set some parameters of the frame (window) that's brought up.
        this.setSize (600, 600);
        this.setTitle ("Anagram Tester");
        this.setResizable (true);

        // This is how stuff is put into a frame.
	Container cPane = this.getContentPane();
        textArea = new JTextArea ();
	scrollPane = new JScrollPane (textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        cPane.add (scrollPane, BorderLayout.CENTER);
        
        // Make the controls.
        JPanel panel = new JPanel ();
        JLabel label = new JLabel ("Enter two strings: ");
        panel.add (label);
        stringField = new JTextField (30);
        panel.add (stringField);
        JButton button = new JButton ("Go");
	button.addActionListener (
	  new ActionListener () {
	      public void actionPerformed (ActionEvent a)
	      {
		  handleButtonClick();
	      }
	  }
        );
        panel.add (button);
        cPane.add (panel, BorderLayout.SOUTH);
        
        this.setVisible (true);
    }
    

    String inputStr;


    // When the user clicks the button, this method gets called.
    // It's where we need to respond.

    void handleButtonClick ()
    {
        // Extract the string from the textfield where the user typed the strings.
        inputStr = stringField.getText ();

        // Break into two strings, separating by space.
	String[] strings = inputStr.split (" ");

        // Check if anagrams.
	boolean yes = areAnagrams (strings[0].toCharArray(), strings[1].toCharArray());

        // Prepare output.
	String outputStr = strings[0] + " and " + strings[1] + " are not anagrams";
	if (yes) {
	    outputStr = strings[0] + " and " + strings[1] + " are anagrams";
	}

        // Put the output string in the text box.
	String text = textArea.getText ();
	text += outputStr + "\n";
	textArea.setText (text);
    }


    static boolean areAnagrams (char[] A, char[] B)
    {
	if (A.length != B.length) {
	    return false;
	}

        // Make a copy.
	char[] C = new char [B.length];
	for (int i=0; i<B.length; i++) {
	    C[i] = B[i];

	}

	for (int i=0; i<A.length; i++) {

	    // Search for A[i] in C.
	    boolean found = false;
	    for (int j=0; j<C.length; j++) {
		if (A[i] == C[j]) {
		    found = true;
		    C[j] = '#';   
		    break;
		}
	    }

	    if (! found) {
		return false;
	    }

	} //end-for

	return true;
    }



    public static void main (String[] argv)
    {
	AnagramGUI a = new AnagramGUI ();
    }

}