JAVA 타자연습 프로그램

package com.tansanc.tistory;

import java.awt.BorderLayout;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

class MyFrame extends JFrame implements KeyListener
{
	JLabel staticText;
	JTextField inputText;
	JLabel resultText;
	long start;
	long end;
	String problemArray[] =
	{ "JAVA", "안녕하세요" };
	ArrayList problemList = new ArrayList();

	public MyFrame()
	{
		problemList.add("JAVA");
		problemList.add("안녕하세요");
		this.setSize(300, 200);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setTitle("이벤트 예제");
		staticText = new JLabel("Hello World");
		add(staticText, BorderLayout.NORTH);
		inputText = new JTextField("");
		add(inputText, BorderLayout.CENTER);
		resultText = new JLabel("Hello World");
		add(resultText, BorderLayout.SOUTH);

		inputText.addKeyListener(this);

		setVisible(true);
		start = System.currentTimeMillis();
	}

	@Override
	public void keyPressed(KeyEvent e)
	{
	}

	@Override
	public void keyReleased(KeyEvent e)
	{

	}

	@Override
	public void keyTyped(KeyEvent e)
	{
		if (staticText.getText().equals(inputText.getText()))
		{
			Random r = new Random();
			end = System.currentTimeMillis();
			resultText.setText("정답입니다. " + inputText.getText().length()
					/ ((end - start) / 1000.0 / 60.0));
			staticText.setText(problemList.get(r.nextInt(2)));
			inputText.setText("");
		}
	}
}

public class Test
{
	public static void main(String[] args)
	{
		MyFrame t = new MyFrame();
	}
}