BattleFieldTemplate_MoveRandomMethod.java

/*
 * Copyright (c) 2014 kademika.com
 */
package Lesson2.KeyPoint4;

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

public class BattleFieldTemplate_MoveRandomMethod extends JPanel {

	boolean COLORDED_MODE = true;

	int tankX = 0;
	int tankY = 0;

	long speed = 225;

	/**
	 * Write your code here.
	 */
	void runTheGame() throws Exception {
        while (true) {
        moveRandom();
        Thread.sleep(speed);
        }
    }

	void move(int direction){

        if (direction >= 1 && direction <= 4) {
            if (direction == 1 && tankY != 0) {
                tankY -= 64;
                System.out.println("Move TANK by one step to the UP");
                repaint();
            } else if (direction == 2 && tankY <= 448) {
                tankY += 64;
                System.out.println("Move TANK by one step to the DOWN");
                repaint();
            } else if (direction == 3 && tankX != 0) {
                tankX -= 64;
                System.out.println("Move TANK by one step to the LEFT");
                repaint();
            } else if (direction == 4 && tankX <= 448) {
                tankX += 64;
                System.out.println("Move TANK by one step to the RIGHT");
                repaint();
            }
        } else {
            System.out.println("Correct data please input!!!");
        }

	}

    void start(int number) {

        if (number > 0) {
            while (number > 0) {
                System.out.println(number--);
                if (number == 0) {
                    System.out.println(number);
                    System.out.println("Go!");
                }
            }
        } else if (number == 0) {
            System.out.println("Go!");
        } else {
            System.out.println("Start failed");
        }
    }

    void moveRandom() {
        long a = System.currentTimeMillis();
        String s = String.valueOf(a);
        String lastChar = s.substring(s.length() - 2, s.length() - 1);
        int lastDigit = Integer.parseInt(lastChar);
        if (lastDigit > 0 && lastDigit < 5) {
            move(lastDigit);
        }
    }


	// Magic bellow. Do not worry about this now, you will understand everything in this course.
	// Please concentrate on your tasks only.

	final int BF_WIDTH = 576;
	final int BF_HEIGHT = 576;

	public static void main(String[] args) throws Exception {
		BattleFieldTemplate_MoveRandomMethod bf = new BattleFieldTemplate_MoveRandomMethod();
        bf.runTheGame();

    }

	public BattleFieldTemplate_MoveRandomMethod() throws Exception {
		JFrame frame = new JFrame("BATTLE FIELD, DAY 2");
		frame.setLocation(500, 150);
		frame.setMinimumSize(new Dimension(BF_WIDTH, BF_HEIGHT + 22));
		frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		frame.getContentPane().add(this);
		frame.pack();
		frame.setVisible(true);
    }


	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		
		int i = 0;
		Color cc;
		for (int v = 0; v < 9; v++) {
			for (int h = 0; h < 9; h++) {
				if (COLORDED_MODE) {
					if (i % 2 == 0) {
						cc = new Color(252, 241, 177);
					} else {
						cc = new Color(233, 243, 255);
					}
				} else {
					cc = new Color(180, 180, 180);
				}
				i++;
				g.setColor(cc);
				g.fillRect(h * 64, v * 64, 64, 64);
			}
		}
		
		g.setColor(new Color(255, 0, 0));
		g.fillRect(tankX, tankY, 64, 64);
	}

}

При запуске программы метод случайного движения работает очень плохо.