Release three tiny programs I made

Scott@JAVA — Sat, 03 Dec 2005 19:33:00 GMT

JAlarm -- Set your own alarm on PC with the sound you like
Develop under: WinXP + Eclipse 3.1 + SWT 3.1 + JDK 5.0

Download: http://www.cc.puv.fi/~e0300481/download/JAlarm_beta-win32_x86_no_jre.zip

WeatherNow - weather display program (Vaasa, Finland only)
Develop under: WinXP + Eclipse 3.1 + SWT 3.1 + JDK 5.0

Download: http://www.cc.puv.fi/~e0300481/download/WeatherNow_beta-win32_x86_no_jre.zip

JNotepad - Java Win Notepad
Develop under: WinXP + Eclipse 3.1 + SWT 3.1 + JDK 5.0

Download: http://www.cc.puv.fi/~e0300481/download/JNotepad_beta-win32_x86_no_jre.zip

Please check the "ReadMe.txt" file for more details, after you unpack the zip file.
Source codes are included together with the application programs, do not hesitate to criticise on my codes, your recommand will make a difference.
Thanks :)

Scott@JAVA 2005-12-04 03:33 发表评论

GOOGLE挑战赛练习题1

Scott@JAVA — Thu, 01 Dec 2005 09:49:00 GMT

Problem Statement

A simple line drawing program uses a blank 20 x 20 pixel canvas and a directional cursor that starts at the upper left corner pointing straight down. The upper left corner of the canvas is at (0, 0) and the lower right corner is at (19, 19). You are given a string[], commands, each element of which contains one of two possible commands. A command of the form "FORWARD x" means that the cursor should move forward by x pixels. Each pixel on its path, including the start and end points, is painted black. The only other command is "LEFT", which means that the cursor should change its direction by 90 degrees counterclockwise. So, if the cursor is initially pointing straight down and it receives a single "LEFT" command, it will end up pointing straight to the right. Execute all the commands in order and return the resulting 20 x 20 pixel canvas as a string[] where character j of element i represents the pixel at (i, j). Black pixels should be represented as uppercase 'X' characters and blank pixels should be represented as '.' characters.

Definition

Class: DrawLines
Method: execute
Parameters: string[]
Returns: string[]
Method signature: string[] execute(string[] commands)

(be sure your method is public)

我的程序：

public class DrawLines {
    // current cursor position
    private int xPos, yPos;

    private int direction;

    private char[][] canvas;

    public DrawLines() {
        xPos = 0;
        yPos = 0;
        // initial drawing direction downwards
        direction = 270;
        canvas = new char[20][20];
    }

    private void initCanvas() {
        for (int i = 0; i < 20; i++)
            for (int j = 0; j < 20; j++)
                canvas[i][j] = '.';
    }

    public String[] excute(String[] commands) {
        initCanvas();
        for (int i = 0; i < commands.length; i++) {
            if (commands[i].equals("LEFT")) {
                // when come cross "LEFT", turn 90 degrees couter-clockwise
                direction += 90;
                if (direction == 360)
                    direction = 0;
            } else {
                int len = Integer.parseInt(commands[i].split(" ")[1]);
                switch (direction) {
                case 0:
                    // draw from left to right
                    for (int j = 0; j <= len; j++)
                        canvas[xPos][yPos++] = 'X';
                    yPos--;
                    break;
                case 90:
                    // draw from down to up
                    for (int j = 0; j <= len; j++)
                        canvas[xPos--][yPos] = 'X';
                    xPos++;
                    break;
                case 180:
                    // draw from right to left
                    for (int j = 0; j <= len; j++)
                        canvas[xPos][yPos--] = 'X';
                    yPos++;
                    break;
                case 270:
                    // draw from up to down
                    for (int j = 0; j <= len; j++)
                        canvas[xPos++][yPos] = 'X';
                    xPos--;
                    break;
                }
            }
        }
        String[] s = new String[20];
        for (int i = 0; i < 20; i++)
            s[i] = new String(canvas[i]);
        return s;
    }

    public static void main(String[] args) {
        String[] cmds = { "LEFT", "FORWARD 19", "LEFT", "LEFT", "LEFT",
                "FORWARD 18", "LEFT", "LEFT", "LEFT", "FORWARD 17", "LEFT",
                "LEFT", "LEFT", "FORWARD 16", "LEFT", "LEFT", "LEFT",
                "FORWARD 15", "LEFT", "LEFT", "LEFT", "FORWARD 14", "LEFT",
                "LEFT", "LEFT", "FORWARD 13", "LEFT", "LEFT", "LEFT",
                "FORWARD 12", "LEFT", "LEFT", "LEFT", "FORWARD 11", "LEFT",
                "LEFT", "LEFT", "FORWARD 10", "LEFT", "LEFT", "LEFT",
                "FORWARD 9", "LEFT", "LEFT", "LEFT", "FORWARD 8", "LEFT",
                "LEFT", "LEFT", "FORWARD 7" };
        DrawLines drawLines = new DrawLines();
        String[] s = drawLines.excute(cmds);
        for (int i = 0; i < 20; i++)
            System.out.println(s[i]);
    }
}

Scott@JAVA 2005-12-01 17:49 发表评论

BlogJava-Scott@JAVA-随笔分类-My Java App

Release three tiny programs I made

GOOGLE挑战赛练习题1