Tuesday, April 27, 2010

Java Code: URL Shortener

Wrote this code some time back for a programming interview, sharing it for everyone's use.
Its a 64 character encoded URL shortener code written in java. The code does not use any database backend but can be easily modified to support that.

Update: replacing the code text with Github Gist for better formatting support



9 comments:

  1. Thanks for sharing the code.. Will try with storing the urls in database. Hopefully should work.

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  2. Thansk for your help and very greatful to getting this good solution...

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  3. Hi,

    Solution looks good,but the shorten url does not redirects to the long one.Is that something i am missing.

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  4. The loop at the end seems to be incomplete...could you please complete that

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  5. A url ending with a slash is not the same as a url without. Often it is, but it depends on the server. Just like the server decides if the path is case-sensitive or not (linux/windows). Whereas the host name isn't, and the protocol neither (equalsIgnoreCase("http://")).

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  6. Thansk for your help and very greatful

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  7. package com.firstgame;

    import java.awt.Color;
    import java.awt.Graphics;= 5;
    public int movementResetSpeed = 1;
    public int movementSpeed = 1;
    public int movementFrame = 1;
    public int noseHeight = 10;
    public int noseWidth = 10;

    public boolean objectDefine = false;
    public boolean falling = false;
    public boolean running = true;
    public boolean left = false;
    public boolean right = false;
    public boolean leftNose = true;
    public boolean rightNose = true;


    public Thread game;
    public Ac (Ad f) {
    setBackground(Color.blue);

    defineObjects();

    game = new Thread(this);
    game.start();

    f.addKeyListener(new KeyAdapter() {
    public void keyPressed(KeyEvent e) {
    if(e.getKeyCode() == keyLeft) {
    left = true;
    rightNose = false;
    leftNose = true;
    }
    if(e.getKeyCode() == keyRight) {
    right = true;
    leftNose = false;
    rightNose = true;
    }
    }
    public void keyReleased(KeyEvent e) {
    if(e.getKeyCode() == keyLeft) {
    left = false;
    }
    if(e.getKeyCode() == keyRight) {
    right = false;
    }
    }
    });
    }

    void defineObjects() {
    character = new Rectangle ((Am.width/2) - (characterwidth/2), (Am.height/2) - (characterheight/2), characterwidth, characterheight);
    floor = new Rectangle(0, 300, 600, 100);

    objectDefine = true;

    System.out.println("Shapes DefineObjects is running");

    repaint();
    }

    public void paint(Graphics g) {
    super.paint(g);

    if (objectDefine) {
    System.out.println("Graphics is running");
    g.setColor(Color.CYAN);
    g.fillRect(character.x, character.y, character.width, character.height);
    g.setColor(Color.green);
    g.fillRect(floor.x, floor.y, floor.width, floor.height);

    if(leftNose) {
    g.setColor(Color.yellow);
    g.fillRect(character.x - noseWidth, character.y + (character.height/4), noseWidth, noseHeight);
    } else if(rightNose) {
    g.setColor(Color.yellow);
    g.fillRect(character.x + character.width, character.y + (character.height/4), noseWidth, noseHeight);
    }
    }
    }

    public void run() {
    while (running) {

    //character feet
    Point pt1 = new Point(character.x, character.y + character.height);
    Point pt2 = new Point(character.x +character.width, character.y +character.height);


    //Falling
    if(fallingFrame >= fallingSpeed) {
    if (floor.contains(pt1) || floor.contains(pt2)) {
    falling = false;
    } else {
    character.y += 1;
    falling = true;
    }

    if (falling) {
    character.y += 1;
    }

    fallingFrame = 0;
    }else {
    fallingFrame += 1;
    }
    //movement speed check
    if(falling) {
    movementSpeed = movementFallingSpeed;
    } else {
    movementSpeed = movementResetSpeed;
    }

    //Movement
    if(movementFrame >= movementSpeed) {
    if(right) {
    character.x += 1;
    }

    if(left) {
    character.x -= 1;
    }

    movementFrame = -1;
    } else {
    movementFrame += 1;
    }

    fpsSetter();

    repaint();

    System.out.println("Run Method is running");
    }
    }
    public void fpsSetter() {
    try{
    game.sleep(fps/1000);
    }
    catch(Exception e) {
    e.printStackTrace();
    System.out.println("fpsSetter is running");

    }
    }
    }

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