-Xlint???

When compiling my project i get this kind of message:
"Note: rtype\Craft.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details."

code is :

Code:

---

package rtype;

import java.awt.Image;
import java.awt.event.KeyEvent;

import java.util.ArrayList;

import javax.swing.ImageIcon;

public class Craft {

    private String craft = "craft.png";

    private int dx;
    private int dy;
    private int x;
    private int y;
    private Image image;

    private ArrayList missiles;

    private final int CRAFT_SIZE = 20;

    public Craft() {
        ImageIcon ii = new ImageIcon(this.getClass().getResource(craft));
        image = ii.getImage();
        missiles = new ArrayList();
        x = 40;
        y = 60;
    }


    public void move() {
        x += dx;
        y += dy;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public Image getImage() {
        return image;
    }

    public ArrayList getMissiles() {
        return missiles;
    }

    public void keyPressed(KeyEvent e) {

        int key = e.getKeyCode();

        if (key == KeyEvent.VK_SPACE) {
            fire();
        }

        if (key == KeyEvent.VK_LEFT) {
            dx = -1;
        }

        if (key == KeyEvent.VK_RIGHT) {
            dx = 1;
        }

        if (key == KeyEvent.VK_UP) {
            dy = -1;
        }

        if (key == KeyEvent.VK_DOWN) {
            dy = 1;
        }
    }

    public void fire() {
        missiles.add(new Missile(x + CRAFT_SIZE, y + CRAFT_SIZE/2));
    }

    public void keyReleased(KeyEvent e) {
        int key = e.getKeyCode();

        if (key == KeyEvent.VK_LEFT) {
            dx = 0;
        }

        if (key == KeyEvent.VK_RIGHT) {
            dx = 0;
        }

        if (key == KeyEvent.VK_UP) {
            dy = 0;
        }

        if (key == KeyEvent.VK_DOWN) {
            dy = 0;
        }
    }
}

---

Could someone tell me whatswrogn here?

You're using a 'raw' type ArrayList and the compiler warns against it.

kind regards,

Jos

im following zetcode tutorial and there it says do it this way. What would be yor suggestion to fix it?

Quote:

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Originally Posted by vastrolorde

im following zetcode tutorial and there it says do it this way. What would be yor suggestion to fix it?

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Try another tutorial and in the mean time use a parameterized ArrayList<Missile> so your compiler knows about it.

kind regards,

Jos

From looking at your code, it should be

Code:

---

  private ArrayList<Missile> missiles;  // since Java 1.5
    private final int CRAFT_SIZE = 20;
    public Craft() {
        ImageIcon ii = new ImageIcon(this.getClass().getResource(craft));
        image = ii.getImage();
        missiles = new ArrayList<Missile>();
        x = 40;
        y = 60;
    }
  ...
 
  public ArrayList<Missile> getMissiles() {
      return missiles;
  }

---

Regards,
Jim

Quote:

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Originally Posted by jim829

Last edited by jim829; Today at 07:49 PM. Reason: too late again!!

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Hah! Finally! Victory is mine! Someone is even slower than I am! I'm going to be famous and filthy stinking rich! And ample supplies of scantily clad women! and ... and ... sorry, 't won't happen again.

kindest regards,

Jos ;-)

ty for help. problem is solved now :P