java - collision detection not working? -


im quite new java. trying make can control ball arrow keys , if collide ball, print line in console saying "you lost" or somthing.

i have done moving, struggling bit how can 2 balls collide. far have tried (i think put rectangle around ball, don't know really!):

public void collision() {     rectangle rectp = new rectangle(player.x, player.y, player.width, player.height);            rectangle recte = new rectangle(enemy.ex, enemy.ey, enemy.width, enemy.height);      if(rectp.intersects(recte))     {      system.out.println("game over");     } }

could me out , explain have done wrong.

ps. please don't give me code, want try , learn!!!.

thanks.

public void actionperformed(actionevent e) {     repaint();     x += velx;     y += vely; }  public void up() {     vely = -1.5;     velx = 0; }  public void down() {     vely = 1.5;     velx = 0; }  public void left() {     vely = 0;     velx = -1.5; }  public void right() {     vely = 0;     velx = 1.5; }  public void keypressed(keyevent e) {     int code = e.getkeycode();     if (code == keyevent.vk_up) {         up();     }     if (code == keyevent.vk_down) {         down();     }     if (code == keyevent.vk_left) {         left();     }     if (code == keyevent.vk_right) {         right();     } }

if have coords x , y of 2 ball centers , know balls radiuses - should simple task.

just calculate distance between centers of balls , compare sum of balls radiuses.

you asked skip formulas that's :)

ps looks strange in code player lowercased enemy capitalized.. class or object?


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