removing image background color using java?

[sudde gameeef]

i have a sprite sheet(image) and i want to draw on screen.


image = sprite sheet image
x = player x postion
y = player y postion
width = player width
height = player heigh

public class main extends japplet
{
 ...
 
 
 public void paint(Graphics g)
  {
      g.drawImage(image, x, y, x+width, y+height, 
	               0, 0, 40, 40 ,sprite_sheet.m1);
  }
}

so on spreet sheet i have a image of player, and its background color is blue. when i drawImage it create image background blue. now i cloud remove the color by using photoshop but i really dont want to do this. bc it will remove part of my player.

is there way to del the background color using java code?? may be there is a funtion

[Rob Camick]

I don't know how to remove the color from the image.

However, you should NOT be overriding the paint() method of your JApplet. Custom painting should be done by overriding the paintComponent() method of a JPanel. Then you add the panel to the applet.

[sudde gameeef]

i c. this seem to be working now but if i paint in different class than it doesnt work. for ex. below player_class paint doesnt work. any idea?

error on: player_class.paintComponent(g);

public class mainextends JApplet
{	
	Timer timer;
	Display display_class;
	Player player_class;
	

	/*** init method ***/
	public void init()
	{
		setSize(800, 400);
		display_class = new Display(); 
		setContentPane(display_class);  
	}/*** end of init method ***/
	
	
	
	/*** stat method ***/
	public void start()
	{	
		timer = new Timer(30, this);  
		timer.start();               
	}/*** end of start method ***/
	
	

	/*** game loop ***/
	public void actionPerformed(ActionEvent e)
	{	
		repaint();
	}/*** end of run method ***/



	/*** paint method ***/ 
	public class Display extends JPanel
	{
		public void paintComponent(Graphics g)
		{	
			super.paintComponent(g);     
			
			player_class.paint(g);    //draw from different class
		}/** end of paint component method ***/
	 }/*** end of display class ***/
}/*** end of main class ***/

player.java

public class player
{
	/*** PLAYER VARIABLES ***/
	private int x = 10;
	private int y = 200;
	private int width = 15;
	private int height = 100;

	
	/*** CONSTRUCTOR METHOD ***/
	public player1()
	{
		
	}
	

	public void paint(Graphics g)
	{
		g.setColor(Color.red);
		g.fillRect(x, y, width, height); 
	}	
}

error:
The method paint(Graphics, main) in the type main_menu is not applicable for the arguments (Graphics, main.Display)

[m Korbel]

crossposted

[Rob Camick]

Name your classes correctly. Class names start with an upper case character. "player" should be "Player". Your contructor for the Player is wrong, you have "player1". Also you should be creating the Player object in the Display class not the applet class. The applet is just a shell for the panel you add to the content pane.

[sudde gameeef]

also in main i have Player p lower case.
and two line were

player_class.paint(g, this);
and

public void paint(Graphics g, main m)

[sudde gameeef]

sudde gameeef wrote:i remove the 1 also in main i have Player p lower case.
and two line were

player_class.paint(g, this);
and

public void paint(Graphics g, main m)

[Maneesh Godbole]

m Korbel wrote:crossposted

Thanks m Korbel.

sudde gameeef
Please read https://coderanch.com/how-to/java/BeForthrightWhenCrossPostingToOtherSites