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I am doing a game in java, but I didnt put image, I already tried to put it by "drawimage", but it is not working right = (
I do not know where would be the best place to save the image and how would be the best method to call the image.`

 public void paint(Graphics2D g2)
 g2.setColor(getRandomColor());
 g2.fillOval((int)x, (int)y, (int)diametro, (int)diametro);



`

This code is from my class asteroides they are a circle (because I'm going to test the collision with circles).
Thanks

I'm pretty sure you mean you want do draw an image on the Panel. First of all, I'd recommend you create a resources folder inside the projects src folder, and add all images there. Once you're done, you have to load the image with imageIO and draw it with drawImage. Here's a short example:

package asteroid;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;

public class Nave 

 BufferedImage iconeNave;

 public Nave( ... ) 
 try
 iconeNave = ImageIO.read(getClass().getResource("/resources/nave.png"));
 catch(IOException e)e.printStackTrace();
 catch(Exception e)e.printStackTrace();
 

 @Override
 public void paint(Graphics2D g2)
 AffineTransform at = new AffineTransform();
 at.translate((int)x + radius/2.5,(int)y + radius/2.5);
 at.rotate(Math.PI/2 + angle);
 at.translate(-iconeNave.getWidth()/2, -iconeNave.getHeight()/2);
 g2.drawImage(iconeNave, at, null);
 

In order to create an image in Java, you will first need to create a JPanel (essentially a window on your screen). It will look something like this (taken from javacodex.com):

import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.swing.*;
import javax.imageio.ImageIO;

public class JPanelExample 

 public static void main(String arguments) throws IOException 

 JPanel panel = new JPanel();

 BufferedImage image = ImageIO.read(new File("./java.jpg"));
 JLabel label = new JLabel(new ImageIcon(image));
 panel.add(label);

 // main window
 JFrame.setDefaultLookAndFeelDecorated(true);
 JFrame frame = new JFrame("JPanel Example");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 // add the Jpanel to the main window
 frame.add(panel); 

 frame.pack();
 frame.setVisible(true);

 

However, I am assuming that by "image," you mean a shape drawn out onto the screen instead (since you are using a paint method that draws a circle in your example). Then, you have your code in the correct method but need to implement a JPanel (since without a JPanel or JFrame you can't really display anything onto the screen graphics-wise).

Here is an example taken from Board.java of my Atari Breakout mini-game:

public class Board extends JPanel implements KeyListener {

 // Other Game Code

 public void paint(Graphics g) 
 super.paint(g);
 Graphics2D g2 = (Graphics2D) g;
 g2.setColor(Color.BLACK);

 // Shows lives left and score on screen
 g2.drawString("Lives left: " + lives, 400, 600);
 g2.drawString("Score: " + score, 400, 500);

 // Paints Walls (separate paint method created in wall class)
 topWall.paint(g2);
 bottomWall.paint(g2);
 leftWall.paint(g2);
 rightWall.paint(g2);

 // Paints 2 Balls (separate paint method created in ball class)
 b.paint(g2);
 b2.paint(g2);

 // Paints Paddle (separate paint method created in paddle class)
 paddle.paint(g2);

 // Paints Bricks based on current level (separate paint method created in brick class)
 // Bricks were created/stored in 2D Array, so drawn on screen through 2D Array as well. 
 if (level == 1) 
 for (int x = 0; x < bricks.length; x++) 
 for (int i = 0; i < bricks[0].length; i++) 
 bricks[x][i].paint(g2);
 
 
 
 if (level == 2) 
 for (int x = 0; x < bricks.length; x++) 
 for (int i = 0; i < bricks[0].length; i++) 
 bricks[x][i].paint(g2);
 
 
 


 

Here is an example of a Paint Method in the Paddle Class:

// Constructor
 public Paddle(int x, int y, int w, int h)

 xpos = x;
 ypos = y;
 width = w;
 height = h;

 r = new Rectangle(xpos, ypos, width, height);
 

public void paint(Graphics2D g2)

 g2.fill(r);
 

Output (What is shown on Screen):

Hope this helps you in drawing your circle!