Question on Graphics/JFrame/KeyEvents

**loopsnhoops** · 02-10-2011, 08:49 PM

I want the user to be able to control the oval on the screen with the arrow keys. Here is my code.

//main

Java Code:

package Game;

public class main {

public static void main(String[] args){

new Starter();

}

}
//initiator

Java Code:

package Game;

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class Starter extends JFrame implements ActionListener {

Starter(){

super("Game Selector");
JButton Close = new JButton("Close");
JButton maze = new JButton("Maze");
JButton idk = new JButton("idk");
JLabel tell = new JLabel(" Please Select A Game");
GridLayout Lay = new GridLayout(4,2);
setLayout(Lay);
add(tell);
add(maze);
add(idk);
add(Close);
this.setSize(400, 400); 
setVisible(true);


Close.setActionCommand("Close");
Close.addActionListener(this);
maze.setActionCommand("Maze");
maze.addActionListener(this);
idk.setActionCommand("idk");
idk.addActionListener(this);

}

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

if("Close".equals(e.getActionCommand())){

System.exit(0);
setVisible(false);

}

if("Maze".equals(e.getActionCommand())){

new Maze();
setVisible(false); 

}

if("idk".equals(e.getActionCommand())){

//new idk();

}

}

Java Code:

}
//JFrame / graphics 1
Code:
package Game;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.util.Scanner;
import java.awt.image.*;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Maze extends JFrame {

BufferedImage img;
Oval oval = new Oval();
JFrame frame; 
int x = 0;
int y = 0;
//Graphics g;
JPanel panel = new JPanel();
JComponent comp;


Maze(){

frame = new JFrame();
frame.setTitle("Maze");
frame.getContentPane();
frame.setSize(800,800);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E);
frame.setBackground(Color.yellow);
//setPreferredSize(new Dimension(800,800));
setBackground(Color.black);
frame.setVisible(true);


}


public void paintComponent(Graphics2D g) {

super.paintComponents(g);

Graphics2D g2 = (Graphics2D)g;
//img = (BufferedImage)(this.createImage(getWidth(),getHei ght()));
Graphics2D gc = img.createGraphics();
gc.setColor(Color.RED); 
oval.drawOval(gc); 


}









//public void keyPressed(KeyEvent e) {
//	if(e.getKeyCode()==KeyEvent.VK_DOWN){
//	System.out.println("key down was pressed");
//	g.drawRect(x, y-1, 10, 10);
//	g.fillRect(x, y-1, 10, 10);
//	g.setColor(Color.black);
//	}
//	if(e.getKeyCode()==KeyEvent.VK_UP){
//	System.out.println(".");
//	g.drawRect(x, y+1, 10, 10);
//	g.fillRect(x, y+1, 10, 10);
//	g.setColor(Color.black);
//	}
//	if(e.getKeyCode()==KeyEvent.VK_LEFT){
//	System.out.println("k");
//	g.drawRect(x+1, y, 10, 10);
//	}
//	if(e.getKeyCode()==KeyEvent.VK_RIGHT){
//	 System.out.println("lol");
//	 g.drawRect(x-1, y, 10, 10);
//	}

//}
{

}
}

//oval creation / graphics2

Java Code:

package Game;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.*;

public class Oval {
BufferedImage img;

public Oval() {
img = new BufferedImage(800, 800, BufferedImage.OPAQUE);
}

public void drawOval(Graphics a){
Graphics g = img.getGraphics();
int x = 0;
int y = 0;
g.setColor(Color.black);
g.drawOval(x, y, 10, 10);

}

public BufferedImage getOval() {
return img;
}

public void paint(Graphics g) {
g.drawImage(img, 0, 0, null);
}	
}

Thanks, and I know it might be too long for a forum but the tutorials really haven't helped my understanding of Graphics.