Thread: Drawing Image in Java

Hello, I add a second button to paint a second image on the screen, however when i select the second radio button it is overriding the first image which was previously drawn. How can i solve this? I want to draw both images.Here is my code

// class1
 
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
 
 
 
import java.awt.Dimension;
 
 
 
 
/**
 *
 * @author User
 */
public class Buildings {
    private Image img,img2;
    private String s;
    private int b_index;
    private BufferedImage image, offScreenImage;
    private int width,height;
 
 
    private String s_shopping="School";
    private String building="Building";
 
 
 
 
    public Buildings(){
 
        try{
 
            img= ImageIO.read(new File("building.jpg"));
            img2=ImageIO.read(new File("s1.jpg"));
 
        }
        catch(IOException e){
        System.out.println("Image not found");
    }
 
 
    }
 
 
 
 
 
    public void PaintBuilding(Graphics2D  offScreenG2D, int x, int y){
 
        offScreenG2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
 
        offScreenG2D.drawImage(img, x,y,null);
        offScreenG2D.drawString(building, x+1, y+1);
 
    }
 
public void PaintSchool(Graphics2D g2d, int x, int y){
 
	g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
 
	g2d.drawImage(img2, x,y,null);
        g2d.drawString(s_shopping, x+1, y+1);
 
    }
 
 
    public String getString(){
        return s;
    }
 
    public void setString(String s){
        this.s=s;
    }
 
    public void setBIndex(int index){
        this.b_index=index;
    }
 
    public int getBIndex(){
        return b_index;
    }
 
 
}
 
//class2
 
import javax.swing.*;
import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
 
class BuildingOptions extends JFrame{
	JRadioButton rb1;
	JRadioButton rb2;
	ButtonGroup bgroup;
	private int build_index;
	JPanel panelRbutton;
	// modify the line below to the second line
	// Buildings build= new Buildings();
	static Buildings build;
 
	// modify the constructor as shown
	public BuildingOptions( Buildings build ){
		super("Choose a building");
 
		// add this line:
		this.build = build;
 
		build.setBIndex(build_index);
		rb1= new JRadioButton("Add a School");
		rb2=new JRadioButton("Add a Shopping Mall");
		//rb3=new JRadioButton()
		bgroup= new ButtonGroup();
		bgroup.add(rb1);
		bgroup.add(rb2);
		rb1.addItemListener(new ButtonListener());
		rb2.addItemListener(new ButtonListener());
		panelRbutton= new JPanel();
		panelRbutton.add(rb1);
		panelRbutton.add(rb2);
		this.add(panelRbutton);
		this.setSize(250, 300);
		this.setBackground(Color.LIGHT_GRAY);
		this.setVisible(true);
		repaint();
	}
	public class ButtonListener implements ItemListener{
		public void itemStateChanged(ItemEvent e){
			if(e.getSource()==rb1){
				System.out.println("School");
				build_index=1;
				build.setBIndex(build_index);
				repaint();
				System.out.println("Index here is:"+build.getBIndex());
 
 
 
			}
			if(e.getSource()==rb2){
				System.out.println("Building");
				build_index=2;
				build.setBIndex(build_index);
				repaint();
				System.out.println("Index here is:"+build.getBIndex());
 
 
 
		}
	}
	// commented out main() method to avoid confusion:
	/*
	public static void Main(String [] args){
		BuildingOptions frame1= new BuildingOptions(build);
		frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame1.setVisible(true);
	}*/ 
 
	}
}
 
 
//class3
 
import javax.swing.*;
 
//import Buildings.MouseDrag;
 
 
 
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
 
 
 
public class MainDrawing extends JPanel
{
	int id=2;
	int index;
	int height, width, x,y;
	// this creates Object1-A, 'b'
	Buildings b= new Buildings();
	boolean buildingS=false;
	JButton b1;
	BuildingOptions bOpt;
	MouseDrag mouseDrag;
	public MainDrawing()
	{
		index=index;
		this.setBackground(Color.white);
		this.setSize(300,150);
		//mouseDrag = new MouseDrag();
       // addMouseListener(mouseDrag);
        //addMouseMotionListener(mouseDrag);
		// b.setBIndex(index);
		b1=new JButton("Add Buildings");
		b1.setSize(25, 50);
		b1.addActionListener(new ButtonListener());
		add(b1);
		  mouseDrag = new MouseDrag();
	      addMouseListener(mouseDrag);
	      addMouseMotionListener(mouseDrag);    
 
	    }
 
 
	    private final class MouseDrag extends MouseAdapter {
	        private boolean dragging = false;
	        private Point last;
 
	        @Override
	        public void mousePressed(MouseEvent m) {
	            last = m.getPoint();
	           // dragging = isInsideEllipse(last);
	            if (!dragging) {
	                x = last.x;
	                y = last.y;
	                width = 0;
	                height = 0;
	            }
	         //   repaint();
	        }
 
	        @Override
	        public void mouseReleased(MouseEvent m) {
	            //last = null;
	            dragging = true;
	           repaint();
	        }
 
	        @Override
	        public void mouseDragged(MouseEvent m) {
	            int dx = m.getX() - last.x;
	            int dy = m.getY() - last.y;
	            if (dragging) {
	                x += dx;
	                y += dy;
	            } else {
	                width += dx;
	                height += dy;
	            }
	            last = m.getPoint();
	            repaint();
	        }
	    }
 
 
	public void paint(Graphics g){
		super.paint(g);
		Graphics2D g2d=(Graphics2D)g;
		System.out.println("Index is:"+b.getBIndex());
		if(b.getBIndex()==1)
 
			b.PaintSchool(g2d, x, y);
		if(b.getBIndex()==2)
 
			b.PaintBuilding(g2d, x, y);
	}
 
	public class ButtonListener implements ActionListener{
		public void actionPerformed(ActionEvent e) {
			if(e.getSource()==b1)
				// this creates Object2, passing a reference to Object1-A
				bOpt= new BuildingOptions( b );
			bOpt.setVisible(true);
			bOpt.setSize(250, 250);
			System.out.println("Index in button listener in class buttonListener:"+b.getBIndex());
			repaint();
			/*index=1;
// buildingS=true;
b.setBIndex(index);
repaint();
System.out.println("Index:"+b.getBIndex());*/
		}
	}
 
 
	public static void main(String args[]){
		MainDrawing md= new MainDrawing();
		JFrame f=new JFrame();
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		//f.setBackground(Color.yellow);
		f.setContentPane(md);
		f.setVisible(true);
		f.setSize(350,350);
		f.setVisible(true);
	}
}