Drawing help!!!

Question

Hi everyone,
I just needed help with my java drawing program. I have to create a program that will allow user input to choose the demo they want. For example, demo1 will be "draw lines", demo 2 will be "draw oval" and so on.. However, my main problem is, how will i draw 10 lines?? would i use a loop? This is what i have so far and it's been driving me nuts because it only draws one line... i'd like it to offset by 1... but it doesn't seem possible no matter what i do. Also there's a circledemo in there where it requires me to use drawOval to draw the circles and have them in a pattern... the third demo wants me to color them. and the last demo which is a rectangle demo wants me to place any rectangle randomly on the applet... This is what i have so far.
import javax.swing.JOptionPane;
import java.awt.*;
import javax.swing.*;
import java.applet.*;
* @author
* @version
public class Shapes2 extends JApplet
String input;
int choice;
int lines=10;
public void init()
do
input = JOptionPane.showInputDialog("Enter 1 to draw lines\n" + "Enter 2 to draw rectangles\n" +
"Enter 3 to draw ovals\n" + "Enter 4 to draw polygons");
choice = Integer.parseInt(input);
//paint(Graphics g);
repaint();
}while (choice > 4);
public void paint(Graphics g)
switch (choice)
case 1:
if (choice == 1)
{lineDemo(g);
break;}
case 2:
if (choice == 2)
{circleDemo(g);
break;}
case 3:
if (choice == 3)
{circleDemo2(g);
break;}
case 4:
if (choice == 4)
{rectDemo(g);
break;}
default: break;
} g.drawString("Please enter 1, 2, 3 or 4", 20, 20);
private void lineDemo(Graphics g)
g.drawLine(20,20,280,280); // how do i draw 10 lines here???
private void circleDemo(Graphics g) // draw circles all over the screen ...using nested for loops
private void circleDemo2(Graphics g) //color the drawn circles from above
private void rectDemo(Graphics g) // draw any graphical item on the screen randomly
Edited by: blackcoda786 on May 23, 2009 9:41 PM
Edited by: blackcoda786 on May 23, 2009 9:43 PM

Answer 1

import javax.swing.JOptionPane;
import java.awt.*;
import javax.swing.*;
import java.applet.*;
* create a shape then have it repeat 100x.
* @author
* @version
public class Shapes2 extends JApplet
    String input;
    int choice;
    int lines=10;
    public void init()
        do
            input = JOptionPane.showInputDialog("Enter 1 to draw lines\n" + "Enter 2 to draw rectangles\n" +
                                  "Enter 3 to draw ovals\n" + "Enter 4 to draw polygons"); 
            choice = Integer.parseInt(input);
            //paint(Graphics g);
            repaint();
        }while (choice > 4); 
public void paint(Graphics g)
                switch (choice)
                    case 1:
                        if (choice == 1)
                                {lineDemo(g);
                                break;}
                    case 2:
                        if (choice == 2)
                                {circleDemo(g);
                                break;}
                    case 3:   
                        if (choice == 3)
                                {circleDemo2(g);
                                break;}
                    case 4:
                        if (choice == 4)
                                {rectDemo(g);
                                break;}
                        default: break;
                }       g.drawString("Please enter 1, 2, 3 or 4", 20, 20);
           private void lineDemo(Graphics g)
               // how do i draw 10 lines here???
                for(int i=0; i<10; i++)
                 g.drawLine(20,20,280,280)
            private void circleDemo(Graphics g) // draw circles all over the screen ...using nested for loops
            private void circleDemo2(Graphics g) //color the drawn circles from above
            private void rectDemo(Graphics g)  // draw any graphical item on the screen randomly
        }Hi cotton, thanks for your reply, i know how to write a for loop, however im not sure if what i did above is correct... it seems to only create 1 line each time...