Welcome to the Java Programming Forums


The professional, friendly Java community. 21,500 members and growing!


The Java Programming Forums are a community of Java programmers from all around the World. Our members have a wide range of skills and they all have one thing in common: A passion to learn and code Java. We invite beginner Java programmers right through to Java professionals to post here and share your knowledge. Become a part of the community, help others, expand your knowledge of Java and enjoy talking with like minded people. Registration is quick and best of all free. We look forward to meeting you.


>> REGISTER NOW TO START POSTING


Members have full access to the forums. Advertisements are removed for registered users.

Results 1 to 3 of 3

Thread: How to display a Rectangle object in JFrame (Problem).

  1. #1
    Junior Member
    Join Date
    Apr 2010
    Posts
    23
    Thanks
    5
    Thanked 0 Times in 0 Posts

    Default How to display a Rectangle object in JFrame (Problem).

    The frame is displayed empty,, so how to make the Rectangle object visible

    package rectang;
     
    import javax.swing.*;
    import java.awt.*;
    import java.awt.Graphics.*;
     
    public class RectAn extends JFrame
    {
     
       public void paint(Graphics g)
       {
          super.paint(g);
          Rectangle r1 = new Rectangle(); //Here is the object I mean. 
          r1.setBounds(20, 20, 40, 50);    //Setting its bounds.
       }
     
       public RectAn(String title)
       {
          super(title);
          this.setSize(400, 400);
          setDefaultCloseOperation(EXIT_ON_CLOSE);
       }
    }

    Main method


    package rectang;
     
    public class RectanG
    {
     
       public static void main(String[] args)
       {
          RectAn r = new RectAn("Rectangle");
          r.setVisible(true);
       }
    }


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
    Join Date
    Oct 2010
    Location
    Washington, DC
    Posts
    5,424
    My Mood
    Hungover
    Thanks
    144
    Thanked 636 Times in 540 Posts

    Default Re: How to display a Rectangle object in JFrame (Problem).

    You never actually draw anything. Check out the Graphics API for useful functions.

    Recommended reading: Lesson: Performing Custom Painting (The Java™ Tutorials > Creating a GUI With JFC/Swing)
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
    Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!

  3. #3
    Junior Member
    Join Date
    Jun 2012
    Location
    Birmingham
    Posts
    20
    My Mood
    Depressed
    Thanks
    0
    Thanked 5 Times in 5 Posts

    Default Re: How to display a Rectangle object in JFrame (Problem).

    you need to add

    g.drawRect(nameofrect, x,y,width,height);

    but do not just use this find out why and use the API docs so you can
    find out why you need to use this method, although pretty self explanatory.
    Just be nice.

Similar Threads

  1. JList display problem
    By Poseidon in forum AWT / Java Swing
    Replies: 3
    Last Post: February 19th, 2012, 08:37 AM
  2. Replies: 3
    Last Post: November 10th, 2011, 07:11 AM
  3. Replies: 2
    Last Post: October 31st, 2011, 09:19 AM
  4. investment interest display problem
    By df75douglas in forum What's Wrong With My Code?
    Replies: 3
    Last Post: June 4th, 2011, 07:32 AM
  5. GridBagLayout display problem
    By mjpam in forum What's Wrong With My Code?
    Replies: 0
    Last Post: May 5th, 2011, 04:58 PM