Databases
StackOverflow2013
Postsdbo
POI have a JApplet which has to display 3 Components. (2 JPanels and 1 Paint Method)
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POI have a JApplet which has to display 3 Components. (2 JPanels and 1 Paint Method)
    primarykey
    data
    text
    <p>I have an assignment in which I have to allow a user to plot a graph using a quadratic equation.</p> <p>I managed to draw the skeleton of the graph, and now I am trying to display the "control panel" for the user to input the values.</p> <p>I have 4 files:</p> <ul> <li><code>graph.java</code></li> <li><code>panel.java</code></li> <li><code>panelB.java</code></li> <li><code>panelC.java</code></li> </ul> <p>My problem is when I run the code it is displaying only the <code>panel.java</code> even in the container where it should display the other two panels.</p> <h3>panel.java</h3> <pre><code>import java.awt.Dimension; import java.awt.Graphics; import java.awt.*; import java.awt.geom.*; import javax.swing.JPanel; public class panel extends JPanel { public panel(){ this.setBackground(Color.yellow); } } </code></pre> <p>Can anyone please advise what changes I should do to fix this problem?</p> <p>I have done some changes to the graph.java file:</p> <pre><code>import java.awt.BorderLayout; import java.awt.Container; import java.awt.Dimension; import javax.swing.*; public class GraphApplet extends JApplet{ public GraphApplet(){ raph p = new Graph();//graph p.setPreferredSize(new Dimension(760,500)); conn.add(p,BorderLayout.CENTER); } </code></pre> <p>And now all that is being displayed is the graph.</p> <p>Regarding the other code, I also made some changes to the class names:</p> <p><strong>gnjk;.java</strong></p> <pre><code>import java.awt.Dimension; import java.awt.Graphics; import java.awt.*; import java.awt.geom.*; import javax.swing.JPanel; public class Graph extends JPanel { public Graph(){ this.setBackground(Color.yellow); } public void paintComponent(Graphics p) { super.paintComponent(p); Graphics2D graph = (Graphics2D)p; this.setBackground(Color.yellow);//set background color. int x,y,y1,x1,a,b,p1x,p1y,p2x,p2y; int xstart = 7; int ystart = 1; int xfinish = 3; </code></pre> <p>.......</p> <p><strong>bhfvhn.java</strong></p> <pre><code>import javax.swing.*; import java.awt.*; import javax.swing.JPanel; public class ControlsA extends JPanel{ public void init (Box g) { a = Box.createVerticalBox(); a.add(new JLabel("Please enter the values below:")); a.add(new JLabel("h")); } } </code></pre> <p><strong>jknmk.java</strong></p> <pre><code>import javax.swing.*; import java.awt.Component; import java.awt.Dimension; public class ControlsB extends JPanel{ public void init (Box b) { b = Box.createHorizontalBox(); b.add(new JLabel("a")); JTextField f1 = new JTextField("0.0"); f1.setMaximumSize(new Dimension(100,30)); b.add(f1); } } </code></pre> <hr> <p>Here is an updated to my project:</p> <p><strong>jkl.java</strong></p> <pre><code>import java.awt.BorderLayout; import java.awt.Container; public class GraphApplet extends JApplet{ public GraphApplet() { public void init(){ SwingUtilities.invokeLater(new Runnable() { public void run(){ Container conn = getContentPane(); conn.setLayout(new BorderLayout()); Graph z = new Graph(); conn.add(p,BorderLayout.CENTER); fasfae a = new ControlsA(box1); conn.add(a,BorderLayout.LINE_START); adsfawef b = new ControlsB(box2); conn.add(b,BorderLayout.PAGE_END); } }); } } /*Container conn = getContentPane(); conn.setLayout(new BorderLayout()); Graph p = new Graph();//graph p.setPreferredSize(new Dimension(460,560)); conn.add(p,BorderLayout.CENTER); Box a = new Box(BoxLayout.Y_AXIS); a.setPreferredSize(new Dimension(50,50)); conn.add(a,BorderLayout.EAST); Box b = new Box(BoxLayout.X_AXIS); b.setPreferredSize(new Dimension(201,50)); conn.add(b,BorderLayout.SOUTH);*/ //this code is commented not to loose it </code></pre> <p><strong>vtk.java</strong></p> <pre><code>import java.awt.Dimension; import java.awt.Graphics; import java.awt.*; import java.awt.geom.*; import javax.swing.JPanel; class Graph extends JPanel { public Graph(){ this.setBackground(Color.yellow); } @Override public Dimension getPreferredSize(){return (new Dimension(460,560)); } public void paint(Graphics z) { Graphics graph = (Graphics2D)z; this.setBackground(Color.yellow). int x,y,y1,x1,a,b,p1x,p1y,p2x,p2y; //line co-ordinates //the numbers represent the number of boxes on the graph int xstart = 7; int ystart = 1; int x = 3; int y = 9; //other variables int i = 0; int i2 = 0; int m = 0; int n = 0; int m2 = 0; int n2 = 0; int f2 = 0; int g2 = 1; //ranges int f = 5; int g = -5; //change -ve num to +ve int g3 = Math.abs(g); int a1 = g3 + f; int b1 = a1; a = (Height); f = (Width); } } } // 6 variables the user has to input } @Override public Dimension getPreferredSize() {return (new Dimension(200,100));} } </code></pre> <p><strong>nllkl.java</strong></p> <pre><code> @Override public Dimension getPreferredSize(){return (new Dimension(201,50));} } </code></pre> <p>Still no improvement. I cannot understand what is going on.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USBill the Lizard
    1. USMatthew
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POI have a JApplet which has to display 3 Components. (2 JPanels and 1 Paint Method)
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POI have a JApplet which has to display 3 Components. (2 JPanels and 1 Paint Method)
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThat applet is adding 3 instances of `panel` as opposed to on each of `panel`, `panelB` & `panelC`.
      singulars
      1. POI have a JApplet which has to display 3 Components. (2 JPanels and 1 Paint Method)
      1. USAndrew Thompson
    2. COBTW - *"I have an assignment"* Were you told to make it as an applet? If not, make a `JFrame` instead. If so, ask the tutor 'why an applet?'. They are harder to develop, debug & deploy, and not something that should be attempted by students, or in any situation where you don't want to cram a perfectly good rich client into a web page (which is an odd mixture at the best of times).
      singulars
      1. POI have a JApplet which has to display 3 Components. (2 JPanels and 1 Paint Method)
      1. USAndrew Thompson
    3. COyes it has to be an applet specifically :S
      singulars
      1. POI have a JApplet which has to display 3 Components. (2 JPanels and 1 Paint Method)
      1. USMatthew
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload