CODEWITHSUNDEEP
javaswinglayoutjscrollpane
Siva Subramaniam
Siva Subramaniam

Reputation: 124

JScrollPane doesn't work.. Why?

I've a Frame which has two internal frames. I create a 'Board' object which is an instance of Board class. Board class extends JPanel.

class Layout extends JFrame{
   Dimension dimen=Toolkit.getDefaultToolkit().getScreenSize();
   public initializeWindows(){
       JInternalFrame dev=new JInternalFrame("Devices",true,true,false,false);
       JInternalFrame cir=new JInternalFrame("Circuit",true,true,false,false);
       Board b=new Board();
       cir.add(b);
       JScrollPane scroll=new JScrollPane(b);
       this.add(dev);
       this.add(cir);

       dev.setVisible(true);
       dev.setSize(150,650);
       dev.setLocation(0,100);
       dev.pack();

       inf.setVisible(true);
       inf.setPreferredSize(new Dimension((int)(dimen.width*0.88),(int)(dimen.height*0.75)));
       inf.setLocation(150,100);
       inf.setBackground(Color.WHITE);
       inf.pack();

   }

But the scrollpane does not appear. Why is tat??

Upvotes: 0

Views: 746

Answers (2)

Nitin Chhajer
Nitin Chhajer

Reputation: 2339

please set cir.setVisible(true) and cir.add(scroll) instead of cir.add(b);

If you want your scroll bars to be visible all times you can use 

scroll = JScrollPane(b,
  ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
  ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS)

Upvotes: 1

Jack
Jack

Reputation: 133669

Because you are not adding the JScrollPane to the internal frame.

You are actually adding the Board to the JInternalFrame cir and to the JScrollPane while you should do something like

JInternalFrame cir=new JInternalFrame("Circuit",true,true,false,false);
Board b=new Board();
JScrollPane scroll=new JScrollPane(b);
cir.add(scroll)
this.add(cir);

Upvotes: 1

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