Tukukkk

I'm writing a program that's supposed to print text. I need it to be on a JScrollPane and I also need to be able to go to the next page of text by clicking on a next page button.

The only way I can get any text to show up is by adding the text directly to the pane. (line 91 ctPanel.add(bText);)

public class RP extends JPanel{



private Border simpleBorder;

private JPanel iPanel;

private JPanel ctPanel;

private JPanel nPanel;

private JLabel T; 

private JLabel A;

private JLabel P;

private JButton upButton;

private JButton downButton;

public JTextArea bText;

private JScrollPane Scroll;

private String placeholder;



public RP()

{



this.setPreferredSize(new Dimension(720,700));



simpleBorder = BorderFactory.createLineBorder(Color.GRAY);

//this.setBorder(BorderFactory.createTitledBorder(simpleBorder, "R"));

this.setLayout(new BorderLayout());



// start of i panel:



placeholder = new String("nothing right now");



iPanel = new JPanel();

this.add(iPanel, BorderLayout.NORTH);

iPanel.setBorder(BorderFactory.createTitledBorder(simpleBorder, "I"));



T = new JLabel();

T.setText("T: " + placeholder);

iPanel.add(T, BorderLayout.WEST);



A = new JLabel();

A.setText("B: " + placeholder);

iPanel.add(A, BorderLayout.CENTER);



P = new JLabel();

P.setText("P: " + placeholder);

iPanel.add(P, BorderLayout.EAST);





// start of ct panel (RP -> Ct Panel):



ctPanel = new JPanel();

ctPanel.setBorder(BorderFactory.createTitledBorder(simpleBorder, "C"));

ctPanel.setLayout(new BorderLayout());







// Create JScrollPane and add it to Ct Panel

Scroll = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, 

JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);







// create btext area

bText = new JTextArea();

bText.setEditable(false);

bText.setText("Nothing right now.");



//add text to scroll pane

Scroll.add(bText);







//add scroll pane to ct panel

ctPanel.add(Scroll, BorderLayout.CENTER);









//add ct panel to RP

ctPanel.add(bText); // IF I COMMENT THIS OUT, THE TEXT WON'T APPEAR IN THE 

CONTENT PANEL

this.add(ctPanel, BorderLayout.CENTER);



// start of navigation panel:



nPanel = new JPanel();

this.add(nPanel, BorderLayout.SOUTH);

nPanel.setBorder(BorderFactory.createTitledBorder(simpleBorder,"Navigation") 

);



upButton = new JButton();

upButton.setText("Up");

nPanel.add(upButton, BorderLayout.WEST);



downButton = new JButton();

downButton.setText("Down");

nPanel.add(downButton, BorderLayout.EAST);



// revalidate and repaint:  

this.revalidate();

this.repaint(); 

}       





// method to set text in bText JTextField from another class

public void setBText(String text)

{

bText.setText(text);

}



// method to set T info to i panel from another class

public void setTInfo(String text)

{

T.setText("T: " + text);

}



// method to set A info to i panel from another class

public void setAInfo(String text)

{

A.setText("B " + text);

}



}

First of all variable names should NOT start with an upper case character.

Scroll.add(bText);

Don't add components to the scroll pane directly. Components are added to the viewport of the scroll pane using;

//Scroll.add(bText);

scroll.setViewportView( bText );

Also a component can only be added to a single component. So get rid of:

//ctPanel.add(bText);

since you already added the text area to the viewport of the scroll pane.