[Solved] Default text in JTextArea

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It is setting default text. I’ve done it as bellow.

public class BisectionIterations extends JFrame
implements ActionListener {

private JTextArea textArea = new JTextArea("This text should display");
private JScrollPane scrollPane = new JScrollPane(textArea);
private JButton closeBtn = new JButton("Close");
//Array
Double[] iterationBi = new Double[1000];

public BisectionIterations(Double[] iter) {
this.iterationBi = iter;
setLayout(new BorderLayout());
setSize(500, 400);
setTitle("Bisection Method Iterations");
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setLocationRelativeTo(null);
setResizable(false);

JPanel middle = new JPanel(new FlowLayout());
middle.add(scrollPane);
textArea.setEditable(false);
textArea.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 12));
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
scrollPane.setPreferredSize(new Dimension(490, 330));
add("Center", middle);

JPanel bottom = new JPanel(new FlowLayout());
middle.add(closeBtn);
closeBtn.addActionListener(this);
add("South", bottom);
displayIterations();

setVisible(true);
}

public void actionPerformed(ActionEvent e) {
if (e.getSource() == closeBtn) {
    dispose();
}
}

public void displayIterations() {
String j = "";
for (int i = 1; i < 999; i++) {
    if (iterationBi[i] == null) {

    } else {
        j += "Approximation for iteration '" + i + "' = " +iterationBi[i] + "\n";
    }
}
//textArea.setText(j);
}

public static void main(String args[]){
Double s[];
s = new Double[1000];
for(int i=0;i<1000;i++) {
    s[i]=(double)i;
}
BisectionIterations b=new BisectionIterations(s);
}
}

Now if I remove comment
//textArea.setText(j);
It will overwrite the default text we’ve set.

It is actually setting default text but you are note able to see that since it is overwritten by Approximation for iteration……

solved Default text in JTextArea