Thread: Im trying to open a new GUI window by clicking on a button

Hi, im trying to open a new GUI window by clicking on a button. But for now what I manage to do is only get a black window. Here is my code.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TesteWallet extends eWallet implements ActionListener{
 
	  eWallet SetAmt = new eWallet();
	  public String calculated = "Amount is $";
	  private JButton jbtSetMaxAmt = new JButton("Set");
	  private JButton jbtSetExpenditures = new JButton("Set");
	  private JButton jbtExpenditures = new JButton("Detail View");
	  public JButton jbtSetDetailExp = new JButton("Set");
	  private JLabel jlabelCurrentAmt = new JLabel("Current Available Amount");
	  private JLabel jlabelMaxAmt = new JLabel("Maximum Amount $");
	  private JLabel jlabelExpenditures = new JLabel("Expenditures $");
	  public JLabel jlabelFood = new JLabel("Food $");
	  public JLabel jlabelClothing = new JLabel("Clothing $");
	  public JLabel jlabelTransport = new JLabel("Transport $");
	  public JLabel jlabelSavings = new JLabel("Savings $");
	  private JTextField jtextCalculatedAmt = new JTextField(calculated);
	  private JTextField jtextMaxAmt = new JTextField("");
	  private JTextField jtextExpenditures = new JTextField("");
	  public JTextField jtextFood = new JTextField("");
	  public JTextField jtextClothing = new JTextField("");
	  public JTextField jtextTransport = new JTextField("");
	  public JTextField jtextSavings = new JTextField("");
	  private JButton jbtCalculate = new JButton("Calculate");
	  static int jopIcon = JOptionPane.QUESTION_MESSAGE;
 
	  boolean bFlag = true; //state, true means no exception
	  public double cAmt;
 
 
 
	  public TesteWallet(){
 
		  BorderLayout b = new BorderLayout();
		  setLayout(b);
 
		  JPanel p  = new JPanel();
		  JPanel p1 = new JPanel();
		  JPanel p2 = new JPanel();
		  JPanel p3 = new JPanel();
		  //JPanel p4 = new JPanel();
 
 
		  p.setLayout(new GridLayout(3,1));
		  p1.setLayout(new GridLayout(3,1));
		  p2.setLayout(new GridLayout(4,1));
		  p3.setLayout(new GridLayout(3,1));
		  //p4.setLayout(new GridLayout(4,1));
 
 
		  jbtSetMaxAmt.setBackground(Color.yellow);//change background color
		  jbtSetMaxAmt.setForeground(Color.black);//change font color
		  jbtSetExpenditures.setBackground(Color.black);//change background color
		  jbtSetExpenditures.setForeground(Color.red);//change font color
		  jbtCalculate.setBackground(Color.green);//change background color
		  jbtCalculate.setForeground(Color.yellow);//change font color
 
 
 
 
		  p1.add(jlabelMaxAmt);
		  p1.add(jtextMaxAmt);
		  p1.add(jbtSetMaxAmt);
 
		  p2.add(jlabelExpenditures);
		  p2.add(jtextExpenditures);
		  p2.add(jbtSetExpenditures);
		  p2.add(jbtExpenditures);
 
		  p3.add(jlabelCurrentAmt);
		  p3.add(jtextCalculatedAmt);
		  p3.add(jbtCalculate);
 
		  //p4.add(jlabelFood);
		  //p4.add(jtextFood);
		  //p4.add(jlabelClothing);
		  //p4.add(jtextClothing);
		  //p4.add(jlabelTransport);
		  //p4.add(jtextTransport);
		  //p4.add(jtextSavings);
		  //p4.add(jbtSetDetailExp);
 
 
		  p.add(p1);
		  p.add(p2);
		  p.add(p3);
 
 
		  add(p, BorderLayout.CENTER);
 
 
 
		  jbtSetMaxAmt.addActionListener(this);
		  jbtSetExpenditures.addActionListener(this);
		  jbtExpenditures.addActionListener(this);
		  jbtCalculate.addActionListener(this);
 
 
 
	  }	
 
	  public void detailView(){
		  JFrame nFrame = new JFrame("Expenditures");
		  nFrame.setSize(500,300);
		  nFrame.setLocationRelativeTo(null);
		  nFrame.setVisible(true);
 
		  BorderLayout c = new BorderLayout();
		  setLayout(c);
 
 
		  JPanel pM = new JPanel();
		  JPanel p4 = new JPanel();
		  JPanel p5 = new JPanel();
		  JPanel p6 = new JPanel();
		  JPanel p7 = new JPanel();
		  JPanel p8 = new JPanel();
 
		  pM.setLayout(new GridLayout(4,1));
		  p4.setLayout(new GridLayout(2,1));
		  p5.setLayout(new GridLayout(2,1));
		  p6.setLayout(new GridLayout(2,1));
		  p7.setLayout(new GridLayout(2,1));
		  p8.setLayout(new GridLayout(1,1));
 
		  p4.add(jlabelFood);
		  p4.add(jtextFood);
		  p5.add(jlabelClothing);
		  p5.add(jtextClothing);
		  p6.add(jlabelTransport);
		  p6.add(jtextTransport);
		  p7.add(jlabelSavings);
		  p7.add(jtextSavings);
		  p8.add(jbtSetDetailExp);
 
		  pM.add(p5);
		  pM.add(p6);
		  pM.add(p7);
		  pM.add(p8);
 
		  add(pM, BorderLayout.CENTER);
 
	  }
 
 
	  public static void main(String[] args){
 
		  TesteWallet frame = new TesteWallet();
	      //JFrame frame=new JFrame();
	    frame.setTitle("eWallet");
	    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	    frame.setSize(200,400);
	    frame.setVisible( true );
 
 
 
 
 
	    //SetAmt.setCurrentAmt(jtextCurrentAmt);
	   // System.out.println("diaply window, but set is invisible");
	  }
	  /*public static void main(String[] args)
	  {
	    JFrame frame = new JFrame();
	      //sJFrame frame=new JFrame();
	    frame.setTitle("My Simple GUI - Drawing Shapes");
	    frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
	    frame.setSize(400.0,250);
	    JFrame.setVisible(true);
	  }*/
 
 
	@Override
	public void actionPerformed(ActionEvent e) {
		if (e.getSource()==jbtSetMaxAmt){
 
			try
			    {
				 cAmt = Double.parseDouble(jtextMaxAmt.getText());//here, exception may come out
				 if (cAmt < 0){
						jtextMaxAmt.setText("");
						JOptionPane.showMessageDialog(null, "Please Enter A Valid Amount.\n" +
								"Eg Any Number Larger Than '0'.\n");									
						}
			     }catch(/*NumberFormat*/Exception nfe)
			    {
			    	 jtextMaxAmt.setText("");
			    	 JOptionPane.showMessageDialog(null, "Please Enter A Valid Amount.\n" +
						"Eg Any Number Larger Than '0'.\n");
			    }
			     SetAmt.setMaxAmt(cAmt);
 
 
			}
		else if (e.getSource()==jbtSetExpenditures){
 
				try
				    {
					 cAmt = Double.parseDouble(jtextExpenditures.getText());//here, exception may come out
					 if (cAmt < 0){
						 jtextExpenditures.setText("");
						JOptionPane.showMessageDialog(null, "Please Enter A Valid Amount.\n" +
						"Eg Any Number Larger Than '0'.\n");
						}
				     }catch(/*NumberFormat*/Exception nfe)
				    {
				    	 jtextExpenditures.setText("");
				    	 JOptionPane.showMessageDialog(null, "Please Enter A Valid Amount.\n" +
							"Eg Any Number Larger Than '0'.\n");
				    }
				     SetAmt.setExpenditures(cAmt);
				}
 
 
		else if (e.getSource()==jbtExpenditures)
		{
			detailView();
		}
 
		else if (e.getSource()==jbtCalculate)
		{	 
 
			if(SetAmt.getMaxAmt() > 0 )
			{
			 		 if(SetAmt.getExpenditures() > 0)
			 		 {			 						 	 
			 			 cAmt = SetAmt.getMaxAmt() - SetAmt.getExpenditures();			 	 
			 			 SetAmt.setCalculatedAmt(cAmt);
			 			 jtextCalculatedAmt.setText("Amount is $" +cAmt);
			 			 SetAmt.setMaxAmt(cAmt);
			 			if(cAmt>0)
					 	 { 
					 		JOptionPane.showMessageDialog(null, "It Is Safe To Spend Your Money\n");
					 	 }
					 	 else
					 	 {
							JOptionPane.showMessageDialog(null, "WARNING!\n You Have Exceeded Your Spending Limit.\n");
						 }
			 		 }
			 	 	 else
			 	 	 {
			 	 		 JOptionPane.showMessageDialog(null, "Please Enter Your Expenditures Amount.");
			 	 	 }
			 }
			 else
			 {
			 		JOptionPane.showMessageDialog(null, "Please Enter Your Maximum Amount.");			 		
			 }			 	 
 
 
		}
 
 
 
 
 
 
 
	}
	}

Do you have a question associated with this? What do you expect to happen, with what components?

For future reference, please post an SSCCE, and please use the code tags. I recommend editing your post and flanking the source code with [highlight=java]Your Code Here[/highlight]