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Thread: problem with my JFrame; JFrame not closing and stay in background

  1. #1
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    Default problem with my JFrame; JFrame not closing and stay in background

    Hi to all,
    I am having problem with my JFrame.
    When I click on "Back" button, the classroom details menu appears but the classroom input JFrame stays in the background.
    Please help me to correct it.

    Here is my code::
    import java.awt.*; 
    import java.awt.event.*; 
    import java.sql.Connection; 
    import java.sql.DriverManager; 
    import java.sql.ResultSet; 
    import java.sql.SQLException; 
    import java.sql.Statement; 
     
    import javax.swing.*; 
    import javax.swing.text.MaskFormatter; 
     
    import java.util.Date; 
    import java.util.regex.Matcher; 
    import java.util.regex.Pattern; 
    import java.text.DateFormat; 
    import java.text.ParseException; 
    import java.text.SimpleDateFormat; 
     
    import java.sql.*; 
    import javax.*; 
     
    public class addclassroom extends JFrame{ 
    public JTextField txt_classno,txt_bname,txt_size,txt_resources; 
    public JComboBox cmbfloor; 
    public JLabel label1, label2, label3, label4, label5, label6; 
    public JButton Save; 
    public JButton Reset; 
    public JButton Back; 
     
    public addclassroom(){ 
     
     
    label1 = new javax.swing.JLabel(); 
    label1.setFont(new java.awt.Font("Verdana", 3, 14)); // NOI18N 
    label1.setForeground(Color.BLACK); 
    label1.setText("Classroom Records Input"); 
     
     
    label2 = new javax.swing.JLabel("Classroom_No:"); 
    txt_classno = new javax.swing.JTextField(8); 
     
    label3 = new javax.swing.JLabel("Building Name:"); 
    txt_bname = new javax.swing.JTextField(15); 
     
    label4 = new javax.swing.JLabel("Building Floor:"); 
    String floor[] = {"Ground floor","1st floor","2nd floor","3rd floor","4th floor", "5th floor", "6th floor", "7th floor", "8th floor"}; 
    cmbfloor = new javax.swing.JComboBox(floor); 
     
    label5 = new javax.swing.JLabel("Size Capacity:"); 
    txt_size = new javax.swing.JTextField(5); 
     
     
    label6 = new javax.swing.JLabel("Resources"); 
    txt_resources = new javax.swing.JTextField(20); 
     
     
     
     
    Save = new javax.swing.JButton(); 
    Save.setText("Save"); 
     
    Reset = new javax.swing.JButton(); 
    Reset.setText("Reset"); 
     
    Back = new javax.swing.JButton(); 
    Back.setText("Back"); 
     
     
    label1.setBounds(100, 25, 200, 50); 
     
    label2.setBounds(50, 100, 100, 50); 
    txt_classno.setBounds(180, 100, 100, 30); 
     
     
     
    label3.setBounds(50, 150, 100, 50); 
    txt_bname.setBounds(180, 150, 140, 30); 
     
    label4.setBounds(50, 200, 100, 50); 
    cmbfloor.setBounds(180, 200, 115, 30); 
     
     
     
    label5.setBounds(50, 250, 100, 50); 
    txt_size.setBounds(180, 250, 65, 30); 
     
     
     
    label6.setBounds(50, 300, 100, 50); 
    txt_resources.setBounds(180, 300, 175, 30); 
     
     
     
    Save.setBounds(100, 400, 75, 20); 
    Reset.setBounds(200, 400, 75, 20); 
    Back.setBounds(300,400,75,20); 
     
    JFrame ciFrame = new JFrame("Classroom Records Input Form"); 
     
    ciFrame.add(label1); 
    ciFrame.add(label2); 
    ciFrame.add(txt_classno); 
    ciFrame.add(label3); 
    ciFrame.add(txt_bname); 
    ciFrame.add(label4); 
    ciFrame.add(cmbfloor); 
    ciFrame.add(label5); 
    ciFrame.add(txt_size); 
    ciFrame.add(label6); 
    ciFrame.add(txt_resources); 
     
    ciFrame.add(Save); 
     
    ciFrame.add(Reset); 
    ciFrame.add(Back); 
     
     
    ciFrame.setLayout(null); 
     
    ciFrame.setVisible(true); 
     
    ciFrame.setSize(500, 500); 
     
    ciFrame.setResizable(false); 
     
    ciFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);	
     
     
    Save.setMnemonic('S'); 
    Save.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) 
    { 
    Save.setEnabled(true); 
    } 
    }); 
     
    Reset.setMnemonic('R'); 
    Back.setMnemonic('B'); 
     
    Handleraddclassroom h = new Handleraddclassroom(); 
    Save.addActionListener(h); 
    Reset.addActionListener(h); 
    Back.addActionListener(h); 
     
     
    } 
     
     
    public class Handleraddclassroom implements ActionListener{ 
    public void actionPerformed(ActionEvent event){ 
     
    String name = ((JButton)event.getSource()).getText(); 
     
     
    if (name.equals("Back")){ 
    dispose(); 
     
    Classroomdetails cm = new Classroomdetails(); 
     
     
    } 
     
     
    if (name.equals("Reset")){ 
     
    txt_classno.setText(""); 
    txt_bname.setText(""); 
    txt_size.setText(""); 
    txt_resources.setText(""); 
     
     
    } 
     
    if (name.equals("Save")){ 
    String filename = "C:/JAVA/schedule.accdb"; 
    String database = "jdbcdbc:scheduling"; 
     
    //Character & Presence checks 
     
    String nsize = txt_size.getText(); 
    String rsc = txt_resources.getText(); 
     
    Pattern p = Pattern.compile("[A-Z,a-z,&%$@!()*^]"); 
    Matcher Cnsize = p.matcher(nsize); 
     
    Pattern q = Pattern.compile("[A-Z,a-z,&%$@!()*^]"); 
    Matcher Rsc = q.matcher(rsc); 
     
     
    if(txt_classno.getText().equals("")){ 
    JOptionPane.showMessageDialog(addclassroom.this,"Classroom No field should not be blank"); 
     
    } 
     
    if(txt_bname.getText().equals("")){ 
    JOptionPane.showMessageDialog(addclassroom.this,"Building Name field should not be blank"); 
     
    } 
     
    if(txt_size.getText().equals("")){ 
    JOptionPane.showMessageDialog(addclassroom.this,"Size Capacity field should not be blank"); 
     
    }else if(Cnsize.find()){ 
    JOptionPane.showMessageDialog(addclassroom.this,"Invalid value for Size capacity entered. Please check again"); 
     
    } 
     
     
     
     
    if(txt_resources.getText().equals("")){ 
    JOptionPane.showMessageDialog(addclassroom.this,"Resources field should not be blank"); 
     
    }else if(!Rsc.find()){ 
    JOptionPane.showMessageDialog(addclassroom.this,"Invalid value for Resources entered. Please check again"); 
    } 
     
     
    else{ 
    try { 
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); 
     
     
    Connection con = DriverManager.getConnection(database ,"","");	//username &password not being used 
     
    String flr=""; 
    if(cmbfloor.getSelectedIndex()==0){ 
    flr="Ground floor"; } 
    else if(cmbfloor.getSelectedIndex()==1){ 
    flr="1st floor";} 
     
    else if(cmbfloor.getSelectedIndex()==2){ 
    flr="2nd floor";} 
    else if(cmbfloor.getSelectedIndex()==3){ 
    flr="3rd floor";} 
    else if(cmbfloor.getSelectedIndex()==4){ 
    flr="4th floor";} 
    else if(cmbfloor.getSelectedIndex()==5){ 
    flr="5th floor";} 
    else if(cmbfloor.getSelectedIndex()==6){ 
    flr="6th floor";} 
    else if(cmbfloor.getSelectedIndex()==7){ 
    flr="7th floor";} 
    else if(cmbfloor.getSelectedIndex()==8){ 
    flr="8th floor";} 
     
     
    Statement s = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); //The Result set can now scroll forward and back 
     
    String sql = "INSERT INTO classroom VALUES('" 
     
    + txt_classno.getText()+ "','" 
    + txt_bname.getText() + "','" 
     
    + flr + "','" 
    + txt_size.getText() + "','" 
    + txt_resources.getText()+ "' )"; 
     
    JOptionPane.showMessageDialog(addclassroom.this,"Classroom Records Saved."); 
    dispose(); 
     
    addclassroom ac = new addclassroom(); 
     
     
    s.execute(sql); 
     
     
     
    s.close(); 
    con.close(); 
     
    } catch (Exception e) {System.out.print("Error: " + e);} 
    } 
    } 
    }	
     
     
    } 
     
     
     
    }
    Last edited by helloworld922; November 6th, 2012 at 01:27 AM.


  2. #2
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    Default Re: problem with my JFrame; JFrame not closing and stay in background

    Yikes, that sure is a lot of code for simply displaying two JFrames. I highly suggest you put together an SSCCE that we can look at instead.

    Also, it sounds like you might be looking for CardLayout.
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