user1725495
Reputation:
JFrame stays in background instead of closing
I am having problem with my JFrame. When I click on "Back" button, the "Classroomdetails" menu appears but the classroom input JFrame form (addclassroom) stays in the background instead of closing Please help me to correct it.
Here is my code::
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 = "jdbc:odbc: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);}
}
}
}
}
}
Upvotes: 0
Views: 168
Answers (2)
Dan D.
Reputation: 32391
Your code is confusing because your main class extends JFrame, but you are also creating an internal JFrame called ciFrame which is the one that is actually displayed.
A quick fix would be to move the declaration of the ciFrame next to the JButton Back (don't make this public and call it back, not Back). Then, instead of dispose() do ciFrame.dispose();
Long term, please change your code such as you either extend JFrame and only use this instance of the JFrame or create one as a variable and don't extend JFrame.
I don't like posting 100s of line of code, but here it is, your code, modified to work:
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;
JFrame ciFrame = new JFrame("Classroom Records Input Form");
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);
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 static void main(String[] args) {
new addclassroom();
}
public class Handleraddclassroom implements ActionListener {
public void actionPerformed(ActionEvent event) {
String name = ((JButton) event.getSource()).getText();
if (name.equals("Back")) {
ciFrame.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 = "jdbc:odbc: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);
}
}
}
}
}
}
Upvotes: 2
user1725495
Reputation:
public class addclassroom
{
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.DISPOSE_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")){
Classroomdetails cm = new Classroomdetails();
dispose();
}
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 = "jdbc:odbc: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(null,"Classroom No field should not be blank");
}
if(txt_bname.getText().equals("")){
JOptionPane.showMessageDialog(null,"Building Name field should not be blank");
}
if(txt_size.getText().equals("")){
JOptionPane.showMessageDialog(null,"Size Capacity field should not be blank");
}else if(Cnsize.find()){
JOptionPane.showMessageDialog(null,"Invalid value for Size capacity entered. Please check again");
}
if(txt_resources.getText().equals("")){
JOptionPane.showMessageDialog(null,"Resources field should not be blank");
}else if(!Rsc.find()){
JOptionPane.showMessageDialog(null,"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(null,"Classroom Records Saved.");
s.execute(sql);
s.close();
con.close();
} catch (Exception e) {System.out.print("Error: " + e);}
}
}
}
}
private void dispose() {
}
}
Upvotes: 2
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