I have an application that is validating when the JInternalFrame window is open or closed, but if the window is opened and closed a few times in a row, the console displays an error and does not open JInternalFrame again. >
WindowwithJDesktopPane:
packagejanelas;publicclassdesktopextendsjavax.swing.JFrame{privateframeInternoregister;publicdesktop(){initComponents();}privatevoidinitComponents(){painelDesktop=newjavax.swing.JDesktopPane();btnAbrirFrame=newjavax.swing.JButton();setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);javax.swing.GroupLayoutpainelDesktopLayout=newjavax.swing.GroupLayout(painelDesktop);painelDesktop.setLayout(painelDesktopLayout);painelDesktopLayout.setHorizontalGroup(painelDesktopLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0,0,Short.MAX_VALUE));painelDesktopLayout.setVerticalGroup(painelDesktopLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0,260,Short.MAX_VALUE));btnAbrirFrame.setText("Abrir Frame");
btnAbrirFrame.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnAbrirFrameActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(painelDesktop)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(301, Short.MAX_VALUE)
.addComponent(btnAbrirFrame)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(painelDesktop, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(btnAbrirFrame)
.addGap(0, 11, Short.MAX_VALUE))
);
pack();
}
private void btnAbrirFrameActionPerformed(java.awt.event.ActionEvent evt) {
if (register == null) {
register = new frameInterno();
}
if (!register.isVisible()) {
painelDesktop.add(register);
register.setVisible(true);
}
register.toFront();
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new desktop().setVisible(true);
}
});
}
private javax.swing.JButton btnAbrirFrame;
private javax.swing.JDesktopPane painelDesktop;
}
JInternalFrame window:
package janelas;
public class frameInterno extends javax.swing.JInternalFrame {
public frameInterno() {
initComponents();
}
private void initComponents() {
btnSair = new javax.swing.JButton();
btnSair.setText("Sair");
btnSair.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnSairActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(300, Short.MAX_VALUE)
.addComponent(btnSair)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(200, Short.MAX_VALUE)
.addComponent(btnSair)
.addContainerGap())
);
pack();
}
private void btnSairActionPerformed(java.awt.event.ActionEvent evt) {
this.dispose();
}
private javax.swing.JButton btnSair;
}
Error (exception):
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: illegal component position at java.awt.Container.addImpl(Container.java:1100) at javax.swing.JLayeredPane.addImpl(JLayeredPane.java:231) at javax.swing.JDesktopPane.addImpl(JDesktopPane.java:484) at java.awt.Container.add(Container.java:417) at janelas.desktop.btnAbrirFrameActionPerformed(desktop.java:63) at janelas.desktop.access$000(desktop.java:3) at janelas.desktop$1.actionPerformed(desktop.java:31) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6533) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at java.awt.Component.processEvent(Component.java:6298) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466) at java.awt.Container.dispatchEventImpl(Container.java:2280) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.awt.EventQueue$4.run(EventQueue.java:729) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
