Tenho um JInternalFrame que carrego dentro de um JDesktopPane, quando eu adiciono esse frame ele tá dando uma exceção que não consigo saber qual o problema.
Exception:
java.lang.NullPointerException
at javax.swing.plaf.basic.BasicTextFieldUI.getBaseline(BasicTextFieldUI.java:109)
at javax.swing.JComponent.getBaseline(JComponent.java:2532)
at javax.swing.GroupLayout$ComponentSpring.getBaseline(GroupLayout.java:3000)
at javax.swing.GroupLayout$BaselineGroup.calculateBaselineAndResizeBehavior(GroupLayout.java:2657)
at javax.swing.GroupLayout$BaselineGroup.calculateSize(GroupLayout.java:2633)
at javax.swing.GroupLayout$Group.calculateMinimumSize(GroupLayout.java:1564)
at javax.swing.GroupLayout$ParallelGroup.calculateMinimumSize(GroupLayout.java:2499)
at javax.swing.GroupLayout$Spring.getMinimumSize(GroupLayout.java:1315)
at javax.swing.GroupLayout$Group.getSpringSize(GroupLayout.java:1602)
at javax.swing.GroupLayout$Group.calculateSize(GroupLayout.java:1593)
at javax.swing.GroupLayout$Group.calculateMinimumSize(GroupLayout.java:1564)
at javax.swing.GroupLayout$Spring.getMinimumSize(GroupLayout.java:1315)
at javax.swing.GroupLayout$Group.getSpringSize(GroupLayout.java:1602)
at javax.swing.GroupLayout$Group.calculateSize(GroupLayout.java:1588)
at javax.swing.GroupLayout$Group.calculateMinimumSize(GroupLayout.java:1564)
at javax.swing.GroupLayout$ParallelGroup.calculateMinimumSize(GroupLayout.java:2499)
at javax.swing.GroupLayout$Spring.getMinimumSize(GroupLayout.java:1315)
at javax.swing.GroupLayout$Group.getSpringSize(GroupLayout.java:1602)
at javax.swing.GroupLayout$Group.calculateSize(GroupLayout.java:1588)
at javax.swing.GroupLayout$Group.calculateMinimumSize(GroupLayout.java:1564)
at javax.swing.GroupLayout$Spring.getMinimumSize(GroupLayout.java:1315)
at javax.swing.GroupLayout.calculateAutopadding(GroupLayout.java:1047)
at javax.swing.GroupLayout.prepare(GroupLayout.java:1038)
at javax.swing.GroupLayout.minimumLayoutSize(GroupLayout.java:875)
at java.awt.Container.minimumSize(Container.java:1651)
at java.awt.Container.getMinimumSize(Container.java:1636)
at javax.swing.JComponent.getMinimumSize(JComponent.java:1716)
at javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneLayout.calculateSize(BasicTabbedPaneUI.java:2287)
at javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneLayout.minimumLayoutSize(BasicTabbedPaneUI.java:2265)
at java.awt.Container.minimumSize(Container.java:1651)
at java.awt.Container.getMinimumSize(Container.java:1636)
at javax.swing.JComponent.getMinimumSize(JComponent.java:1716)
at javax.swing.GroupLayout$ComponentSpring.calculateNonlinkedMinimumSize(GroupLayout.java:2933)
at javax.swing.GroupLayout$ComponentSpring.calculateMinimumSize(GroupLayout.java:2897)
at javax.swing.GroupLayout$Spring.getMinimumSize(GroupLayout.java:1315)
at javax.swing.GroupLayout$ComponentSpring.calculatePreferredSize(GroupLayout.java:2904)
at javax.swing.GroupLayout$Spring.getPreferredSize(GroupLayout.java:1325)
at javax.swing.GroupLayout$Group.getSpringSize(GroupLayout.java:1604)
at javax.swing.GroupLayout$Group.calculateSize(GroupLayout.java:1593)
at javax.swing.GroupLayout$Group.calculatePreferredSize(GroupLayout.java:1568)
at javax.swing.GroupLayout$Spring.getPreferredSize(GroupLayout.java:1325)
at javax.swing.GroupLayout$Group.getSpringSize(GroupLayout.java:1604)
at javax.swing.GroupLayout$Group.calculateSize(GroupLayout.java:1588)
at javax.swing.GroupLayout$Group.calculatePreferredSize(GroupLayout.java:1568)
at javax.swing.GroupLayout$Spring.getPreferredSize(GroupLayout.java:1325)
at javax.swing.GroupLayout$SequentialGroup.setValidSize(GroupLayout.java:1972)
at javax.swing.GroupLayout$Group.setSize(GroupLayout.java:1553)
at javax.swing.GroupLayout.calculateAutopadding(GroupLayout.java:1058)
at javax.swing.GroupLayout.layoutContainer(GroupLayout.java:897)
at java.awt.Container.layout(Container.java:1421)
at java.awt.Container.doLayout(Container.java:1410)
at java.awt.Container.validateTree(Container.java:1507)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validate(Container.java:1480)
at javax.swing.JLayeredPane.addImpl(JLayeredPane.java:213)
at javax.swing.JDesktopPane.addImpl(JDesktopPane.java:470)
at java.awt.Container.add(Container.java:365)
at koala.ui.MDIDesktopPane.add(MDIDesktopPane.java:132)
Código onde ocorre o erro (em MDIDesktopPane.java:132):
Component retval = null;
try {
retval = super.add(frame); // linha 132
} catch (java.lang.NullPointerException ex) {
System.out.println("========= ADICIONANDO O INTERNALFRAME ===========");
ex.printStackTrace();
}
