java.lang.IllegalArgumentException

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  • Component must be not null - Java SWING
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    • java.lang.IllegalArgumentException: Component must be non-null at javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2953) at javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2933) at javax.swing.GroupLayout$Group.addComponent(GroupLayout.java:1524) at javax.swing.GroupLayout$ParallelGroup.addComponent(GroupLayout.java:2484) at javax.swing.GroupLayout$ParallelGroup.addComponent(GroupLayout.java:2454) at javax.swing.GroupLayout$Group.addComponent(GroupLayout.java:1505) at javax.swing.GroupLayout$ParallelGroup.addComponent(GroupLayout.java:2476) at GroupedLayout2x2.<init>(GroupedLayout2x2.java:32) at GroupedLayout2x2.main(GroupedLayout2x2.java:61)

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