java.lang.NullPointerException

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    • java.lang.NullPointerException at java.awt.Container.addImpl(Container.java:345) at java.awt.Container.add(Container.java:267) at GridDemo.getJXXqqds_GridField3(GridDemo.java:305) at GridDemo.getJContentPane(GridDemo.java:86) at GridDemo.initialize(GridDemo.java:51) at GridDemo.<init>(GridDemo.java:32) at GridDemo.main(GridDemo.java:369)

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