java.lang.NullPointerException

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    • java.lang.NullPointerException at java.awt.Container.addImpl(Container.java:1093) at java.awt.Container.add(Container.java:1005) at javax.swing.JFrame.addImpl(JFrame.java:567) at java.awt.Container.add(Container.java:417) at cc.cc.<init>(cc.java:28) at cc.cc.main(cc.java:34)

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