java.lang.NullPointerException

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    • java.lang.NullPointerException at java.io.Writer.<init>(Writer.java:70) at java.io.PrintWriter.<init>(PrintWriter.java:69) at java.io.PrintWriter.<init>(PrintWriter.java:57) at Fourier$1.<init>(Fourier.java:16) at Fourier.main(Fourier.java:15)

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