Basic doubts in java

[Ssunishtha (Sunishtha Singh)]

Exception in thread “main” java.lang.NullPointerException
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1838)
at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
at java.lang.Double.parseDouble(Double.java:538)
at Main.main(Main.java:9)

[vivek21 (Vivek Aggarwal)]

Please attach you source code also.