Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

  1. ,

    You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

  2. ,

    Can occur when you try to convert a String to a numeric value but the String is not well formatted for the conversion.

java.lang.NumberFormatException: null	at java.lang.Integer.parseInt(Integer.java:415)	at java.lang.Integer.parseInt(Integer.java:497)	at undefined.Lissajous.(Lissajous.java:30)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:494)	at java.lang.Class.newInstance0(Class.java:340)	at java.lang.Class.newInstance(Class.java:293)	at sun.applet.AppletPanel.createApplet(AppletPanel.java:710)	at sun.applet.AppletPanel.runLoader(AppletPanel.java:639)	at sun.applet.AppletPanel.run(AppletPanel.java:319)	at java.lang.Thread.run(Thread.java:595)