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Start your free trialOrla McGreal
1,625 PointsI keep getting this error : java.lang.NullPointerException at JavaTester.run(JavaTester.java:1
In the code challenge I keep getting this error
java.lang.NullPointerException at JavaTester.run(JavaTester.java:100) at JavaTester.main(JavaTester.java:39)
This is my code - could anyone show me where I am going wrong - I don't really understand the task....
public class Spaceship { public String mType; public String mShuttle;
public Spaceship (){ mType = "SHUTTLE"; }
public Spaceship (String MShuttle){ mShuttle ="Apollo 13"; }
Thanks so much in advance!!
1 Answer
William Laub
7,793 PointsYou second constructor needs to set
mType
to the the argument it receives. e.g.
public Spaceship (String type)
{
mType = type;
}
The null pointer exception is likely causes by the test code calling your second construction and then trying to access mType to ensure it has been set. Since mType is still null it fails.
Orla McGreal
1,625 PointsOrla McGreal
1,625 PointsThank you so much it's beginning to all make sense!!!