j is equal to m j is equal to K K is equal to m
The result of one of the Object being null, will of course cause a NullPointerException.
Part 2:
class Autoboxing
{
public static void main(String[] args)
{
Integer a = 10;
Integer b = 10;
Integer c = 1000;
Integer d = 1000;
System.out.println(a == b); //true
System.out.println(c == d); //false
}
};
{
public static void main(String[] args)
{
Integer a = 10;
Integer b = 10;
Integer c = 1000;
Integer d = 1000;
System.out.println(a == b); //true
System.out.println(c == d); //false
}
};
Please explain.
(Found it in my Linkedin groups "Sun Certified Java Programmer" here)
References
- Most common gotchas in Java
- http://vanillajava.blogspot.nl/2014/02/most-common-gotchas-in-java.html
