nullpointer extension
public class C {
private B b = null;
private D d = null;
private E e = null;
public C(B b, E e, D d)
{
this.b = b;
this.e = e;
this.d = d;
}nullpointer extension
public class C {
private B b = null;
private D d = null;
private E e = null;
public C(B b, E e, D d)
{
this.b = b;
this.e = e;
this.d = d;
}nullpointerexception
public class MyClass{
private Object iAmNull;//This is null by default
private Object iAmInitialized=new Object();
public void test(){
System.out.println(iAmInitialized.toString());//prints that object
System.out.println(iAmNull.toString());//throws a NullPointerException
}
}Copyright © 2021 Codeinu
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