dcsimg
 

Submitted by: OCTAVIA ANGHEL(OCTAVIAANGHEL@GMAIL.COM)

Wednesday Nov 7th 2018 by OCTAVIA ANGHEL

Language: Java, Expertise: Beginner - Learn how to test if an object is of a certain type, or a subclass of that type.

Java provides the instanceof operator to test if an object is of a certain type, or a subclass of that type. The program can then choose to cast or not cast that object accordingly.

Object obj = Calendar.getInstance(); 
long time = 0; 
if(obj instanceof Calendar) { 
time = ((Calendar)obj).getTime();
 } 
if(obj instanceof Date) { 
time = ((Date)obj).getTime(); // This line will never be reached, obj is not a Date type. 
}
Home
Mobile Site | Full Site