Solved

passing objects

Posted on 2012-03-14
1
194 Views
Last Modified: 2012-03-14
If I instantiate an object in my application's main class, and then pass it to the constructor of another class which will need to use it, does the copy/assignment of the object to something local actually make another object?
Generic example below:
Class A {
ClassB B = new ClassB();
ClassC C = new ClassC(B);
}

Class C {
ClassB localB = null;
Class C (ClassB B) {
  localB = B;
}
}
0
Comment
Question by:dpalyca755
1 Comment
 
LVL 1

Accepted Solution

by:
nareshvoota earned 500 total points
ID: 37723038
Java is always pass by value but when you pass a reference to a method, the reference gets copied over. But it still points to the old object.

Please read this discussion in stackoverflow

http://stackoverflow.com/questions/40480/is-java-pass-by-reference

In your case,  localB is referring to the new class B object that is made in class A.

Hope this helps.
0

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
tomcat not starting 6 68
MySqlDump not dumping triggers 1 43
ejb wildfly example 2 20
Java 8 to Java 6 8 20
Java functions are among the best things for programmers to work with as Java sites can be very easy to read and prepare. Java especially simplifies many processes in the coding industry as it helps integrate many forms of technology and different d…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question