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How to make a copy of a whole object holding multiple parts in an exception safe manner?

by: fresherlab on Date: Sat, 31 Jul 2010 Time: 9:21 AM

Java training
Java's unique architecture enables programmers to develop a single application that can run across multiple platforms seamlessly and reliably. In developing java application in web, Java training you gains extensive experience with Java and its object-oriented features. You get Java training to create robust console and GUI applications and store and retrieve data from relational databases.
This article ensured that if construction of the whole object failed, the resources of all fully constructed parts were released. Careful use of try/finally blocks and statement ordering - essentially, like this:
public class Part implements Cloneable
{
...
public void dispose();
}

public class Whole
{
...
public void copy(Whole other)
{
Part t1 = (Part)other.p1.clone();
if (t1 != null) {
try {
Part t2 = (Part)other.p2.clone();
if (t2 != null) {
t1.setParent(this);
t2.setParent(this);

// pivot point

Part swap1 = t1;
t1 = p1;
p1 = swap1;

Part swap2 = t2;
t2 = p2;
p2 = swap2;
}
}
finally {
t2.dispose();
}
}
finally {
t1.dispose();
}
}

private Part p1, p2; // never null
}
The exception safety guarantees make sense in Java and should be applied when writing or reviewing code. The problem is that the Java language offers almost no in-built support for this activity. In design, as in life, you learn more from making the journey than you do from reaching the destination.

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Fresherlab.com is a young organization, based at India’s IT hub, Bangalore.
It's a dynamic and competitive world with full of ups and downs in IT sector and therefore; the fresh engineers require just more than theoretical knowledge to get themselves ready for the industry. Academic institutions across the world provide the basic and conceptual fundamentals covering multiple areas in computer science. With increasing number of graduating engineers, but with constant number of companies, it becomes difficult for fresh engineers to compete with their unpolished skills because they need more effective and specialized quality training.

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