Java Complete Tutorial Ep. 23 - Returning Objects

In this episode of the Java Tutorial, I show you how to return objects inside of your methods.
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[spenceremmanuel]

Whoever that is interested to understand Kody better please see the example below.

A method can return any type of data, including class types that you create. For example, in
the following program, the incrByTen( ) method returns an object in which the value of a is
ten greater than it is in the invoking object.
// Returning an object.
class Test {
int a;
Test(int i) {
a = i;
}
Test incrByTen() {
Test temp = new Test(a+10);
return temp;
}

}
class RetOb {
public static void main(String args[]) {
Test ob1 = new Test(2);
Test ob2;
ob2 = ob1.incrByTen();
System.out.println("ob1.a: " + ob1.a);
System.out.println("ob2.a: " + ob2.a);
ob2 = ob2.incrByTen();
System.out.println("ob2.a after second increase: "
+ ob2.a);
}
}
The output generated by this program is shown here:
ob1.a: 2
ob2.a: 12
ob2.a after second increase: 22

As you can see, each time incrByTen( ) is invoked, a new object is created, and a reference
to it is returned to the calling routine.
The preceding program makes another important point: Since all objects are dynamically
allocated using new, you don’t need to worry about an object going out-of-scope because the
method in which it was created terminates. The object will continue to exist as long as there is
a reference to it somewhere in your program. When there are no references to it, the object will
be reclaimed the next time garbage collection takes place.

[ksaykov]

You helped me more than the university.

[speedflash]

3:35 We can just return a new object and we dont need to create a temporary one:
return new Number(this.number * this.number);

[Blckops]

Im confused on how the number is 5 ? Where is 5 assigned ?

[romanmendelson]

i just can't understand what's going on. I want to die