First value of the local var: 7 Value of the parameter: 7 Second value of the local var: 7
Here is the program again, with a slight change.
Now the invoked method
print() makes a change to its copy of the value
in its formal parameter x.
Recall that this is using call by value which means parameters are used to pass values into a method, but cannot pass anything back to the caller.
class SimpleClass
{
public void print( int x )
{
System.out.println("First value of the parameter: " + x );
x = 100; // local change to the formal parameter
System.out.println("Second value of the parameter: " + x );
}
}
class SimpleTester
{
public static void main ( String[] args )
{
int var = 7;
SimpleClass simple = new SimpleClass();
System.out.println("First value of the local var: " + var );
simple.print( var );
System.out.println("Second value of the local var: " + var );
}
}
Now what is the output of the program?