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which method will be called

aruna makhija
Greenhorn

Joined: Dec 07, 2000
Posts: 17
Hi friends,
This is my first post! I was unable to find a good description of this topic in RH and Bill Brodgen's Exam Cram. Will the JLS be helpful ? Do you think we should study the JLS real well before taking the exam ?
Thanks,
Aruna
Please tell me What is the result of executing the following code:
class Test {
public static void main(String[] args) {
Test t = new Test();
t.test(1.0, 2L, 3);
}
void test(double a, double b, short c) {
System.out.println("1");
}
void test(float a, byte b, byte c) {
System.out.println("2");
}
void test(double a, double b, double c) {
System.out.println("3");
}
void test(int a, long b, int c) {
System.out.println("4");
}
void test(long a, long b, long c) {
System.out.println("5");
}
}
Ragini Kelkar
Greenhorn

Joined: Oct 19, 2000
Posts: 9
The test method is called with(1.0,2L,3) which is
(double,long,int)
Since there is no test method that exactly matches this it will select the one that will promote the parameters passed to the required values.
Hence it will call test(double,double,double)
Hence it will promote long and int to double.
It will print 3.
Jane Griscti
Ranch Hand

Joined: Aug 30, 2000
Posts: 3141
Aruna,
You might want to read JLS§5.3 Method Invocation Conversion.
It doesn't hurt to through the JLS; it has a number of code examples that are worth working through.
Hope that helps.
------------------
Jane
The cure for boredom is curiosity.
There is no cure for curiosity.
-- Dorothy Parker


Jane Griscti
SCJP, Co-author Mike Meyers' Java 2 Certification Passport
 
Consider Paul's rocket mass heater.
 
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