1.What will display from the following program when it is compiled and executed?
ID: 3752867 • Letter: 1
Question
1.What will display from the following program when it is compiled and
executed? Hint: It does compile clean. No partial credit. Must be exactly
what displays.
import java.util.StringTokenizer
public class CountEm
{
public static void main(String args [])
{
String spock = "Live long and prosper"
StringTokenizer trekkie = new StringTokenizer(spock, "vp")
String trash = trekkie.nextToken()
System.out.println(trekkie.nextToken())
} // end main method
} // end class CountEm
the answer is e long and
explain why the answer is “ e long and” and NOT
Li
E long and
Ros
Per
2. What is the difference between instance method vs class method java? And give example
3. What is the difference between File object vs file name ?
Explanation / Answer
1)
Answer:
output:
e long and
explanation:
spock is "Live long and prosper"
affter calling stringtokenizer
trekkie contains four tokens= {"Li", "e long and ", "ros","er"}
String trash = trekkie.nextToken();
after the above statmente, the first token which Li is removed from trekkie and assigned to trash
now trekkie contains 3 tokens= {"e long and ", "ros","er"}
so here the first token is : "e long and "
so, that is printed
System.out.println(trekkie.nextToken());
because the first token is : "e long and "
after that
trekkie contains 2 tokens= {"ros","er"}
that's why
"e long and "
is printed
2)
instance method is method that is intitialized or brought to memory with in the object
means when the object is created for a class, then the methods in that object are called as instance method
class methods are the methods in the class declaration and definition which are not initialized
example:
class stack
{
int n;
void add(int m)//here add is class stacks method, which is not intialized
{
n=n+m;
}
}
//creating object for class stack
stack s = new stack();//object created
s.add(5);//now here it is instance method
3)
File object is object used to open a file
file name is used as agrument for the file object, inorder to open a file
//if you find this helpfull, pls give a thumbs up
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.