Problem Statement
Java Iterator class can help you to iterate through every
elements in an collection. Here is a simple example:
import java.util.*;
public class Example
{
public static void main(String []argh)
{
ArrayList mylist = new ArrayList();
mylist.add("Hello");
mylist.add("Java");
mylist.add("4");
Iterator it=mylist.iterator();
while(it.hasNext())
{
Object element = it.next();
System.out.println((String)element);
}
}
}
In this problem you need
to complete a function func. The function takes an ArrayList as
input. In that ArrayList there
is one or more integer numbers, then there is a special string "###",
after that there are one or more other strings. A sample ArrayList may look like this:
element[0]=>42
element[1]=>10
element[2]=>"###"
element[3]=>"Hello"
element[4]=>"Java"
You have to modify the func function by editing at most 2 lines
so that the code only prints the elements after the special string
"###". For the sample above the output will be:
Hello
Java
To restore the original code in the editor, click the top left
icon on the editor and create a new buffer.
import java.util.*;
public class Main
{
static Iterator
func(ArrayList mylist)
{
Iterator
it=mylist.iterator();
while(it.hasNext())
{
Object
element = it.next();//~~Complete this~~
if(element
instanceof String)//Hints: use instanceof operator
break;
}
return it;
}
public static void
main(String []argh)
{
ArrayList mylist
= new ArrayList();
Scanner sc=new
Scanner(System.in);
int
n=sc.nextInt();
int
m=sc.nextInt();
for(int
i=0;i<n;i++)
{
mylist.add(sc.nextInt());
}
mylist.add("###");
for(int
i=0;i<m;i++)
{
mylist.add(sc.next());
}
Iterator
it=func(mylist);
while(it.hasNext())
{
Object
element = it.next();
System.out.println((String)element);
}
}
}
Congratulations, you
passed this test case!
Score: 1
Compile Time
Compile Message
Note: Main.java uses
unchecked or unsafe operations.
Note: Recompile with
-Xlint:unchecked for details.
Run Time
Input (stdin)
2 2
42
10
hello
java
Your Output (stdout)
hello
java
Expected Output
hello
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