Convert Collection to Array
In this section, you will learn to convert Collection
data to an Array.
Code Description:
This program helps you in converting Collection data to an
Array. Here we have taken an collection of weekdays which gets converted to
Array using days.toArray method.
import java.util.*;
import java.io.*;
import java.util.ArrayList;
import java.util.Collection;
public class CollToArr {
public static void main(String args[]) {
String weekdays[] = { "Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday","Friday", "Saturday"};
Collection<String> days = new ArrayList<String>();
for (int i = 0, n = weekdays.length; i < n; i++) {
days.add(weekdays[i]);
}
String s[] = (String[])days.toArray(new String[0]);
for (int i = 0, n = s.length; i < n; i++) {
System.out.println(s[i]);
}
}
}
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Output of the program:
C:\unique>javac CollToArr.java
C:\unique>java CollToArr
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
C:\unique> |
Download this example.
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