The challenge
We need a function that can transform a number into a string.
What ways of achieving this do you know?
Examples:
Solution.numberToString(123); // returns "123";
Solution.numberToString(999); // returns "999";
The solution in Java code
The easiest way to do this is to use the String.valueOf method to take an integer and return a string:
class Solution {
public static String numberToString(int num) {
return String.valueOf(num);
}
}
This can also be done the other way around, using the Integer.toString method:
class Solution {
public static String numberToString(int num) {
return Integer.toString(num);
}
}
Test cases to validate our Java code
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class NumberStringExampleTests {
@Test
public void tests() {
assertEquals("67", Solution.numberToString(67));
assertEquals("123", Solution.numberToString(123));
assertEquals("999", Solution.numberToString(999));
}
}
