The challenge
Simple, remove the spaces from the string, then return the resultant string.
The solution in Java code
class Solution {
static String noSpace(final String x) {
return x.replace(" ", "");
}
}
An alternative:
class Solution {
static String noSpace(final String x) {
return x.replaceAll("\\s+","");
}
}
Test cases to validate our Java solution
import org.junit.Test;
import java.util.Random;
import static org.junit.Assert.assertEquals;
public class SolutionTest {
@Test public void testSomething() {
assertEquals("8j8mBliB8gimjB8B8jlB", Solution.noSpace("8 j 8 mBliB8g imjB8B8 jl B"));
assertEquals("88Bifk8hB8BB8BBBB888chl8BhBfd", Solution.noSpace("8 8 Bi fk8h B 8 BB8B B B B888 c hl8 BhB fd"));
assertEquals("8aaaaaddddr", Solution.noSpace("8aaaaa dddd r "));
assertEquals("jfBmgklf8hg88lbe8", Solution.noSpace("jfBm gk lf8hg 88lbe8 "));
assertEquals("8jaam", Solution.noSpace("8j aam"));
}
private static final String chars = "abc defg hij klm no pq rstuvw xyz";
@Test public void randomTests() {
Random random = new Random();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < 20; i++) {
int length = random.nextInt(15) + 1;
for (int j = 0; j < length; j++) {
int index = random.nextInt(chars.length());
sb.append(chars.charAt(index));
}
String input = sb.toString();
sb.setLength(0);
assertEquals(input.replaceAll(" ", ""), Solution.noSpace(input));
}
}
}
