Question

Can someone help me with this java problem?

Answer 1

I have my program MyString.
public class MyString {

public static String reverse(String s) {
String reverse = "";
for(int i=s.length() - 1; i >=0; i--) {
reverse = reverse + s.charAt(i);
}
return reverse;
}

public static boolean isPalindrome(String s) {
String a = reverse(s);
if(a.equals(s)) {
return true;
}
return false;
}

public static boolean match(String s1, String s2) {
return s1.equals(s2);
}
public static int mismatchCount(String s1, String s2) {
int counter = 0;
for(int i=0; i < s1.length(); i++) {
if(s1.charAt(i)!=s2.charAt(i)) {
counter++;
}
}
return counter;
}
public static boolean similar(String s1, String s2) {
int mismatch = mismatchCount(s1,s2);
return mismatch<=1;
}
public static void printPositions(String key, String target) {

for(int j = 0; j <= target.length() - key.length(); j++) {
if(target.substring(j,j+key.length()).equals(key)) {
System.out.println(j);
}
}
}
}

Answer 2

Does this JUnit Test look okay?
import junit.framework.TestCase;

public class TestMyString extends TestCase {
public void testReverse() {
assertEquals(MyString.reverse("cat"),"tac");
}
public void testisPalindrome() {
assertEquals("isPalindrome","eye","eye"); //returns true if eye is the same when reversed
assertEquals("isPalindrome","horse","horse"); //returns false when they aren't the same
}
public void testMatch() {
assertEquals("match","dog","dog");
}
public void testMismatchCount() {
assertEquals("mismatchcount","bow","bow");
}
public void testSimilar() {
assertEquals("similar","boo","boo");
}
}

Answer 3

@cwrw238 @ganeshie8 @TuringTest

Answer 4

@dpaInc @Hero

Answer 5

@KonradZuse @eSpex

Answer 6

seems to run and work ok - just add the usual public static void main(String[] args){
} - you can run all your tests within it.

Answer 7

i just have to test those five methods in the "Test Output" window, so i don't need to run it!

Answer 8

I've never used JUnit.....

Answer 9

Not sure what exactly it does, maybe I have, I know it's included in my IDE Netbeans....

Answer 10

I came up with the same answer as Snark

Answer 11

snarks right