Add Guava example

core-java-8/src/test/java/com/baeldung/StringToIntTest.java

@@ -1,5 +1,6 @@
 package com.baeldung;
 
+import com.google.common.primitives.Ints;
 import org.junit.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -43,6 +44,15 @@ public class StringToIntTest {
         assertThat(result).isEqualTo(42);
     }
 
+    @Test
+    public void givenString_shouldConvertToInt5() throws Exception {
+        String givenString = "42";
+
+        Integer result = Ints.tryParse(givenString);
+
+        assertThat(result).isEqualTo(42);
+    }
+
     @Test(expected = NumberFormatException.class)
     public void givenInvalidInput_shouldThrow() throws Exception {
         String givenString = "nan";