Check String is not empty

Issue: BAEL-2128

java-strings/pom.xml

@@ -52,6 +52,11 @@
             <artifactId>icu4j</artifactId>
             <version>${icu4j.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
         
         <dependency>
             <groupId>com.vdurmont</groupId>
@@ -92,6 +97,7 @@
         <assertj.version>3.6.1</assertj.version>
         <jmh-core.version>1.19</jmh-core.version>
         <icu4j.version>61.1</icu4j.version>
+        <guava.version>26.0-jre</guava.version>
     </properties>
 
 </project>

java-strings/src/test/java/com/baeldung/string/StringEmptyUnitTest.java

@@ -0,0 +1,51 @@
+package com.baeldung.string;
+
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.text.IsEmptyString.isEmptyOrNullString;
+import static org.hamcrest.text.IsEmptyString.isEmptyString;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotSame;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+import org.apache.commons.lang3.StringUtils;
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+
+import com.google.common.base.Strings;
+
+public class StringEmptyUnitTest {
+
+    private String text = "baeldung";
+
+    @Test
+    public void givenAString_whenCheckedForEmptyUsingJunit_shouldAssertSuccessfully() {
+        assertTrue(!text.isEmpty());
+        assertFalse(text.isEmpty());
+        assertNotEquals("", text);
+        assertNotSame("", text);
+    }
+
+    @Test
+    public void givenAString_whenCheckedForEmptyUsingHamcrest_shouldAssertSuccessfully() {
+        assertThat(text, not(isEmptyString()));
+        assertThat(text, not(isEmptyOrNullString()));
+    }
+
+    @Test
+    public void givenAString_whenCheckedForEmptyUsingCommonsLang_shouldAssertSuccessfully() {
+        assertTrue(StringUtils.isNotBlank(text));
+    }
+
+    @Test
+    public void givenAString_whenCheckedForEmptyUsingAssertJ_shouldAssertSuccessfully() {
+        Assertions.assertThat(text).isNotEmpty();
+    }
+
+    @Test
+    public void givenAString_whenCheckedForEmptyUsingGuava_shouldAssertSuccessfully() {
+        assertFalse(Strings.isNullOrEmpty(text));
+    }
+
+}