added isBlank method, along with junit test and readme update

.classpath

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="src" path="src/test/java"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.gitignore

@@ -71,3 +71,4 @@ hs_err_pid*
 
 !gradle/wrapper/gradle-wrapper.jar
 
+/bin/

.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>strman</name>
+	<comment>Project strman created by Buildship.</comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.buildship.core.gradleprojectbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.buildship.core.prefs

@@ -0,0 +1,3 @@
+connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)
+connection.project.dir=
+eclipse.preferences.version=1

README.md

@@ -618,6 +618,19 @@ join(new String[]{"hello","world","123"}, ";")
 // result => "hello;world;123")
 ```
 
+## isBlank
+
+isEmpty returns true if a string is blank or null and false otherwise.
+
+```java
+isBlank("")
+// result => true)
+isBlank(null)
+// result => true)
+isBlank("test")
+// result => false)
+```
+
 ## Inspiration
 
 This library is inspired by [dleitee/strman](https://github.com/dleitee/strman).

src/main/java/strman/Strman.java

@@ -38,6 +38,9 @@ import static java.util.function.Function.identity;
 import static java.util.stream.Collectors.counting;
 import static java.util.stream.Collectors.groupingBy;
 import static java.util.stream.Collectors.joining;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static strman.Strman.isBlank;
 
 /**
  * A String manipulation library without any dependencies
@@ -1305,6 +1308,16 @@ public abstract class Strman {
                 .mapToObj(c -> (char) c)
                 .collect(groupingBy(identity(), counting()));
     }
+    
+    /**
+     * Checks if string is empty.  This is a null safe check and will return true when string is null.
+     *
+     * @param input The input string
+     * @return true if string is null or empty
+     */
+	public static boolean isBlank(String input) {
+		return input == null || input.isEmpty();
+	}
 
     private static void validate(String value, Predicate<String> predicate, final Supplier<String> supplier) {
         if (predicate.test(value)) {
@@ -1325,5 +1338,6 @@ public abstract class Strman {
         }
         return countSubstr(value.substring(offset), subStr, allowOverlapping, ++count);
     }
+    
 }
 

src/test/java/strman/StrmanTest.java

@@ -37,8 +37,6 @@ import static org.hamcrest.collection.IsArrayContainingInOrder.arrayContaining;
 import static org.hamcrest.collection.IsArrayWithSize.emptyArray;
 import static org.junit.Assert.*;
 import static strman.Strman.*;
-import static strman.Strman.endsWith;
-import static strman.Strman.format;
 
 public class StrmanTest {
 
@@ -1027,4 +1025,11 @@ public class StrmanTest {
 
         assertThat(charsCount("-----abbcccCCCBBA-----"), equalTo(expectedOutput));
     }
+    
+    @Test
+    public void testIsBlank() {
+    	assertTrue(isBlank(""));
+    	assertTrue(isBlank(null));
+    	assertFalse(isBlank("ac"));
+    }
 }