Refactoring for Method Reference

Author: spdpiyush

Modern-Java-Examples/src/com/learn/data/StudentDataBase.java

@@ -3,9 +3,16 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.function.Supplier;
 
 public class StudentDataBase {
 
+
+    /**
+     * Utility Method to return 1 Student.
+     */
+    public static Supplier<Student> studentSupplier = () -> new Student("Adam", 2, "male", 4.5, Arrays.asList("swimming", "basketball"));
+
     /**
      * Dummy Student Data
      * @return

Modern-Java-Examples/src/com/learn/methodreference/RefactorMethodReferenceExample.java

@@ -0,0 +1,24 @@
+package com.learn.methodreference;
+
+import com.learn.data.Student;
+import com.learn.data.StudentDataBase;
+
+import java.util.function.Predicate;
+
+public class RefactorMethodReferenceExample {
+
+    static Predicate<Student> studentPredicate = (student) -> student.getGradeLevel() >= 3;
+
+    static Predicate<Student> predicateWithMethodReference = RefactorMethodReferenceExample::gradeLevelGreaterThanThree;
+
+    public static void main(String[] args) {
+
+        System.out.println(studentPredicate.test(StudentDataBase.studentSupplier.get()));
+
+        System.out.println(predicateWithMethodReference.test(StudentDataBase.studentSupplier.get()));
+    }
+
+    public static boolean gradeLevelGreaterThanThree(Student student) {
+        return student.getGradeLevel() >= 3;
+    }
+}

README.md

@@ -17,6 +17,8 @@ This repository contains the basic & advance level examples related to Java
     * [BinaryOperator](Modern-Java-Examples/src/com/learn/functionalInterfaces/BinaryOperatorExample.java)
     * [Supplier](Modern-Java-Examples/src/com/learn/functionalInterfaces/SupplierExample.java)
   * [Method Reference](Modern-Java-Examples/src/com/learn/methodreference/FunctionMethodReferenceExample.java)
+    * [Consumer Method Reference](Modern-Java-Examples/src/com/learn/methodreference/ConsumerMethodReferenceExample.java)
+    * [Refactoring Method Reference](Modern-Java-Examples/src/com/learn/methodreference/RefactorMethodReferenceExample.java)