Added java stream examples

Java/Java-stream-filter/Example3.java

@@ -0,0 +1,50 @@
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+
+class Student {
+    private String name;
+    private int marks;
+
+    Student(String _name, int _marks){
+        this.name = _name;
+        this.marks = _marks;
+    }
+
+    String getName() {
+        return name;
+    }
+
+    int getMarks() {
+        return marks;
+    }
+
+    static void printStudents(List<Student> studentList){
+        studentList.forEach( e -> System.out.println("Student name : "+e.getName()+" Marks : "+e.getMarks()));
+    }
+}
+
+
+public class Example3 {
+
+    public static void main(String[] args) {
+        Student[] studentArray = {new Student("Jacob", 80), new Student("Amanda", 70),
+                new Student("Ashley", 85), new Student("Alexis", 90)};
+        List<Student> studentList = Arrays.asList(studentArray);
+
+        Predicate<Student> studentFilterPredicate = new Predicate<Student>() {
+            @Override
+            public boolean test(Student student) {
+                return student.getName().startsWith("A") && student.getMarks() > 80;
+            }
+        };
+
+        List<Student> studentAList = studentList.stream()
+                .filter(studentFilterPredicate)
+                .collect(Collectors.toList());
+
+        Student.printStudents(studentAList);
+    }
+}