sayed-moin-ahmed · sayed-moin-ahmed · Mar 6, 2021 · Mar 6, 2021 · Mar 6, 2021 · Mar 6, 2021
diff --git a/.gitignore b/.gitignore
@@ -26,3 +26,4 @@ hs_err_pid*
 *.xml
 *.lst
 .idea/*.*
+example.iml
diff --git a/src/main/java/com/java15/example/ExampleApplication.java b/src/main/java/com/java15/example/ExampleApplication.java
@@ -13,92 +13,9 @@
 public class ExampleApplication {
 
 	public static void main(String[] args) {
-		int result = 0;
-		Set<String> opNames = new HashSet();
-		opNames.add("ADD");
-		opNames.add("SUB");
+
 
-		if(Objects.isNull(args) || 3 != args.length)
-			throw new IllegalArgumentException("Please enter the value like OperationName(ADD/SUB) value1 value2 : example ADD/SUB 3 4");
-		String operation = args[0].trim();
-		if(!opNames.contains(operation))
-			throw new IllegalArgumentException("Invalid operation put either ADD/SUB");
-		Integer value1 = Integer.valueOf(args[1]);
-		Integer value2 = Integer.valueOf(args[2]);
-		if("ADD".equals(operation)){
-			result = value1 + value2;
-		}
-		else if("SUB".equals(operation)){
-			result = value1 - value2;
-		}
-		System.out.println(result);
-
-	}
-
-	private static void extracted() {
-		Employee employee1 = new Employee(1,"sam");
-		Employee employee2 = new Employee(2,"rock");
-		List<Employee> list = new ArrayList<Employee>();
-		list.add(employee1);
-		list.add(employee1);
-		System.out.println("list"+list);
-		Set<Employee> set = new HashSet<Employee>();
-		set.add(employee1);
-		set.add(employee2);
-		System.out.println("set"+set);
-		Map<Employee,Integer> map = new HashMap<>();
-		map.put(employee1,1);
-		map.put(employee2,2);
-		System.out.println("map"+map);
-		Stream stream = list.parallelStream().map(Employee::getId).peek(e->System.out.println("eager"+e));
-		System.out.println("Lazy");
-		stream.forEach(System.out::println);
-	}
-
-}
-class Employee {
-	private int id;
-	private String name;
-
-	public Employee(int id, String name) {
-		this.id = id;
-		this.name = name;
 	}
 
-	@Override
-	public boolean equals(Object o) {
-		if (this == o) return true;
-		if (o == null || getClass() != o.getClass()) return false;
-		Employee employee = (Employee) o;
-		return id == employee.id && Objects.equals(name, employee.name);
-	}
-
-	@Override
-	public int hashCode() {
-		return 1;
-	}
 
-	@Override
-	public String toString() {
-		return "Employee{" +
-				"id=" + id +
-				", name='" + name + '\'' +
-				'}';
-	}
-
-	public int getId() {
-		return id;
-	}
-
-	public void setId(int id) {
-		this.id = id;
-	}
-
-	public String getName() {
-		return name;
-	}
-
-	public void setName(String name) {
-		this.name = name;
-	}
 }
diff --git a/src/main/java/com/java15/example/java8inaction/Java8_9_10_11_whatshappening/Apple.java b/src/main/java/com/java15/example/java8inaction/Java8_9_10_11_whatshappening/Apple.java
@@ -0,0 +1,39 @@
+package com.java15.example.java8inaction.Java8_9_10_11_whatshappening;
+
+public class Apple {
+
+    private int weight;
+    private String color;
+
+    public Apple(int weight){
+        this.weight = weight;
+    }
+
+    public Apple(int weight,String color) {
+        this.weight = weight;this.color = color;
+    }
+
+    public int getWeight() {
+        return weight;
+    }
+
+    public void setWeight(int weight) {
+        this.weight = weight;
+    }
+
+    public String getColor() {
+        return color;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+    @Override
+    public String toString() {
+        return "Apple{" +
+                "weight=" + weight +
+                ", color='" + color + '\'' +
+                '}';
+    }
+}
diff --git a/src/main/java/com/java15/example/java8inaction/Java8_9_10_11_whatshappening/Colors.java b/src/main/java/com/java15/example/java8inaction/Java8_9_10_11_whatshappening/Colors.java
@@ -0,0 +1,6 @@
+package com.java15.example.java8inaction.Java8_9_10_11_whatshappening;
+
+public interface Colors {
+    String GREEN ="GREEN";
+    String RED ="RED";
+}
diff --git a/src/main/java/com/java15/example/java8inaction/Java8_9_10_11_whatshappening/Test.java b/src/main/java/com/java15/example/java8inaction/Java8_9_10_11_whatshappening/Test.java
@@ -0,0 +1,57 @@
+package com.java15.example.java8inaction.Java8_9_10_11_whatshappening;
+
+import java.io.File;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+import static java.util.stream.Collectors.groupingBy;
+
+public class Test {
+
+    public static void main(String[] args) {
+        List<Apple>  apples = getData();
+        //filterApples(apples,(Apple a) -> Colors.GREEN.equals(a.getColor())).stream().forEach(System.out::println);
+        //filterApples(apples,(Apple a) -> Colors.GREEN.equals(a.getColor())).stream().forEach(System.out::println);
+        //filterGroupApples(apples,(Apple a) -> Colors.RED.equals(a.getColor())).forEach((i,list) ->{System.out.println(i+""+list);});
+        //filterGroupApples(apples,(Apple a) -> {return true;}).forEach((i,list) ->{System.out.println(i+""+list);});
+        minAppleByWeight(apples).ifPresent(System.out::println);
+        maxAppleByWeight(apples).ifPresent(System.out::println);
+    }
+
+    static List<Apple> filterApples(List<Apple> inventory, Predicate<Apple> p) {
+        return inventory.stream().filter(p).collect(Collectors.toList());
+    }
+
+    static Map<Integer, List<Apple>> filterGroupApples(List<Apple> inventory, Predicate<Apple> p) {
+        return inventory.stream().filter(p).collect(groupingBy(Apple::getWeight));
+    }
+
+    static Optional<Apple> minAppleByWeight(List<Apple> inventory) {
+        return inventory.stream().min(Comparator.comparing(Apple::getWeight));
+    }
+
+    static Optional<Apple> maxAppleByWeight(List<Apple> inventory) {
+        return inventory.stream().max(Comparator.comparing(Apple::getWeight));
+    }
+
+    private static List<Apple> getData() {
+        Apple apple1 = new Apple(10,Colors.GREEN);
+        Apple apple2 = new Apple(1,Colors.RED);
+        Apple apple3 = new Apple(5,Colors.GREEN);
+        Apple apple4 = new Apple(3,Colors.RED);
+        Apple apple5 = new Apple(3,Colors.RED);
+        Apple apple6 = new Apple(5,Colors.GREEN);
+        List<Apple> apples =  List.of(apple1,apple2,apple3,apple4,apple5,apple6);
+        return apples;
+    }
+
+    static File[] handlingFiles(){
+        File[] hiddenFiles = new File(".").listFiles(File::isHidden);
+        return hiddenFiles;
+    }
+
+}
diff --git a/src/main/java/com/java15/example/java8inaction/Test.java b/src/main/java/com/java15/example/java8inaction/Test.java
@@ -0,0 +1,27 @@
+package com.java15.example.java8inaction;
+
+public class Test {
+
+    public static void main(String[] args){
+
+        int counter = 0;
+        int temp;
+        //9,3,6,5,7,2
+        int[] arr ={10,9,3,6,5,7,2,13};
+        for(int i= 0; i<arr.length;i++){
+            for(int j=1;j<arr.length;j++){
+                if(arr[i]<arr[j]){
+                    counter++;
+                    if(counter>2) {
+                        break;
+                    }
+                }
+            }
+
+        }
+        System.out.println(counter);
+
+
+    }
+
+}
-Original file line number
+Diff line change
@@ Expand Up / @@ -26,3 +26,4 @@ hs_err_pid* @@
     *.xml
     *.lst
     .idea/*.*
+    example.iml