Challenge 28.

JavaZakariae · JavaZakariae · commit 5bdad1539a92 · 2019-11-03T22:39:40.000+01:00
Polymorphism using Abstract Classes.
diff --git a/src/main/java/challenge01_10/Challenge_1.java b/src/main/java/challenge01_10/Challenge_1.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.util.Optional;
 
diff --git a/src/main/java/challenge01_10/Challenge_10.java b/src/main/java/challenge01_10/Challenge_10.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.util.List;
 
diff --git a/src/main/java/challenge01_10/Challenge_2.java b/src/main/java/challenge01_10/Challenge_2.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.util.function.Function;
 
diff --git a/src/main/java/challenge01_10/Challenge_3.java b/src/main/java/challenge01_10/Challenge_3.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.io.Closeable;
 import java.io.IOException;
diff --git a/src/main/java/challenge01_10/Challenge_4.java b/src/main/java/challenge01_10/Challenge_4.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.util.List;
 import java.util.Set;
diff --git a/src/main/java/challenge01_10/Challenge_5.java b/src/main/java/challenge01_10/Challenge_5.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.util.ArrayList;
 import java.util.Collection;
diff --git a/src/main/java/challenge01_10/Challenge_6.java b/src/main/java/challenge01_10/Challenge_6.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 /**
  *  Result: null
diff --git a/src/main/java/challenge01_10/Challenge_7.java b/src/main/java/challenge01_10/Challenge_7.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/main/java/challenge01_10/Challenge_8.java b/src/main/java/challenge01_10/Challenge_8.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.util.function.Function;
 import java.util.regex.Pattern;
diff --git a/src/main/java/challenge01_10/Challenge_9.java b/src/main/java/challenge01_10/Challenge_9.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge01_10;
 
 import java.io.Closeable;
 import java.io.IOException;
diff --git a/src/main/java/challenge11_20/Challenge_11.java b/src/main/java/challenge11_20/Challenge_11.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.lang.annotation.Annotation;
 import java.lang.annotation.Retention;
diff --git a/src/main/java/challenge11_20/Challenge_12.java b/src/main/java/challenge11_20/Challenge_12.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.util.function.BiConsumer;
 import java.util.function.BiFunction;
diff --git a/src/main/java/challenge11_20/Challenge_13.java b/src/main/java/challenge11_20/Challenge_13.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.util.ArrayList;
 
diff --git a/src/main/java/challenge11_20/Challenge_14.java b/src/main/java/challenge11_20/Challenge_14.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 /**
  *
diff --git a/src/main/java/challenge11_20/Challenge_15.java b/src/main/java/challenge11_20/Challenge_15.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.util.List;
 import java.util.OptionalInt;
diff --git a/src/main/java/challenge11_20/Challenge_16.java b/src/main/java/challenge11_20/Challenge_16.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/main/java/challenge11_20/Challenge_17.java b/src/main/java/challenge11_20/Challenge_17.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.util.stream.IntStream;
 
diff --git a/src/main/java/challenge11_20/Challenge_18.java b/src/main/java/challenge11_20/Challenge_18.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 /**
  *  bitwise operation
diff --git a/src/main/java/challenge11_20/Challenge_19.java b/src/main/java/challenge11_20/Challenge_19.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.util.Set;
 
diff --git a/src/main/java/challenge11_20/Challenge_20.java b/src/main/java/challenge11_20/Challenge_20.java
@@ -1,4 +1,4 @@
-package challenge01_20;
+package challenge11_20;
 
 import java.util.List;
 
diff --git a/src/main/java/challenge21_30/Challenge_21.java b/src/main/java/challenge21_30/Challenge_21.java
@@ -1,4 +1,4 @@
-package challenge21_40;
+package challenge21_30;
 
 import java.time.LocalDate;
 import java.time.Month;
diff --git a/src/main/java/challenge21_30/Challenge_22.java b/src/main/java/challenge21_30/Challenge_22.java
@@ -1,4 +1,4 @@
-package challenge21_40;
+package challenge21_30;
 
 /**
  * overloaded method priority
diff --git a/src/main/java/challenge21_30/Challenge_23.java b/src/main/java/challenge21_30/Challenge_23.java
@@ -1,4 +1,4 @@
-package challenge21_40;
+package challenge21_30;
 
 /**
  * From oracle doc
diff --git a/src/main/java/challenge21_30/Challenge_24.java b/src/main/java/challenge21_30/Challenge_24.java
@@ -1,4 +1,4 @@
-package challenge21_40;
+package challenge21_30;
 
 import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.Method;
diff --git a/src/main/java/challenge21_30/Challenge_27.java b/src/main/java/challenge21_30/Challenge_27.java
@@ -1,4 +1,4 @@
-package challenge21_40;
+package challenge21_30;
 
 import java.util.HashSet;
 import java.util.Set;
diff --git a/src/main/java/challenge21_30/Challenge_28.java b/src/main/java/challenge21_30/Challenge_28.java
@@ -0,0 +1,54 @@
+package challenge21_30;
+
+/**
+ * default access modifier
+ *              we access it from the same class and the same package.
+ * protected access modifier
+ *              we access it from the same class,
+ *              the same package and from the subclasses even in another package.
+ *
+ * abstract class only for implementation purpose, so no way to instatiate the abstract class.
+ *
+ *
+ */
+public class Challenge_28 {
+    static abstract class Simpson{
+        void talk(){
+            System.out.println("Simpson");
+        }
+        protected void prank(String prank){
+            System.out.println(prank);
+        }
+    }
+
+    static class Bart extends Simpson{
+        String prank;
+        public Bart( String prank ) {
+            this.prank = prank;
+        }
+
+        protected void talk(){
+            System.out.println("Eat my shorts!");
+        }
+
+        void prank(){
+            super.prank(prank);
+            System.out.println("Knock Homer down");
+        }
+    }
+
+    static class Lisa extends Simpson{
+        void talk(String toMe){
+            System.out.println("I love Sex");
+        }
+    }
+
+    public static void main( String[] args ) {
+        new Lisa().talk("sex");
+        Simpson simpson = new Bart("D'oh");
+        simpson.talk();
+        Lisa lisa = new Lisa();
+        lisa.talk();
+        ((Bart) simpson).prank();
+    }
+}
diff --git a/src/main/java/challenge21_30/Challenge_30.java b/src/main/java/challenge21_30/Challenge_30.java
@@ -1,4 +1,4 @@
-package challenge21_40;
+package challenge21_30;
 
 /**
  *
diff --git a/src/main/java/challenge21_30/challenge_25.java b/src/main/java/challenge21_30/challenge_25.java
@@ -1,4 +1,4 @@
-package challenge21_40;
+package challenge21_30;
 
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
diff --git a/src/main/java/util/MyBean.java b/src/main/java/util/MyBean.java
@@ -1,4 +1,4 @@
-package mytest;
+package util;
 
 
 import java.lang.reflect.InvocationHandler;

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-package challenge01_20;`
	`1`	`+package challenge01_10;`
`2`	`2`
`3`	`3`	`import java.util.Optional;`
`4`	`4`