Merge pull request #4265 from MherBaghinyan/BAEL-1788

Bael 1788

core-java/src/main/java/com/baeldung/keyword/KeywordDemo.java

@@ -0,0 +1,16 @@
+package com.baeldung.keyword;
+
+import com.baeldung.keyword.superkeyword.SuperSub;
+import com.baeldung.keyword.thiskeyword.KeywordTest;
+
+/**
+ * Created by Gebruiker on 5/14/2018.
+ */
+public class KeywordDemo {
+
+    public static void main(String[] args) {
+        KeywordTest keyword = new KeywordTest();
+
+        SuperSub child = new SuperSub("message from the child class");
+    }
+}

core-java/src/main/java/com/baeldung/keyword/superkeyword/SuperBase.java

@@ -0,0 +1,20 @@
+package com.baeldung.keyword.superkeyword;
+
+/**
+ * Created by Gebruiker on 5/14/2018.
+ */
+public class SuperBase {
+
+    String message = "super class";
+
+    public SuperBase() {
+    }
+
+    public SuperBase(String message) {
+        this.message = message;
+    }
+
+    public void printMessage() {
+        System.out.println(message);
+    }
+}

core-java/src/main/java/com/baeldung/keyword/superkeyword/SuperSub.java

@@ -0,0 +1,26 @@
+package com.baeldung.keyword.superkeyword;
+
+/**
+ * Created by Gebruiker on 5/15/2018.
+ */
+public class SuperSub extends SuperBase {
+
+    String message = "child class";
+
+    public SuperSub(String message) {
+        super(message);
+    }
+
+    public SuperSub() {
+        super.printMessage();
+        printMessage();
+    }
+
+    public void getParentMessage() {
+        System.out.println(super.message);
+    }
+
+    public void printMessage() {
+        System.out.println(message);
+    }
+}

core-java/src/main/java/com/baeldung/keyword/thiskeyword/KeywordTest.java

@@ -0,0 +1,49 @@
+package com.baeldung.keyword.thiskeyword;
+
+public class KeywordTest {
+
+    private String name;
+    private int age;
+
+    public KeywordTest() {
+        this("John", 27);
+        this.printMessage();
+        printInstance(this);
+    }
+
+    public KeywordTest(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public void printMessage() {
+        System.out.println("invoked by this");
+    }
+
+    public void printInstance(KeywordTest thisKeyword) {
+        System.out.println(thisKeyword);
+    }
+
+    public KeywordTest getCurrentInstance() {
+        return this;
+    }
+
+    class ThisInnerClass {
+
+        boolean isInnerClass = true;
+
+        public ThisInnerClass() {
+            KeywordTest thisKeyword = KeywordTest.this;
+            String outerString = KeywordTest.this.name;
+            System.out.println(this.isInnerClass);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "KeywordTest{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
+}