playing with hashCode() and assertions in main() method

Yaro4Java · Yaro4Java · commit e380d88bc93e · 2019-12-26T00:21:47.000+03:00
diff --git a/src/main/java/com/epam/izh/rd/online/Main.java b/src/main/java/com/epam/izh/rd/online/Main.java
@@ -1,6 +1,8 @@
 package com.epam.izh.rd.online;
 
 import com.epam.izh.rd.online.entity.Author;
+import org.springframework.util.Assert;
+import org.springframework.util.SocketUtils;
 
 public class Main {
 
@@ -13,11 +15,44 @@ public static void main(String[] args) {
             author1.setName("Yaroslav");
             author1.setCountry("Russia");
 
+            class FreakAuthor extends Author {
+                public FreakAuthor(String name) {
+                    this.setName(name);
+                }
+
+                @Override
+                public int hashCode() {
+                    return Object.class.hashCode();
+                }
+
+            }
+
+            FreakAuthor freak = new FreakAuthor("John");
+
             System.out.println(author1.toString());
-            System.out.println("\nHash code is " + author1.hashCode());
+            System.out.println("\nHash code1 for author " + author1.getName() + " is " + author1.hashCode());
+            System.out.println("Hash code2 for author " + author1.getName() + " is " + author1.hashCode());
+            System.out.println("Hash code3 for author " + author1.getName() + " is " + author1.hashCode());
+
+            System.out.println("\nHash code1 for author " + freak.getName() + " is " + freak.hashCode());
+            System.out.println("Hash code2 for author " + freak.getName() + " is " + freak.hashCode());
+            System.out.println("Hash code3 for author " + freak.getName() + " is " + freak.hashCode());
 
         }/* END OF DEBUGGING CLASS Author */
 
+
+        {/* SECTION FOR PLAYING WITH ASSERTIONS */
+
+            try {
+                Assert.isTrue(1 == 2, "What? 1 == 2? That's not true!!!");
+            } /*catch ( IllegalArgumentException e ) {
+                System.out.println("What was that?!");
+            }*/ catch ( Exception e ) {
+                System.out.println("\nIt was just an exception. Don't worry, be happy.\n");
+            }
+
+        }/* END OF DEBUGGING ASSERTIONS */
+
     }
 
 }
