Using text blocks instead of String literals

combinator/src/main/java/com/iluwatar/combinator/CombinatorApp.java

@@ -44,6 +44,20 @@
 @Slf4j
 public class CombinatorApp {
 
+  private static final String TEXT = """
+            It was many and many a year ago,
+            In a kingdom by the sea,
+            That a maiden there lived whom you may know
+            By the name of ANNABEL LEE;
+            And this maiden she lived with no other thought
+            Than to love and be loved by me.
+            I was a child and she was a child,
+            In this kingdom by the sea;
+            But we loved with a love that was more than love-
+            I and my Annabel Lee;
+            With a love that the winged seraphs of heaven
+            Coveted her and me.""";
+
   /**
    * main.
    * @param args args
@@ -69,19 +83,8 @@ public static void main(String[] args) {
   }
 
   private static String text() {
-    return
-        "It was many and many a year ago,\n"
-            + "In a kingdom by the sea,\n"
-            + "That a maiden there lived whom you may know\n"
-            + "By the name of ANNABEL LEE;\n"
-            + "And this maiden she lived with no other thought\n"
-            + "Than to love and be loved by me.\n"
-            + "I was a child and she was a child,\n"
-            + "In this kingdom by the sea;\n"
-            + "But we loved with a love that was more than love-\n"
-            + "I and my Annabel Lee;\n"
-            + "With a love that the winged seraphs of heaven\n"
-            + "Coveted her and me.";
+
+    return TEXT;
   }
 
 }

combinator/src/test/java/com/iluwatar/combinator/FinderTest.java

@@ -32,7 +32,10 @@ class FinderTest {
 
   @Test
   void contains() {
-    var example = "the first one \nthe second one \n";
+    var example = """
+                the first one 
+                the second one\s
+                """;
 
     var result = Finder.contains("second").find(example);
     assertEquals(1, result.size());

combinator/src/test/java/com/iluwatar/combinator/FindersTest.java

@@ -67,18 +67,19 @@ void expandedFinderTest() {
 
   private String text() {
     return
-        "It was many and many a year ago,\n"
-            + "In a kingdom by the sea,\n"
-            + "That a maiden there lived whom you may know\n"
-            + "By the name of ANNABEL LEE;\n"
-            + "And this maiden she lived with no other thought\n"
-            + "Than to love and be loved by me.\n"
-            + "I was a child and she was a child,\n"
-            + "In this kingdom by the sea;\n"
-            + "But we loved with a love that was more than love-\n"
-            + "I and my Annabel Lee;\n"
-            + "With a love that the winged seraphs of heaven\n"
-            + "Coveted her and me.";
+            """
+                    It was many and many a year ago,
+                    In a kingdom by the sea,
+                    That a maiden there lived whom you may know
+                    By the name of ANNABEL LEE;
+                    And this maiden she lived with no other thought
+                    Than to love and be loved by me.
+                    I was a child and she was a child,
+                    In this kingdom by the sea;
+                    But we loved with a love that was more than love-
+                    I and my Annabel Lee;
+                    With a love that the winged seraphs of heaven
+                    Coveted her and me.""";
   }
 
 }

composite-view/src/main/java/com/iluwatar/compositeview/AppServlet.java

@@ -40,9 +40,14 @@
 public final class AppServlet extends HttpServlet {
   private static final String CONTENT_TYPE = "text/html";
   private String msgPartOne = "<h1>This Server Doesn't Support";
-  private String msgPartTwo = "Requests</h1>\n"
-      + "<h2>Use a GET request with boolean values for the following parameters<h2>\n"
-      + "<h3>'name'</h3>\n<h3>'bus'</h3>\n<h3>'sports'</h3>\n<h3>'sci'</h3>\n<h3>'world'</h3>";
+  private String msgPartTwo = """
+          Requests</h1>
+          <h2>Use a GET request with boolean values for the following parameters<h2>
+          <h3>'name'</h3>
+          <h3>'bus'</h3>
+          <h3>'sports'</h3>
+          <h3>'sci'</h3>
+          <h3>'world'</h3>""";
 
   private String destination = "newsDisplay.jsp";
 

composite-view/src/test/java/com/iluwatar/compositeview/AppServletTest.java

@@ -40,9 +40,14 @@
 
 class AppServletTest extends Mockito{
   private String msgPartOne = "<h1>This Server Doesn't Support";
-  private String msgPartTwo = "Requests</h1>\n"
-      + "<h2>Use a GET request with boolean values for the following parameters<h2>\n"
-      + "<h3>'name'</h3>\n<h3>'bus'</h3>\n<h3>'sports'</h3>\n<h3>'sci'</h3>\n<h3>'world'</h3>";
+  private String msgPartTwo = """
+          Requests</h1>
+          <h2>Use a GET request with boolean values for the following parameters<h2>
+          <h3>'name'</h3>
+          <h3>'bus'</h3>
+          <h3>'sports'</h3>
+          <h3>'sci'</h3>
+          <h3>'world'</h3>""";
   private String destination = "newsDisplay.jsp";
 
   @Test

embedded-value/src/main/java/com/iluwatar/embedded/value/App.java

@@ -24,7 +24,6 @@
  */
 package com.iluwatar.embedded.value;
 
-import java.util.stream.Collectors;
 import lombok.extern.slf4j.Slf4j;
 
 /** 
@@ -73,7 +72,7 @@ public static void main(String[] args) throws Exception {
     }
 
     // Initially, database is empty
-    LOGGER.info("Orders Query: {}", dataSource.queryOrders().collect(Collectors.toList()));
+    LOGGER.info("Orders Query: {}", dataSource.queryOrders().toList());
 
     //Insert orders where shippingAddress is mapped to different columns of the same table 
     dataSource.insertOrder(order1);
@@ -83,7 +82,7 @@ public static void main(String[] args) throws Exception {
 
     // Query orders.
     // We'll create ShippingAddress object from city, state, pincode values from the table and add it to Order object
-    LOGGER.info("Orders Query: {}", dataSource.queryOrders().collect(Collectors.toList()) + "\n");
+    LOGGER.info("Orders Query: {}", dataSource.queryOrders().toList() + "\n");
 
     //Query order by given id
     LOGGER.info("Query Order with id=2: {}", dataSource.queryOrder(2));
@@ -93,7 +92,7 @@ public static void main(String[] args) throws Exception {
     //Since we'd mapped address in the same table, deleting order will also take out the shipping address details.
     LOGGER.info("Remove Order with id=1");
     dataSource.removeOrder(1);
-    LOGGER.info("\nOrders Query: {}", dataSource.queryOrders().collect(Collectors.toList()) + "\n");
+    LOGGER.info("\nOrders Query: {}", dataSource.queryOrders().toList() + "\n");
 
     //After successful demonstration of the pattern, drop the table
     if (dataSource.deleteSchema()) {

embedded-value/src/main/java/com/iluwatar/embedded/value/DataSource.java

@@ -87,7 +87,7 @@ public String getSchema() {
       var resultSet = getschema.executeQuery(GET_SCHEMA);
       var sb = new StringBuilder();
       while (resultSet.next()) {
-        sb.append("Col name: " + resultSet.getString(1) + ",  Col type: " + resultSet.getString(2) + "\n");
+        sb.append("Col name: ").append(resultSet.getString(1)).append(",  Col type: ").append(resultSet.getString(2)).append("\n");
       }
       getschema.close();
       return sb.toString();

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/App.java

@@ -150,7 +150,12 @@ public void runInteractiveMode() {
     var option = -1;
     while (option != 4) {
       LOGGER.info("Hello. Would you like to boil some eggs?");
-      LOGGER.info("(1) BOIL AN EGG \n(2) STOP BOILING THIS EGG \n(3) HOW ARE MY EGGS? \n(4) EXIT");
+      LOGGER.info("""
+              (1) BOIL AN EGG
+              (2) STOP BOILING THIS EGG
+              (3) HOW ARE MY EGGS?
+              (4) EXIT
+              """);
       LOGGER.info("Choose [1,2,3,4]: ");
       option = s.nextInt();
 

metadata-mapping/src/main/java/com/iluwatar/metamapping/utils/DatabaseUtil.java

@@ -34,13 +34,13 @@
 @Slf4j
 public class DatabaseUtil {
   private static final String DB_URL = "jdbc:h2:mem:metamapping";
-  private static final String CREATE_SCHEMA_SQL = "DROP TABLE IF EXISTS `user_account`;"
-      + "CREATE TABLE `user_account` (\n"
-      + "  `id` int(11) NOT NULL AUTO_INCREMENT,\n"
-      + "  `username` varchar(255) NOT NULL,\n"
-      + "  `password` varchar(255) NOT NULL,\n"
-      + "  PRIMARY KEY (`id`)\n"
-      + ");";
+  private static final String CREATE_SCHEMA_SQL = """
+          DROP TABLE IF EXISTS `user_account`;CREATE TABLE `user_account` (
+            `id` int(11) NOT NULL AUTO_INCREMENT,
+            `username` varchar(255) NOT NULL,
+            `password` varchar(255) NOT NULL,
+            PRIMARY KEY (`id`)
+          );""";
 
   /**
    * Hide constructor.

property/src/test/java/com/iluwatar/property/CharacterTest.java

@@ -79,15 +79,33 @@ void testToString() {
     prototype.set(Stats.ARMOR, 1);
     prototype.set(Stats.AGILITY, 2);
     prototype.set(Stats.INTELLECT, 3);
-    assertEquals("Stats:\n - AGILITY:2\n - ARMOR:1\n - INTELLECT:3\n", prototype.toString());
+    var message = """
+            Stats:
+             - AGILITY:2
+             - ARMOR:1
+             - INTELLECT:3
+            """;
+    assertEquals(message, prototype.toString());
 
     final var stupid = new Character(Type.ROGUE, prototype);
     stupid.remove(Stats.INTELLECT);
-    assertEquals("Character type: ROGUE\nStats:\n - AGILITY:2\n - ARMOR:1\n", stupid.toString());
+    String expectedStupidString = """
+            Character type: ROGUE
+            Stats:
+             - AGILITY:2
+             - ARMOR:1
+            """;
+    assertEquals(expectedStupidString, stupid.toString());
 
     final var weak = new Character("weak", prototype);
     weak.remove(Stats.ARMOR);
-    assertEquals("Player: weak\nStats:\n - AGILITY:2\n - INTELLECT:3\n", weak.toString());
+    String expectedWeakString = """
+            Player: weak
+            Stats:
+             - AGILITY:2
+             - INTELLECT:3
+            """;
+    assertEquals(expectedWeakString, weak.toString());
 
   }