pojo and record

Author: MichalPlucinski1

.idea/uiDesigner.xml

@@ -0,0 +1,43 @@
+package ControlFlow;
+
+public class Switch {
+
+
+    public static void main(String[] args) {
+        //classic
+
+        int a = 2;
+            //works with byte, short, int, char, String, enum and their main classess
+        switch(a){
+            case 1:
+                System.out.println("1");
+                break;
+            case 2:
+                System.out.println("2");
+                break;
+            case 3: case 4: case 5:
+                System.out.println("3 or 4 or 5");
+            default:
+                System.out.println("different");
+        }
+
+        //modern java switch
+
+        switch (a){
+            case 1 -> System.out.println("1");
+            case 2 -> System.out.println("2");
+            case 3, 4, 5 -> System.out.println("3, 4, 5");
+            default -> System.out.println("different");
+        }
+    }
+
+    public static String funWithReturn(String month){
+        return switch (month){
+            case "JANUARY", "Februaru", "March" ->  "1st";
+            case "April" -> "2nd";
+            default -> {
+                yield month + " is bad"; //must be in a code block
+            }
+        };
+    }
+}

src/ControlFlow/Switch.java

@@ -1,4 +1,4 @@
-package DataTypes.Transitions;
+package DataTypes.Casting;
 
 public class ParsingValues {
     public static void main(String[] args) {

src/DataTypes/Transitions/ParsingValues.java src/DataTypes/Casting/ParsingValues.java

@@ -0,0 +1,6 @@
+package OOP.POJOandRecord;
+
+public record LPAStudent(String id, String name, String classList) {
+    //fields are final, can't be modified
+
+}

src/OOP/POJOandRecord/LPAStudent.java

@@ -0,0 +1,30 @@
+package OOP.POJOandRecord;
+
+public class POJO {
+    //plain old java objects
+
+    //used to house data and pass between functional classes.
+
+    //mostly getters and setters
+
+    //usage with databases, files or streams
+
+    //may be called JavaBean/Bean
+
+    //also entity
+
+    //data transfer object
+
+
+    public class Student{
+        private String id;
+        private String name;
+        private String classList;
+    }
+
+    public static void main(String[] args) {
+        LPAStudent recordStudent = new LPAStudent("111333", "Michael", "Java");
+        System.out.println(recordStudent);
+        System.out.println(recordStudent.name() + " is taking " + recordStudent.classList());
+    }
+}