BAEL-2432 (#5936)

Article's companion code.

core-java-lang/src/main/java/com/baeldung/controlstructures/ConditionalBranches.java

@@ -0,0 +1,68 @@
+package com.baeldung.controlstructures;
+
+public class ConditionalBranches {
+
+    /**
+     * Multiple if/else/else if statements examples. Shows different syntax usage.
+     */
+    public static void ifElseStatementsExamples() {
+        int count = 2; // Initial count value.
+
+        // Basic syntax. Only one statement follows. No brace usage.
+        if (count > 1)
+            System.out.println("Count is higher than 1");
+
+        // Basic syntax. More than one statement can be included. Braces are used (recommended syntax).
+        if (count > 1) {
+            System.out.println("Count is higher than 1");
+            System.out.println("Count is equal to: " + count);
+        }
+
+        // If/Else syntax. Two different courses of action can be included.
+        if (count > 2) {
+            System.out.println("Count is higher than 2");
+        } else {
+            System.out.println("Count is lower or equal than 2");
+        }
+
+        // If/Else/Else If syntax. Three or more courses of action can be included.
+        if (count > 2) {
+            System.out.println("Count is higher than 2");
+        } else if (count <= 0) {
+            System.out.println("Count is less or equal than zero");
+        } else {
+            System.out.println("Count is either equal to one, or two");
+        }
+    }
+
+    /**
+     * Ternary Operator example.
+     * @see ConditionalBranches#ifElseStatementsExamples()
+     */
+    public static void ternaryExample() {
+        int count = 2;
+        System.out.println(count > 2 ? "Count is higher than 2" : "Count is lower or equal than 2");
+    }
+
+    /**
+     * Switch structure example. Shows how to replace multiple if/else statements with one structure.
+     */
+    public static void switchExample() {
+        int count = 3;
+        switch (count) {
+        case 0:
+            System.out.println("Count is equal to 0");
+            break;
+        case 1:
+            System.out.println("Count is equal to 1");
+            break;
+        case 2:
+            System.out.println("Count is equal to 2");
+            break;
+        default:
+            System.out.println("Count is either negative, or higher than 2");
+            break;
+        }
+    }
+
+}

core-java-lang/src/main/java/com/baeldung/controlstructures/Loops.java

@@ -0,0 +1,73 @@
+package com.baeldung.controlstructures;
+
+public class Loops {
+
+    /**
+     * Dummy method. Only prints a generic message.
+     */
+    private static void methodToRepeat() {
+        System.out.println("Dummy method.");
+    }
+
+    /**
+     * Shows how to iterate 50 times with 3 different method/control structures.
+     */
+    public static void repetitionTo50Examples() {
+        for (int i = 1; i <= 50; i++) {
+            methodToRepeat();
+        }
+
+        int whileCounter = 1;
+        while (whileCounter <= 50) {
+            methodToRepeat();
+            whileCounter++;
+        }
+
+        int count = 1;
+        do {
+            methodToRepeat();
+            count++;
+        } while (count < 50);
+    }
+
+    /**
+     * Prints text an N amount of times. Shows usage of the {@code break} branching statement.
+     * @param textToPrint Text to repeatedly print.
+     * @param times Amount to times to print received text.
+     */
+    public static void printTextNTimes(String textToPrint, int times) {
+        int counter = 1;
+        while (true) {
+            System.out.println(textToPrint);
+            if (counter == times) {
+                break;
+            }
+        }
+    }
+
+    /**
+     * Prints an specified amount of even numbers. Shows usage of both {@code break} and {@code continue} branching statements.
+     * @param amountToPrint Amount of even numbers to print.
+     */
+    public static void printEvenNumbers(int amountToPrint) {
+        if (amountToPrint <= 0) { // Invalid input
+            return;
+        }
+        int iterator = 0;
+        int amountPrinted = 0;
+        while (true) {
+            if (iterator % 2 == 0) { // Is an even number
+                System.out.println(iterator);
+                amountPrinted++;
+                iterator++;
+            } else {
+                iterator++;
+                continue; // Won't print
+            }
+            if (amountPrinted == amountToPrint) {
+                break;
+            }
+        }
+    }
+
+}