Create tutorial_25.java

simply-coded · web-flow · commit 92aba1dda94d · 2017-10-10T06:30:55.000-05:00
diff --git a/code/tutorial_25.java b/code/tutorial_25.java
@@ -0,0 +1,47 @@
+public class Driver {
+  static int classVarResult;
+
+  public static void main(String[] args) {
+    // Using a class varaible. All methods can change this.
+    add1(5, 3);
+    System.out.println(classVarResult);
+
+    // Returing a varaible from a method directly
+    int methodVarResult = add2(23, 4);
+    System.out.println(methodVarResult);
+
+    // Doing so means I can use it inline with other code.
+    System.out.println( "5 + 2 + 8 = " + (add2(5, 2) + 8) );
+
+    // Returning different types
+    System.out.println( divide(22, 4) );
+
+    // Making a method that tests a condition
+    if (isEven(5461 * 6)) {
+      System.out.println("result is even");
+    } else {
+      System.out.println("result is odd");
+    }
+  }
+
+  public static void add1(int n1, int n2) {
+    classVarResult = n1 + n2;
+  }
+
+  public static int add2(int n1, int n2) {
+    int result = n1 + n2;
+    return result;
+  }
+
+  public static double divide(double n1, double n2) {
+    return n1 / n2;
+  }
+
+  public static boolean isEven(int num) {
+    if (num % 2 == 0) {
+      // if this happens it will exit out of the method. return false will not happen
+      return true; 
+    }
+    return false;        
+  }
+}
