updated with two versions

demos/gaspump/.gradle/buildOutputCleanup/cache.properties

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+#Sat Nov 12 12:12:58 PST 2022
+gradle.version=4.9

demos/gaspump/README.md

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+# Gas Pump Solutions
+
+### Version 1 - Basic Solution
+
+### Version 2 - Added Car Wash
+

demos/gaspump/gaspump_v1/.gradle/buildOutputCleanup/cache.properties

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+#Sat Nov 12 12:12:58 PST 2022
+gradle.version=4.9

demos/gaspump/gaspump_v1/src/main/java/Screen.java

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+
+import java.util.* ;
+import java.util.Random ;
+
+public class Screen implements IScreen
+{
+    // ad message
+    private String[] ads = {
+        "Join our Rewards Program.", 
+        "Hungry? Visit our Snack Bar.", 
+        "Save with a Car Wash.",
+        "Star Wars Movie Preview.",
+        "New on HBO Now.",
+        "New iPhone 13 at AT&T.",
+        "Macy's Summer Clearance.",
+        "Get Your Smog Check Now."
+    };
+    private String ad = "" ;
+
+    // get random ad
+    private String getAd() {
+        Random rand = new Random() ;
+        int index = rand.nextInt(ads.length) ; 
+        return ads[index] ;
+    }
+
+    // states
+    private State S0 = new State0(this) ;
+    private State S1 = new State1(this) ;    
+    private State S2 = new State2(this) ;   
+    private State S3 = new State3(this) ;   
+    private State S4 = new State4(this) ;   
+    private State S5 = new State5(this) ;
+    private State S6 = new State6(this) ;   
+    private State S7 = new State7(this) ;   
+
+    private State current = S0 ;
+
+    public void setState( int new_state ) {
+        switch ( new_state ) {
+            case 0: current = S0 ; break ;
+            case 1: current = S1 ; break ;
+            case 2: current = S2 ; break ;
+            case 3: current = S3 ; break ;
+            case 4: current = S4 ; break ;
+            case 5: current = S5 ; break ;
+            case 6: current = S6 ; break ;
+            case 7: current = S7 ; break ;
+        }
+    }
+
+    // commands
+    private ICommand cmd_a = new ICommand() {
+                                public void execute() {
+                                    current.doA() ;
+                                }
+                        } ;
+    private ICommand cmd_b = new ICommand() {
+                                public void execute() {
+                                    current.doB() ;
+                                }
+                        } ;
+    private ICommand cmd_c = new ICommand() {
+                                public void execute() {
+                                    current.doC() ;
+                                }
+                        } ;
+    private ICommand cmd_d = new ICommand() {
+                                public void execute() {
+                                    current.doD() ;
+                                }
+                        } ;
+    private ICommand cmd_e = new ICommand() {
+                                public void execute() {
+                                    current.doE() ;
+                                }
+                        } ;
+    private ICommand cmd_f = new ICommand() {
+                                public void execute() {
+                                    current.doF() ;
+                                }
+                        } ;
+    private ICommand cmd_g = new ICommand() {
+                                public void execute() {
+                                    current.doG() ;
+                                }
+                        } ;
+    private ICommand cmd_h = new ICommand() {
+                                public void execute() {
+                                    current.doH() ;
+                                }
+                        } ;
+
+
+    // enter keypad digits
+    public void key(String cmd) {
+        current.key( cmd ) ;
+    }
+
+    // instruction message
+    public String message() { 
+        return current.message1() + "\n" + current.message2() + "\n" ;
+    }
+
+    // ad message
+    public String advertisement() {
+        return  getAd() ;
+    }
+
+    // key press labels
+    public String A() { return current.A() ; }
+    public String B() { return current.B() ; }
+    public String C() { return current.C() ; }
+    public String D() { return current.D() ; }
+    public String E() { return current.E() ; }
+    public String F() { return current.F() ; }
+    public String G() { return current.G() ; }
+    public String H() { return current.H() ; }
+
+    // key press actions
+    public void selectA() { cmd_a.execute() ; }
+    public void selectB() { cmd_b.execute() ; }
+    public void selectC() { cmd_c.execute() ; }
+    public void selectD() { cmd_d.execute() ; }
+    public void selectE() { cmd_e.execute() ; }
+    public void selectF() { cmd_f.execute() ; }
+    public void selectG() { cmd_g.execute() ; }
+    public void selectH() { cmd_h.execute() ; }
+
+}

demos/gaspump/gaspump_v2/.gradle/buildOutputCleanup/cache.properties

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+#Sat Nov 12 12:12:58 PST 2022
+gradle.version=4.9

demos/gaspump/gaspump_v2/Makefile

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+all: clean
+
+clean: 
+	find . -name "*.class" -exec rm -rf {} \;
+	rm -rf build/*
+	rm -f *.log
+
+init:
+	gradle init
+	mkdir -p libs
+	mkdir -p src/main/java
+	mkdir -p src/test/java
+
+compile:
+	gradle build -x test --warning-mode all
+
+test:
+	gradle test
+
+jar: compile
+	gradle shadowJar
+
+run: jar
+	java -cp build/libs/gaspump-all.jar Main 2>debug.log
+

demos/gaspump/gaspump_v2/build.gradle

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+/*
+ * This build file was auto generated by running the Gradle 'init' task
+ * by 'pnguyen' at '7/30/18 6:20 PM' with Gradle 3.2.1
+ *
+ * This generated file contains a commented-out sample Java project to get you started.
+ * For more details take a look at the Java Quickstart chapter in the Gradle
+ * user guide available at https://docs.gradle.org/3.2.1/userguide/tutorial_java_projects.html
+ */
+
+/*
+// Apply the java plugin to add support for Java
+apply plugin: 'java'
+
+// In this section you declare where to find the dependencies of your project
+repositories {
+    // Use 'jcenter' for resolving your dependencies.
+    // You can declare any Maven/Ivy/file repository here.
+    jcenter()
+}
+
+// In this section you declare the dependencies for your production and test code
+dependencies {
+    // The production code uses the SLF4J logging API at compile time
+    compile 'org.slf4j:slf4j-api:1.7.21'
+
+    // Declare the dependency for your favourite test framework you want to use in your tests.
+    // TestNG is also supported by the Gradle Test task. Just change the
+    // testCompile dependency to testCompile 'org.testng:testng:6.8.1' and add
+    // 'test.useTestNG()' to your build script.
+    testCompile 'junit:junit:4.12'
+}
+*/
+
+
+buildscript {
+    dependencies {
+        classpath fileTree(dir: 'libs', include: '*.jar')
+    }
+}
+
+plugins {
+    id 'java'
+    id 'com.github.johnrengelman.shadow' version '2.0.4'
+}
+
+repositories {
+    jcenter()
+}
+
+dependencies {
+    runtime fileTree(dir: 'libs', include: '*.jar')
+    compile fileTree(dir: 'libs', include: '*.jar')
+    compile group: 'junit', name: 'junit', version: '4.+'
+    compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.21'
+    testCompile group: 'junit', name: 'junit', version: '4.+'
+}
+
+shadowJar {
+    baseName = 'gaspump'
+}
+
+
+
+
+