split Stack.java and Functions.java

Author: l1m9n

src/main/java/io/stack_community/github/stack_java/Functions.java

@@ -0,0 +1,43 @@
+package io.stack_community.github.stack_java;
+
+public record Functions(Stack.Executor executor, String command) {
+    public Functions {
+        // Commands of calculation
+
+        // addition
+        if (command.equals("add")) {
+            double b = executor.popStack().getNumber();
+            double a = executor.popStack().getNumber();
+            executor.stack.add(new Stack.Type(Stack.Type.TypeEnum.NUMBER, a + b));
+        }
+
+        // Subtraction
+        else if (command.equals("sub")) {
+            double b = executor.popStack().getNumber();
+            double a = executor.popStack().getNumber();
+            executor.stack.add(new Stack.Type(Stack.Type.TypeEnum.NUMBER, a - b));
+        }
+
+        // Pop in stack
+        else if (command.equals("pop")) {
+            executor.popStack();
+        }
+
+        // Exit Stack
+        else if (command.equals("exit")) {
+            double code = executor.popStack().getNumber();
+            executor.exitmode = true;
+            executor.exitcode = (int) code;
+            if (executor.interpreterMode == false) {
+                System.exit(executor.exitcode);
+            }
+        }
+
+        // TODO Other commands...
+
+        // When other string inputted
+        else {
+            executor.stack.add(new Stack.Type(Stack.Type.TypeEnum.STRING, command));
+        }
+    }
+}

src/main/java/io/stack_community/github/stack_java/Stack.java

@@ -25,16 +25,16 @@ public void interpreter(String[] args) {
         Executor executor = new Stack.Executor(Mode.Debug, true);
         // REPL Execution
         while (!executor.exitmode) {
-            String code = "";
+            StringBuilder code = new StringBuilder();
             while (!executor.exitmode) {
                 String enter = input(br, "> ");
-                code += enter + "\n";
-                if (enter.equals("")) {
+                code.append(enter).append("\n");
+                if (enter.isEmpty()) {
                     break;
                 }
             }
 
-            executor.evaluateProgram(code);
+            executor.evaluateProgram(code.toString());
         }
 
         try {
@@ -206,7 +206,7 @@ public static enum Mode {
     }
 
     public static class Executor {
-        private List<Type> stack; // Data stack
+        protected List<Type> stack; // Data stack
         private Map<String, Type> memory; // Variable's memory
         private Mode mode; // Execution mode
         public boolean exitmode = false;
@@ -390,43 +390,7 @@ public void evaluateProgram(String code) { // evaluate string as program
 
         // execute string as commands
         public void executeCommand(String command) {
-            // Commands of calculation
-
-            // addition
-            if (command.equals("add")) {
-                double b = this.popStack().getNumber();
-                double a = this.popStack().getNumber();
-                this.stack.add(new Type(Type.TypeEnum.NUMBER, a + b));
-            }
-
-            // Subtraction
-            else if (command.equals("sub")) {
-                double b = this.popStack().getNumber();
-                double a = this.popStack().getNumber();
-                this.stack.add(new Type(Type.TypeEnum.NUMBER, a - b));
-            }
-
-            // Pop in stack
-            else if (command.equals("pop")) {
-                this.popStack();
-            }
-
-            // Exit Stack
-            else if (command.equals("exit")) {
-                double code = this.popStack().getNumber();
-                this.exitmode = true;
-                this.exitcode = (int) code;
-                if (this.interpreterMode == false) {
-                    System.exit(exitcode);
-                }
-            }
-
-            // TODO Other commands...
-
-            // When other string inputted
-            else {
-                this.stack.add(new Type(Type.TypeEnum.STRING, command));
-            }
+            new Functions(this, command);
         }
 
         public Type popStack() { // Pop stack's top value