[Zhitong] ip

src/main/java/Commands.java

@@ -0,0 +1,60 @@
+
+
+public class Commands {
+
+    private static final int MAX_LENGTH = 100;
+    private Task[] tasks = new Task[MAX_LENGTH];
+
+    public int length = 0;
+
+    private boolean isExited = false;
+
+    public Commands() {
+
+    }
+
+    public void accept(String nextLine) {
+
+        int index = (nextLine.indexOf(' '));
+        String commandKeyword = (index == -1)? nextLine : nextLine.substring(0, index).trim();
+
+        final String commandText = (index == -1)? nextLine : nextLine.substring(index).trim();
+        switch (commandKeyword) {
+        case "exit" -> this.isExited = true;
+        case "list" -> this.list();
+        case "add" -> {
+            this.tasks[length] = new Task(nextLine.substring(index));
+            this.echo();
+            length++;
+        }
+        case "mark" -> {
+            this.tasks[Integer.parseInt(commandText)].setDone(true);
+            echo(Integer.parseInt(commandText));
+        }
+        case "unmark" -> {
+            this.tasks[Integer.parseInt(commandText)].setDone(false);
+            echo(Integer.parseInt(commandText));
+        }
+        }
+
+    }
+
+
+    private void list() {
+        for (int i = 0; i < length; i++) {
+            System.out.println( i +": "+ tasks[i]);
+        }
+    }
+
+    private void echo() {
+        System.out.println("added: " + tasks[length]);
+    }
+    private void echo( int index) {
+        System.out.println(tasks[index]);
+    }
+
+    public boolean isAcceptingCommands () {
+        return !isExited;
+    }
+
+}

src/main/java/MrStripes.java

@@ -0,0 +1,18 @@
+
+
+import java.util.Scanner;
+
+public class MrStripes {
+    public static void main(String[] args) {
+
+        System.out.println(Texts.GREETINGS);
+
+        Scanner scanner = new Scanner(System.in);
+        Commands commands = new Commands();
+        while (commands.isAcceptingCommands()) {
+            commands.accept(scanner.nextLine());
+        }
+
+        System.out.println(Texts.GOODBYE);
+    }
+}

src/main/java/Task.java

@@ -0,0 +1,36 @@
+public class Task {
+    private String line;
+    private boolean isDone;
+
+    public String getLine() {
+        return line;
+    }
+
+    public void setLine(String line) {
+        this.line = line;
+    }
+
+    public boolean isDone() {
+        return isDone;
+    }
+
+    public void setDone(boolean done) {
+        isDone = done;
+    }
+
+    public Task(String line, boolean isDone) {
+        this.line = line;
+        this.isDone = isDone;
+    }
+
+    public Task(String line) {
+        this.line = line;
+        this.isDone = false;
+    }
+
+    @Override
+    public String toString() {
+        return "[" + (isDone? "X" : " ") + "]"
+                + line;
+    }
+}

src/main/java/Texts.java

@@ -0,0 +1,6 @@
+
+public class Texts {
+    public static final String GREETINGS = " hello";
+    public static final String GOODBYE = "goodbye";
+
+}