TODO-list
Simple commandline based ToDo-list
import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; import java.util.Scanner; public class TODO { ArrayList<String> list; BufferedReader in; BufferedWriter out; public static void main(String[] args) { TODO t = new TODO(); t.init(); } public void init() { list = new ArrayList<String>(); try { in = new BufferedReader(new FileReader("todo.list")); readFile(); } catch (FileNotFoundException e) { System.out.println(e); System.out.println("if this is first time you run this program, ignore this error"); } catch (IOException e) { } try { out = new BufferedWriter(new FileWriter("todo.list")); } catch (IOException e) { System.out.println(e); System.exit(0); } System.out.println("type 'help' for help"); printList(); run(); } public void readFile() throws IOException { String line; while ((line = in.readLine()) != null) { list.add(line); } } public void addLine(String line) { if (!(line == null || line.equals(""))) { list.add(line); } } public void removeLine(int id) { if (!(id > list.size())) list.remove(id); } public void saveList() { for (int i = 0; i < list.size(); i++) { String line; line = list.get(i); try { out.write(line + "\n"); } catch (IOException e) { System.out.println(e); System.exit(0); } } } public void printList() { System.out.println("TODO:"); for (int i = 0; i < list.size(); i++) { System.out.println(i +": " + list.get(i)); } } public void run() { while(true) { Scanner cin = new Scanner(System.in); String sin = cin.nextLine(); if (sin.equals("exit")) { saveList(); try { in.close(); out.close(); } catch (IOException e) { System.out.println(e); } catch (NullPointerException e) { } System.exit(0); } if (sin.startsWith("add")) { addLine(sin.substring(4)); System.out.println("entry added: " + sin.substring(4)); } if (sin.startsWith("remove")) { int index = Integer.parseInt(sin.substring(7)); removeLine(index); System.out.println("entry removed: " + index); } if (sin.equals("list")) { printList(); } if (sin.equals("help")) { System.out.println("======================================================="); System.out.println("add <something to do> | adds todo-entry to list"); System.out.println("remove <index> | removes todo-entry from list"); System.out.println("list | prints list"); System.out.println("help | prints this help"); System.out.println("exit | closes TODO"); System.out.println("======================================================="); } } } }

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