java 入门 简易通讯录

//package work import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileReader; import java.io.FileWriter; import java.util.ArrayList; import java.util.List; import javafx.application.Application; import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Alert; import javafx.scene.control.Alert.AlertType; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.control.TableView; import javafx.scene.control.TextField; import javafx.scene.layout.HBox; import javafx.scene.layout.VBox; import javafx.stage.Stage; public class App extends Application { // ObservableList��һ���ӿ�������ٸ��ĵ��б� // FXCollection��һ����ʵ�ó�����ӳ�䵽java.util.Collections ObservableList<Contact> lists = FXCollections.observableArrayList(); TableView<Contact> table = new TableView<Contact>(lists); List<User> users = new ArrayList<User>(); List<Contact> contacts = new ArrayList<Contact>(); @Override public void start(Stage primaryStage) throws Exception { VBox root = new VBox(); root.setSpacing(8); root.setAlignment(Pos.CENTER); TextField username = new TextField(); HBox h1 = new HBox(new Label("Username "), username); TextField psw = new TextField(); HBox h2 = new HBox(new Label("Password "), psw); h1.setAlignment(Pos.CENTER); h2.setAlignment(Pos.CENTER); Button login = new Button("Login"); root.getChildren().addAll(h1, h2, login); Scene scene = new Scene(root, 300, 200); primaryStage.setScene(scene); primaryStage.show(); primaryStage.setTitle("Contact Manage"); login.setOnAction(event -> { boolean isfind = false; for (User u : users) { if (username.getText().equals(u.getName()) && psw.getText().equals(u.getPsw())) { isfind = true; // primaryStage.setScene(main()); primaryStage.centerOnScreen(); } } if (!isfind) { new Alert(AlertType.ERROR, "Login fail").showAndWait(); } }); BufferedReader reader = new BufferedReader(new FileReader("src/datas.txt")); String line = ""; while ((line = reader.readLine()) != null) { String[] split = line.split(" +"); if ("u".equals(split[0])) { users.add(new User(split[1], split[2])); } else { contacts.add(new Contact(split[1], split[2])); } } reader.close(); } public void add() { Stage stage = new Stage(); TextField name = new TextField(); TextField mobile = new TextField(); Button add = new Button("Add"); VBox root = new VBox(new Label("Name"), name, new Label("Mobile"), mobile, add); root.setSpacing(10); Scene scene = new Scene(root, 200, 160); stage.setScene(scene); add.setOnAction(event -> { if (name.getText().length() > 0 && mobile.getText().length() > 0) { lists.add(new Contact(name.getText(), mobile.getText())); contacts.clear(); contacts.addAll(lists); stage.close(); save(); } }); stage.showAndWait(); } public void modify(Contact item) { Stage stage = new Stage(); TextField name = new TextField(item.getName()); TextField mobile = new TextField(item.getMobile()); Button button = new Button("modify"); VBox root = new VBox(new Label("Name"), name, new Label("Mobile"), mobile, button); root.setSpacing(10); Scene scene = new Scene(root, 200, 160); stage.setScene(scene); button.setOnAction(event -> { if (name.getText().length() > 0 && mobile.getText().length() > 0) { item.setName(name.getText()); item.setMobile(mobile.getText()); table.refresh(); stage.close(); contacts.clear(); contacts.addAll(lists); save(); } }); stage.showAndWait(); } public void delete(Contact item) { Stage stage = new Stage(); Button button = new Button("OK"); VBox root = new VBox(new Label("Delete " + item.getName() + " ?"), button); root.setAlignment(Pos.CENTER); root.setSpacing(10); Scene scene = new Scene(root, 180, 120); stage.setScene(scene); button.setOnAction(event -> { lists.remove(item); stage.close(); contacts.clear(); contacts.addAll(lists); save(); }); stage.showAndWait(); } public void save() { try { BufferedWriter writer = new BufferedWriter(new FileWriter("datas.txt")); for (User user : users) { writer.write("u " + user.getName() + " " + user.getPsw()+"\n"); } for (Contact contact : contacts) { writer.write("c " + contact.getName() + " " + contact.getMobile()+"\n"); } writer.flush(); writer.close(); } catch (Exception e) { e.printStackTrace(); } } // public static void main(String[] args) { // launch(args); // } }