嘿，我是java的初学者，我只是在短时间内这样做，无论如何我最后的项目在java基础知识我需要用gui制作一个简单的计算器，我想它不会那样很难，但我有点不对劲：P我已经设法做了最多（我认为），但我坚持使用事件处理操作和设置值来计算，这是我的代码，你能不能给我建议或提示如何做到这一点：D
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.value.WritableObjectValue;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
public class Calculator extends Application {
private DoubleProperty value = new SimpleDoubleProperty();
@Override
public void start(Stage primaryStage) {
FlowPane pane = new FlowPane();
pane.setAlignment(Pos.CENTER);
pane.setPadding(new Insets ( 30 , 20 , 30 , 20));
pane.setHgap(5);
pane.setVgap(5);
pane.setMinWidth(400);
pane.setPrefWidth(400);
pane.setMaxWidth(400);
TextField Rezultat = new TextField();
Rezultat.setEditable(false);
Rezultat.setAlignment(Pos.CENTER);
Rezultat.setMinSize(336, 40);
Rezultat.textProperty().bind(Bindings.format("%.0f" , value));
pane.getChildren().add(Rezultat);
Button sedmica = new Button("7");
Button osmica = new Button("8");
Button devetka = new Button("9");
Button plus = new Button("+");
sedmica.setMinSize(80, 80);
osmica.setMinSize(80, 80);
devetka.setMinSize(80, 80);
plus.setMinSize(80, 80);
pane.getChildren().add(sedmica);
sedmicaHandler handler7 = new sedmicaHandler();
sedmica.setOnAction(handler7);
pane.getChildren().add(osmica);
osmicaHandler handler8 = new osmicaHandler();
osmica.setOnAction(handler8);
pane.getChildren().add(devetka);
devetkaHandler handler9 = new devetkaHandler();
devetka.setOnAction(handler9);
pane.getChildren().add(plus);
plusHandler handlerplus = new plusHandler();
plus.setOnAction(handlerplus);
Button cetvorka = new Button("4");
Button petica = new Button("5");
Button sestica = new Button("6");
Button minus = new Button("-");
cetvorka.setMinSize(80, 80);
petica.setMinSize(80, 80);
sestica.setMinSize(80, 80);
minus.setMinSize(80, 80);
pane.getChildren().add(cetvorka);
cetvorkaHandler handler4 = new cetvorkaHandler();
cetvorka.setOnAction(handler4);
pane.getChildren().add(petica);
peticaHandler handler5 = new peticaHandler();
petica.setOnAction(handler5);
pane.getChildren().add(sestica);
sesticaHandler handler6 = new sesticaHandler();
sestica.setOnAction(handler6);
pane.getChildren().add(minus);
minusHandler handlerminus = new minusHandler();
minus.setOnAction(handlerminus);
Button trica = new Button("3");
Button dvica = new Button("2");
Button jedinica = new Button("1");
Button puta = new Button("*");
trica.setMinSize(80, 80);
dvica.setMinSize(80, 80);
jedinica.setMinSize(80, 80);
puta.setMinSize(80, 80);
pane.getChildren().add(jedinica);
jedinicaHandler handler1 = new jedinicaHandler();
jedinica.setOnAction(handler1);
pane.getChildren().add(dvica);
dvicaHandler handler2 = new dvicaHandler();
dvica.setOnAction(handler2);
pane.getChildren().add(trica);
tricaHandler handler3 = new tricaHandler();
trica.setOnAction(handler3);
pane.getChildren().add(puta);
putaHandler handlerputa = new putaHandler();
puta.setOnAction(handlerputa);
Button nula = new Button("0");
Button jednako = new Button("=");
Button podijeljeno = new Button("/");
Button EE = new Button ("EE");
nula.setMinSize(80, 80);
jednako.setMinSize(80, 80);
podijeljeno.setMinSize(80, 80);
EE.setMinSize(80, 80);
pane.getChildren().add(EE);
EEHandler handlerEE = new EEHandler();
EE.setOnAction(handlerEE);
pane.getChildren().add(nula);
nulaHandler handler0 = new nulaHandler();
nula.setOnAction(handler0);
pane.getChildren().add(jednako);
jednakoHandler handlerjednako = new jednakoHandler();
jednako.setOnAction(handlerjednako);
pane.getChildren().add(podijeljeno);
podijeljenoHandler handlerpodijeljeno = new podijeljenoHandler();
podijeljeno.setOnAction(handlerpodijeljeno);
Scene scene = new Scene(pane);
primaryStage.setTitle("Calculator");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main (String[] args) {
Application.launch(args);
}
}
class nulaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
value.set(0);
}
}
class jedinicaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("1");
}
}
class dvicaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("2");
}
}
class tricaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("3");
}
}
class cetvorkaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("4");
}
}
class peticaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("5");
}
}
class sesticaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("6");
}
}
class sedmicaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("7");
}
}
class osmicaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("8");
}
}
class devetkaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("9");
}
}
class plusHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("+");
}
}
class minusHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("-");
}
}
class putaHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("*");
}
}
class podijeljenoHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("/");
}
}
class jednakoHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("=");
}
}
class EEHandler implements EventHandler<ActionEvent>{
@Override
public void handle(ActionEvent e){
System.out.println("EE");
}
}
我的处理程序只是基本的，他们将数字打印到控制台，所以你可以忽略它们，我看到一些带有value.set命令的例子我应该和它们一起使用还是？请帮助截止日期为2周 . 非常感谢
2 回答
我不会为你做功课，只是一些提示：
想想按下按钮时你期望发生什么：
如果你按5 '-' '+' 55，你的计算器应该做什么 . 它应该从5减去或增加55）
你想计算多个操作吗？ （5 5 5 5/5）
十进制数怎么样？ （根据您目前的设计，您无法填写）
并且你为每个按钮做了几乎相同的事情 . （或者至少10个按钮你有相同的逻辑）你可以在一个循环中创建你的应用程序：
public class View extends Application {
}
公共类模型{
}
公共类控制器{
}