JAVAFX版简易计算器

编写计算器代码时，自定义一个button类，初始化了一些操作

import javafx.scene.control.Button;

public class MyButton extends Button{

	public MyButton(String text) {
		super(text);
		setPrefWidth(35);
		setPrefHeight(30);
	}
}

然后就是程序代码，并没有封装多深

import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.GridPane;
import javafx.scene.text.Font;
import javafx.stage.Stage;

/**
 * 计算器
 */
public class Main extends Application {
	private int number1;//存开始数字 0
	private int number2;//存结束数字 0
	private String logic;//存运算符的变量 null
	private TextField view;
	private boolean flag;//记录第一次点击运算符之后的拼接操作
	private boolean eq;//记录是否按了等号
	public void start(Stage primaryStage) {
		try {
			//创建布局对象
			AnchorPane root = new AnchorPane();
//			root.setBackground(new Background(new BackgroundFill(Color.GRAY, CornerRadii.EMPTY, Insets.EMPTY)));
			//创建场景对象
			Scene scene = new Scene(root);
			primaryStage.setScene(scene);
			//设置窗口宽高
			primaryStage.setWidth(228);
			primaryStage.setHeight(260);
			//设置不能改变大小
			primaryStage.setResizable(false);
			
			//调用方法添加组件
			addComp(root);
			
			primaryStage.show();
		} catch(Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * 该方法是添加组件
	 * @param root
	 */
	private void addComp(AnchorPane root) {
		//添加显示框
		view = new TextField("0");
		view.setMinSize(200, 50);
		view.setLayoutX(10);
		view.setLayoutY(15);
		//设置只读
		view.setEditable(false);
		//内容右对齐
		view.setAlignment(Pos.CENTER_RIGHT);
		//设置字体
		view.setFont(new Font("Consolas", 20));
		root.getChildren().add(view);
		
		//添加一个表格布局
		GridPane gridPane = new GridPane();
		//设置布局中元素组件横向间距
		gridPane.setHgap(20);
		//设置布局中元素组件纵向间距
		gridPane.setVgap(10);
		gridPane.setLayoutY(65);
		gridPane.setPrefWidth(228);
		gridPane.setPrefHeight(185);
//		gridPane.setBackground(new Background(new BackgroundFill(Color.GRAY, CornerRadii.EMPTY, Insets.EMPTY)));
		gridPane.setPadding(new Insets(10));
		//列容器
		root.getChildren().add(gridPane);
		
		//创建数字监听器对象
		NumberEvent numberEvent = new NumberEvent();
		//添加按钮
		Button btn_7 = new MyButton("7");
		btn_7.setOnMouseClicked(numberEvent);
		gridPane.add(btn_7,0,0);
		
		Button btn_8 = new MyButton("8");
		btn_8.setOnMouseClicked(numberEvent);
		gridPane.add(btn_8,1,0);
		
		Button btn_9 = new MyButton("9");
		btn_9.setOnMouseClicked(numberEvent);
		gridPane.add(btn_9,2,0);
		
		Button btn_4 = new MyButton("4");
		btn_4.setOnMouseClicked(numberEvent);
		gridPane.add(btn_4,0,1);
		
		Button btn_5 = new MyButton("5");
		btn_5.setOnMouseClicked(numberEvent);
		gridPane.add(btn_5,1,1);
		
		Button btn_6 = new MyButton("6");
		btn_6.setOnMouseClicked(numberEvent);
		gridPane.add(btn_6,2,1);
		
		Button btn_1 = new MyButton("1");
		btn_1.setOnMouseClicked(numberEvent);
		gridPane.add(btn_1,0,2);
		
		Button btn_2 = new MyButton("2");
		btn_2.setOnMouseClicked(numberEvent);
		gridPane.add(btn_2,1,2);
		
		Button btn_3 = new MyButton("3");
		btn_3.setOnMouseClicked(numberEvent);
		gridPane.add(btn_3,2,2);
		
		Button btn_0 = new MyButton("0");
		btn_0.setOnMouseClicked(numberEvent);
		gridPane.add(btn_0,0,3);
		
		Button btn_C = new MyButton("C");
		btn_C.setOnMouseClicked(new EventHandler() {
			public void handle(Event event) {
				clean();
			}
		});
		gridPane.add(btn_C,1,3);
		
		Button btn_eq = new MyButton("=");
		btn_eq.setOnMouseClicked(new EventHandler() {
			public void handle(Event event) {
				//记录运算结构
				switch (logic) {
				case "+":
					number1 = number1+number2;
					break;
				case "-":
					number1 = number1-number2;
					break;
				case "*":
					number1 = number1*number2;
					break;
				case "/":
					number1 = number1/number2;
					break;

				default:
					break;
				}
				//把结果显示回显示框
				view.setText(number1+"");
				//按了等号
				eq = true;
			}
		});
		gridPane.add(btn_eq,2,3);
		//运算符的按钮
		
		//创建监听器对象
		LogicEvent logicEvent = new LogicEvent();
		Button btn_add = new MyButton("+");
		//给按钮添加事件监听器
		btn_add.setOnMouseClicked(logicEvent);
		gridPane.add(btn_add,3,0);
		Button btn_sub = new MyButton("-");
		btn_sub.setOnMouseClicked(logicEvent);
		gridPane.add(btn_sub,3,1);
		Button btn_mul = new MyButton("*");
		btn_mul.setOnMouseClicked(logicEvent);
		gridPane.add(btn_mul,3,2);
		Button btn_div = new MyButton("/");
		btn_div.setOnMouseClicked(logicEvent);
		gridPane.add(btn_div,3,3);
	}
	
	public static void main(String[] args) {
		launch(args);
	}
	/**
	 * 数字监听器
	 */
	class NumberEvent implements EventHandler{
		public void handle(Event event) {
			//如果上一次是等号，得先清除一次
			if (eq) {
				clean();
			}
			
			/**
			 *  ①判断运算符变量是否有值
				②如果有值，将按钮的内容保存到2中的变量
				③如果没有值，将按钮的内容保存到1中的变量
			 */
			//获取当前显示框内容
			String text = view.getText();
			//获取事件源  (获取触发事件的按钮)
			MyButton btn = (MyButton)event.getSource();
			//先获取当前按钮的内容
			String btnNumber = btn.getText();
			//将显示框原本的数字拼接当前按钮的数字
			if (flag) {
				text = "0";
				flag = false;
			}
			text+=btnNumber;
			//将字符串转换为int类型
			int num = Integer.parseInt(text);
			//没有点击运算符按钮
			if (logic==null) {
				number1 = num;
				view.setText(number1+"");
			//点击了运算符按钮
			}else {
				number2 = num;
				view.setText(number2+"");
			}
		}
	}
	/**
	 * 运算符的事件监听器
	 */
	class LogicEvent implements EventHandler{

		public void handle(Event event) {
			//得到按钮
			MyButton logicBtn = (MyButton)event.getSource();
			//获取按钮内容
			logic = logicBtn.getText();
			flag = true;
			eq = false;
		}
		
	}
	/**
	 * 清除计算器参与逻辑的变量
	 */
	private void clean() {
		number1 = 0;
		number2 = 0;
		logic = null;
		flag = false;
		eq = false;
		//显示0
		view.setText("0");
	}
}