Tester.java

java.util.ArrayList; 
import javafx.geometry.Pos; 
import javafx.application.Application; 
import javafx.scene.Scene; 
import javafx.scene.control.Button; 
import javafx.stage.Stage; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler; 
import javafx.scene.layout.Pane; 
import javafx.scene.layout.HBox; 
import javafx.scene.layout.GridPane; 
public class Tester extends Application 
{ 
static int first=0; 
static boolean firstDone=false; 
static int second=0; 
static int operation = 0; 
static int answer = 0; 
static boolean continuing=false; 
public static void main(String[] args) 
{ 
Application.launch(args); 
} 
public void start(Stage primaryStage) 
{ 
GridPane pane = new GridPane(); 
Button one = new Button("1"); 
Button two = new Button("2"); 
Button three = new Button("3"); 
Button four = new Button("4"); 
Button five = new Button("5"); 
Button six = new Button("6"); 
Button seven = new Button("7"); 
Button eight = new Button("8"); 
Button nine = new Button("9"); 
Button zero = new Button("0"); 
Button add = new Button("+"); 
Button subtract = new Button("-"); 
Button multiply = new Button("x"); 
Button divide = new Button("/"); 
Button equals = new Button("="); 
Button clear = new Button("C"); 
BtnHandler1 handler1 = new BtnHandler1 (); 
BtnHandler2 handler2 = new BtnHandler2 (); 
BtnHandler3 handler3 = new BtnHandler3 (); 
BtnHandler4 handler4 = new BtnHandler4 (); 
BtnHandler5 handler5 = new BtnHandler5 (); 
BtnHandler6 handler6 = new BtnHandler6 (); 
BtnHandler7 handler7 = new BtnHandler7 (); 
BtnHandler8 handler8 = new BtnHandler8 (); 
BtnHandler9 handler9 = new BtnHandler9 (); 
BtnHandler0 handler0 = new BtnHandler0 (); 
BtnHandlerPlus handlerPlus = new BtnHandlerPlus (); 
BtnHandlerMinus handlerMinus = new BtnHandlerMinus (); 
BtnHandlerTimes handlerTimes = new BtnHandlerTimes (); 
BtnHandlerDivide handlerDivide = new BtnHandlerDivide (); 
BtnHandlerEquals handlerEquals = new BtnHandlerEquals (); 
BtnHandlerClear handlerClear = new BtnHandlerClear (); 
one.setOnAction(handler1); 
two.setOnAction(handler2); 
three.setOnAction(handler3); 
four.setOnAction(handler4); 
five.setOnAction(handler5); 
six.setOnAction(handler6); 
seven.setOnAction(handler7); 
eight.setOnAction(handler8); 
nine.setOnAction(handler9); 
zero.setOnAction(handler0); 
add.setOnAction(handlerPlus); 
subtract.setOnAction(handlerMinus); 
multiply.setOnAction(handlerTimes); 
divide.setOnAction(handlerDivide); 
equals.setOnAction(handlerEquals); 
clear.setOnAction(handlerClear); 
pane.add(seven, 0, 0); 
pane.add(eight, 1, 0); 
pane.add(nine, 2, 0); 
pane.add(four, 0, 1); 
pane.add(five, 1, 1); 
pane.add(six, 2, 1); 
pane.add(one, 0, 2); 
pane.add(two, 1, 2); 
pane.add(three, 2, 2); 
pane.add(divide, 3, 0); 
pane.add(multiply, 3, 1); 
pane.add(add, 3, 2); 
pane.add(subtract, 3, 3); 
pane.add(equals, 2, 3); 
pane.add(clear, 0, 3); 
pane.add(zero, 1, 3); 
Scene scene = new Scene(pane); 
primaryStage.setScene(scene); 
primaryStage.show(); 
} 
} class BtnHandler1 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+1; 
else 
Tester.second=Tester.second*10+1; 
System.out.print("1"); 
} 
} 
class BtnHandler2 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+2; 
else 
Tester.second=Tester.second*10+2; 
System.out.print("2"); 
} 
} class BtnHandler3 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+3; 
else 
Tester.second=Tester.second*10+3; 
System.out.print("3"); 
} 
} class BtnHandler4 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+4; 
else 
Tester.second=Tester.second*10+4; 
System.out.print("4"); 
} 
} class BtnHandler5 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+5; 
else 
Tester.second=Tester.second*10+5; 
System.out.print("5"); 
} 
} class BtnHandler6 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+6; 
else 
Tester.second=Tester.second*10+6; 
System.out.print("6"); 
} 
} class BtnHandler7 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+7; 
else 
Tester.second=Tester.second*10+7; 
System.out.print("7"); 
} 
} class BtnHandler8 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+8; 
else 
Tester.second=Tester.second*10+8; 
System.out.print("8"); 
} 
} class BtnHandler9 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10+9; 
else 
Tester.second=Tester.second*10+9; 
System.out.print("9"); 
} 
} 
class BtnHandler0 implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
if (Tester.continuing) 
{ 
Tester.first=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
if (!Tester.firstDone) 
Tester.first=Tester.first*10; 
else 
Tester.second=Tester.second*10; 
System.out.print("0"); 
} 
} class BtnHandlerPlus implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
Tester.continuing=false; 
Tester.firstDone=true; 
Tester.operation = 1; 
System.out.println(); 
System.out.println("+ "); 
} 
} class BtnHandlerMinus implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
Tester.continuing=false; 
Tester.firstDone=true; 
Tester.operation = 2; 
System.out.println(); 
System.out.println("- "); 
} 
} class BtnHandlerTimes implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
Tester.continuing=false; 
Tester.firstDone=true; 
Tester.operation = 3; 
System.out.println(); 
System.out.println("x "); 
} 
} 
class BtnHandlerDivide implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
Tester.continuing=false; 
Tester.firstDone=true; 
Tester.operation = 4; 
System.out.println(); 
System.out.println("/ "); 
} 
} class BtnHandlerEquals implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
System.out.println(); 
System.out.println("_____"); 
if (Tester.operation==1) 
{ 
Tester.answer = Tester.first + Tester.second; 
} 
else if (Tester.operation==2) 
{ 
Tester.answer = Tester.first - Tester.second; 
} 
else if (Tester.operation==3) 
{ 
Tester.answer = Tester.first * Tester.second; 
} 
else if (Tester.operation==4) 
{ 
Tester.answer = Tester.first / Tester.second; 
} 
System.out.println(Tester.answer); 
System.out.println(); 
System.out.println(); 
Tester.first = Tester.answer; 
Tester.second = 0; 
Tester.continuing=true; 
Tester.firstDone=true; 
} 
} class BtnHandlerClear implements EventHandler<ActionEvent> 
{ 
public void handle(ActionEvent e) 
{ 
System.out.println(); 
System.out.println(); 
Tester.first=0; 
Tester.second=0; 
Tester.continuing=false; 
Tester.firstDone=false; 
} 
}