これを行うためのより良い方法があることは十分に承知していますが、最終的に機能する限り、4 + 4 のような操作を行うたびに完全に満足していますが、4 + 4 * 2 のような操作を行うと、等しい 32
package calc;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
/**
*
* @author Ben
*/
public class GUI extends JFrame {
int response, operator;
double num1, num2, total = 0;
String operation, answer, num, testnum;
private JButton one, two, three, four, five, six, seven, eight,
nine, zero, multiply, divide, subtract, add, equals, clear;
private JTextField display, fakedisplay;
public GUI() {
super("Calculator");
setLayout(new FlowLayout());
fakedisplay = new JTextField(10);
display = new JTextField(10);;
add(display);
one = new JButton("1");
add(one);
two = new JButton("2");
add(two);
three = new JButton("3");
add(three);
four = new JButton("4");
add(four);
five = new JButton("5");
add(five);
six = new JButton("6");
add(six);
seven = new JButton("7");
add(seven);
eight = new JButton("8");
add(eight);
nine = new JButton("9");
add(nine);
zero = new JButton("0");
add(zero);
multiply = new JButton("*");
add(multiply);
divide = new JButton("/");
add(divide);
subtract = new JButton("-");
add(subtract);
add = new JButton("+");
add(add);
equals = new JButton("=");
add(equals);
clear = new JButton("Clear");
add(clear);
handler handle = new handler();
one.addActionListener(handle);
two.addActionListener(handle);
three.addActionListener(handle);
four.addActionListener(handle);
five.addActionListener(handle);
six.addActionListener(handle);
seven.addActionListener(handle);
eight.addActionListener(handle);
nine.addActionListener(handle);
zero.addActionListener(handle);
multiply.addActionListener(handle);
divide.addActionListener(handle);
subtract.addActionListener(handle);
add.addActionListener(handle);
equals.addActionListener(handle);
clear.addActionListener(handle);
}
private class handler implements ActionListener {
@
Override
public void actionPerformed(ActionEvent e) {
if(e.getSource() == one) {
response = 1;
display.setText(display.getText() + 1);
fakedisplay.setText(fakedisplay.getText() + 1);
} else if(e.getSource() == two) {
response = 2;
display.setText(display.getText() + 2);
fakedisplay.setText(fakedisplay.getText() + 2);
} else if(e.getSource() == three) {
response = 3;
display.setText(display.getText() + 3);
fakedisplay.setText(fakedisplay.getText() + 3);
} else if(e.getSource() == four) {
response = 4;
display.setText(display.getText() + 4);
fakedisplay.setText(fakedisplay.getText() + 4);
} else if(e.getSource() == five) {
response = 5;
display.setText(display.getText() + 5);
fakedisplay.setText(fakedisplay.getText() + 5);
} else if(e.getSource() == six) {
response = 6;
display.setText(display.getText() + 6);
fakedisplay.setText(fakedisplay.getText() + 6);
} else if(e.getSource() == seven) {
response = 7;
display.setText(display.getText() + 7);
fakedisplay.setText(fakedisplay.getText() + 7);
} else if(e.getSource() == eight) {
response = 8;
display.setText(display.getText() + 8);
fakedisplay.setText(fakedisplay.getText() + 8);
} else if(e.getSource() == nine) {
response = 9;
display.setText(display.getText() + 9);
fakedisplay.setText(fakedisplay.getText() + 9);
} else if(e.getSource() == zero) {
response = 0;
display.setText(display.getText() + 0);
fakedisplay.setText(fakedisplay.getText() + 0);
} else if(e.getSource() == multiply) {
if(operator == 0 && num1 == 0) {
num1 = Double.parseDouble(display.getText());
operator = 3;
fakedisplay.setText("");
} else if(operator != 0) {
operator = 3;
num2 = Double.parseDouble(fakedisplay.getText());
fakedisplay.setText("");
if(operator == 1) {
total = num1 + num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 2) {
total = num1 - num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 3) {
total = num1 * num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 4) {
total = num1 / num2 + num1 % num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
num2 = 0;
total = 0;
fakedisplay.setText("");
operator = 0;
}
operation = "*";
display.setText(display.getText() + operation);
} else if(e.getSource() == divide) {
if(operator == 0 && num1 == 0) {
num1 = Double.parseDouble(display.getText());
operator = 4;
fakedisplay.setText("");
} else if(total == 0) {
operator = 3;
} else if(operator != 0) {
operator = 4;
num2 = Double.parseDouble(fakedisplay.getText());
fakedisplay.setText("");
if(operator == 1) {
total = num1 + num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 2) {
total = num1 - num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 3) {
total = num1 * num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 4) {
total = num1 / num2 + num1 % num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
num2 = 0;
total = 0;
fakedisplay.setText("");
operator = 0;
}
operation = "/";
display.setText(display.getText() + operation);
} else if(e.getSource() == add) {
if(operator == 0 && num1 == 0) {
num1 = Double.parseDouble(display.getText());
operator = 1;
fakedisplay.setText("");
} else if(operator != 0) {
operator = 1;
num2 = Double.parseDouble(fakedisplay.getText());
fakedisplay.setText("");
if(operator == 1) {
total = num1 + num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 2) {
total = num1 - num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 3) {
total = num1 * num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 4) {
total = num1 / num2 + num1 % num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
num2 = 0;
total = 0;
fakedisplay.setText("");
operator = 0;
}
operation = "+";
display.setText(display.getText() + operation);
} else if(e.getSource() == subtract) {
if(operator == 0 && num1 == 0) {
num1 = Double.parseDouble(display.getText());
operator = 2;
fakedisplay.setText("");
} else if(operator != 0) {
operator = 2;
num2 = Double.parseDouble(fakedisplay.getText());
fakedisplay.setText("");
if(operator == 1) {
total = num1 + num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 2) {
total = num1 - num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 3) {
total = num1 * num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
if(operator == 4) {
total = num1 / num2 + num1 % num2;
display.setText(display.getText() + operation + total);
num1 = total;
}
num2 = 0;
total = 0;
fakedisplay.setText("");
operator = 0;
}
operation = "-";
display.setText(display.getText() + operation);
} else if(e.getSource() == equals) {
if(operator == 0) {
display.setText("Error");
} else if(operator != 0) {
num2 = Double.parseDouble(fakedisplay.getText());
fakedisplay.setText("");
if(operator == 1) {
total = num1 + num2;
display.setText(display.getText() + "=" + total);
}
if(operator == 2) {
total = num1 - num2;
display.setText(display.getText() + "=" + total);
}
if(operator == 3) {
total = num1 * num2;
display.setText(display.getText() + "=" + total);
}
if(operator == 4) {
total = num1 / num2 + num1 % num2;
display.setText(display.getText() + "=" + total);
}
}
operation = "=";
} else if(e.getSource() == clear) {
display.setText("");
fakedisplay.setText("");
operator = 0;
total = 0;
num1 = 0;
num2 = 0;
}
System.out.println("num1: " + num1 + " num2: " + num2 + "\ndisplay: " + display.getText() + " fakedisplay: " + fakedisplay.getText() + "\nresponse: " + response + "\noperator: " + operator + "\ntotal: " + total + "\n==========================");
}
}
}