package com.gui;
import javax.swing.;
import java.awt.;
public class gui {
static Double a;
static Double b;
static String string = "";
static String fuhao = "";
public static void main(String[] args) {
JFrame frame = new JFrame();//实例化一个窗口
GridLayout layout = new GridLayout(2, 1);//实例化一个网格布局管理器
frame.setLayout(layout);//窗口应用布局管理器
frame.setSize(400, 500);//设置窗口宽高
frame.setLocation(300, 200);//设置窗口初始显示位置
frame.setVisible(true);//将窗口设置为可见
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗口关闭的操作
//上边面板
JPanel panel1 = new JPanel();
//记录文本框
JTextField textField1 = new JTextField(20);
textField1.setHorizontalAlignment(SwingConstants.RIGHT);//将文本水平对齐方式设置为靠右
textField1.setEditable(false);//设置为不可编辑
JLabel label = new JLabel("记录");
//计数文本框
JTextField textField = new JTextField(20);
textField.setHorizontalAlignment(SwingConstants.RIGHT);//将文本水平对齐方式设置为靠右
textField.setEditable(false);//设置为不可编辑
//添加一个Clear按钮
JButton buttonClear = new JButton("Clear");
//将上述控件添加到panel1面板
panel1.add(textField1);
panel1.add(label);
panel1.add(textField);
panel1.add(buttonClear);
//为Clear按钮注册监听器
buttonClear.addActionListener(e -> {
textField.setText("");
textField1.setText("");
a = 0.0;
b = 0.0;
string = "";
fuhao = "";
});
frame.add(panel1);//将panel1面板添加到窗口上
//下边面板
JPanel panel2 = new JPanel();
GridLayout gridLayout = new GridLayout(4, 4);//网格布局管理器
panel2.setLayout(gridLayout);//应用该布局管理器
//实例化一些按钮
JButton button7 = new JButton("7");
panel2.add(button7);
JButton button8 = new JButton("8");
panel2.add(button8);
JButton button9 = new JButton("9");
panel2.add(button9);
JButton buttonChu = new JButton("/");
panel2.add(buttonChu);
JButton button4 = new JButton("4");
panel2.add(button4);
JButton button5 = new JButton("5");
panel2.add(button5);
JButton button6 = new JButton("6");
panel2.add(button6);
JButton buttonCheng = new JButton("*");
panel2.add(buttonCheng);
JButton button1 = new JButton("1");
panel2.add(button1);
JButton button2 = new JButton("2");
panel2.add(button2);
JButton button3 = new JButton("3");
panel2.add(button3);
JButton buttonJian = new JButton("-");
panel2.add(buttonJian);
JButton button0 = new JButton("0");
panel2.add(button0);
JButton buttonDian = new JButton(".");
panel2.add(buttonDian);
JButton buttonDeng = new JButton("=");
panel2.add(buttonDeng);
JButton buttonJia = new JButton("+");
panel2.add(buttonJia);
//为每一个数字按钮注册监听器
button0.addActionListener(e -> {
string = string + "0";
textField.setText(string);
});
button1.addActionListener(e -> {
string = string + "1";
textField.setText(string);
});
button2.addActionListener(e -> {
string = string + "2";
textField.setText(string);
});
button3.addActionListener(e -> {
string = string + "3";
textField.setText(string);
});
button4.addActionListener(e -> {
string = string + "4";
textField.setText(string);
});
button5.addActionListener(e -> {
string = string + "5";
textField.setText(string);
});
button6.addActionListener(e -> {
string = string + "6";
textField.setText(string);
});
button7.addActionListener(e -> {
string = string + "7";
textField.setText(string);
});
button8.addActionListener(e -> {
string = string + "8";
textField.setText(string);
});
button9.addActionListener(e -> {
string = string + "9";
textField.setText(string);
});
buttonDian.addActionListener(e -> {
string = string + ".";
textField.setText(string);
});
//为符号键注册监听器
buttonJia.addActionListener(e -> {
a = Double.parseDouble(textField.getText());//获取第一个操作数
fuhao = "+";//获取符号
textField1.setText(textField.getText() + fuhao);//将其显示在记录文本框
textField.setText("");//然后清空关于第一个操作数的记录,方便后续的连续计算
string = "";
});
buttonJian.addActionListener(e -> {
a = Double.parseDouble(textField.getText());
fuhao = "-";
textField1.setText(textField.getText() + fuhao);
textField.setText("");
string = "";
});
buttonCheng.addActionListener(e -> {
a = Double.parseDouble(textField.getText());
fuhao = "*";
textField1.setText(textField.getText() + fuhao);
textField.setText("");
string = "";
});
buttonChu.addActionListener(e -> {
a = Double.parseDouble(textField.getText());
fuhao = "/";
textField1.setText(textField.getText() + fuhao);
textField.setText("");
string = "";
});
buttonDeng.addActionListener(e -> {
string = "";
b = Double.parseDouble(textField.getText());//记录第二个操作数
textField1.setText(textField1.getText() + textField.getText() + "=");//显示完整运算式
//下面是对应符号的运算操作
switch (fuhao) {
case "+": {
Double result = a + b;
textField.setText(Double.toString(result));
break;
}
case "-": {
Double result = a - b;
textField.setText(Double.toString(result));
break;
}
case "*": {
Double result = a * b;
textField.setText(Double.toString(result));
break;
}
case "/": {
Double result = a / b;
textField.setText(Double.toString(result));
break;
}
}
});
frame.add(panel2);//面板添加到窗口
}
}
#我想要达到的结果
