gui 设计的简单计算器 java_Java实现GUI计算器(完整版)
时间: 2023-12-02 20:02:50 浏览: 30
好的,我可以为您提供Java实现GUI计算器的示例代码。以下是一个完整版的示例代码:
```java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator implements ActionListener {
JFrame frame;
JTextField textField;
JButton[] numberButtons = new JButton[10];
JButton[] functionButtons = new JButton[9];
JButton addButton, subButton, mulButton, divButton;
JButton decButton, equButton, delButton, clrButton, negButton;
JPanel panel;
Font myFont = new Font("Ink Free", Font.BOLD, 30);
double num1 = 0, num2 = 0, result = 0;
char operator;
Calculator() {
frame = new JFrame("Calculator");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(420, 550);
frame.setLayout(null);
textField = new JTextField();
textField.setBounds(50, 25, 300, 50);
textField.setFont(myFont);
textField.setEditable(false);
addButton = new JButton("+");
subButton = new JButton("-");
mulButton = new JButton("*");
divButton = new JButton("/");
decButton = new JButton(".");
equButton = new JButton("=");
delButton = new JButton("Del");
clrButton = new JButton("Clr");
negButton = new JButton("(-)");
functionButtons[0] = addButton;
functionButtons[1] = subButton;
functionButtons[2] = mulButton;
functionButtons[3] = divButton;
functionButtons[4] = decButton;
functionButtons[5] = equButton;
functionButtons[6] = delButton;
functionButtons[7] = clrButton;
functionButtons[8] = negButton;
for(int i = 0; i < 9; i++) {
functionButtons[i].addActionListener(this);
functionButtons[i].setFont(myFont);
functionButtons[i].setFocusable(false);
}
for(int i = 0; i < 10; i++) {
numberButtons[i] = new JButton(String.valueOf(i));
numberButtons[i].addActionListener(this);
numberButtons[i].setFont(myFont);
numberButtons[i].setFocusable(false);
}
negButton.setBounds(50, 430, 100, 50);
delButton.setBounds(150, 430, 100, 50);
clrButton.setBounds(250, 430, 100, 50);
panel = new JPanel();
panel.setBounds(50, 100, 300, 300);
panel.setLayout(new GridLayout(4, 4, 10, 10));
panel.setBackground(Color.gray);
panel.add(numberButtons[1]);
panel.add(numberButtons[2]);
panel.add(numberButtons[3]);
panel.add(addButton);
panel.add(numberButtons[4]);
panel.add(numberButtons[5]);
panel.add(numberButtons[6]);
panel.add(subButton);
panel.add(numberButtons[7]);
panel.add(numberButtons[8]);
panel.add(numberButtons[9]);
panel.add(mulButton);
panel.add(decButton);
panel.add(numberButtons[0]);
panel.add(equButton);
panel.add(divButton);
frame.add(panel);
frame.add(negButton);
frame.add(delButton);
frame.add(clrButton);
frame.add(textField);
frame.setVisible(true);
}
public static void main(String[] args) {
Calculator calc = new Calculator();
}
@Override
public void actionPerformed(ActionEvent e) {
for(int i = 0; i < 10; i++) {
if(e.getSource() == numberButtons[i]) {
textField.setText(textField.getText().concat(String.valueOf(i)));
}
}
if(e.getSource() == decButton) {
textField.setText(textField.getText().concat("."));
}
if(e.getSource() == addButton) {
num1 = Double.parseDouble(textField.getText());
operator = '+';
textField.setText("");
}
if(e.getSource() == subButton) {
num1 = Double.parseDouble(textField.getText());
operator = '-';
textField.setText("");
}
if(e.getSource() == mulButton) {
num1 = Double.parseDouble(textField.getText());
operator = '*';
textField.setText("");
}
if(e.getSource() == divButton) {
num1 = Double.parseDouble(textField.getText());
operator = '/';
textField.setText("");
}
if(e.getSource() == equButton) {
num2 = Double.parseDouble(textField.getText());
switch(operator) {
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case '*':
result = num1 * num2;
break;
case '/':
result = num1 / num2;
break;
}
textField.setText(String.valueOf(result));
num1 = result;
}
if(e.getSource() == clrButton) {
textField.setText("");
}
if(e.getSource() == delButton) {
String string = textField.getText();
textField.setText("");
for(int i = 0; i < string.length() - 1; i++) {
textField.setText(textField.getText() + string.charAt(i));
}
}
if(e.getSource() == negButton) {
double temp = Double.parseDouble(textField.getText());
temp *= -1;
textField.setText(String.valueOf(temp));
}
}
}
```
这个GUI计算器具有基本的加减乘除和小数点功能,以及删除、清除和取负操作。您可以根据需要进行修改和扩展。