简单计算器用swing界面设计

shenyuan 发表于 2020-7-25 10:37

package swing;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Event;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.List;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.peer.ButtonPeer;
import java.util.ArrayList;
import java.util.Set;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;

/**
* @title
* @AuThor
* @date 2020年6月26日上午10:45:39
*/
@SuppressWarnings({ "serial", "unused" })
public class Calculator extends JFrame {

private JPanel contentPane;

/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Calculator frame = new Calculator();
frame.setVisible(true);

} catch (Exception e) {
e.printStackTrace();
}
}
});

}

/**
* Create the frame.
*/
public Calculator() {
setTitle("计算器");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 220, 240);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(0, 0, 0, 0));
contentPane.setLayout(new BorderLayout(0,0));
setContentPane(contentPane);

JPanel displayPanel = new JPanel();
contentPane.add(displayPanel,BorderLayout.NORTH);

JTextField display = new JTextField();//创建文本框对象上面输出框
display.setToolTipText("0");
display.setHorizontalAlignment(SwingConstants.RIGHT);//设置文本框中的文本内容的对齐有式为右对齐
display.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String a = display.getText();
int a1 = Integer.valueOf(display.getText());
int a2 = Integer.valueOf(display.getText());
int sum = a1 + a2;

String summ = sum+"";
// display.setText(summ);
// sum.setText(Integer.parseInt(display.getText())+Integer.parseInt(display.getText())+"");
}
});

display.setEditable(false);//设置文本框不可编辑
display.setFont(new Font("微软雅黑",Font.PLAIN,15));//设置文本框中的字体样式
displayPanel.add(display);//将文本框添加到displayPanel面板中
display.setColumns(13);//设置文本框的长度

JPanel buttonPanel = new JPanel();
contentPane.add(buttonPanel,BorderLayout.CENTER);
buttonPanel.setLayout(new GridLayout(4,4,5,5));

JButton number7Button = new JButton("7");//数字7
number7Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number7Button);
number7Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String seven = number7Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(seven);//输出框显示按钮数字
int seven1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton number8Button = new JButton("8");//数字8
number8Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number8Button);
number8Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String eight = number8Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(eight);//输出框显示按钮数字
int eight1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton number9Button = new JButton("9");//数字9
number9Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number9Button);
number9Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String nine = number9Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(nine);//输出框显示按钮数字
int nine1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton divideButton = new JButton("/");//除法
divideButton.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(divideButton);

JButton number4Button = new JButton("4");//数字4
number4Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number4Button);
number4Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String four = number4Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(four);//输出框显示按钮数字
int four1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});
JButton number5Button = new JButton("5");//数字5
number5Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number5Button);
number5Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String fiv = number5Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(fiv);//输出框显示按钮数字
int fiv1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});
JButton number6Button = new JButton("6");//数字6
number6Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number6Button);
number6Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String six = number6Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(six);//输出框显示按钮数字
int six1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton multiplyButton = new JButton("*");//乘法
multiplyButton.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(multiplyButton);

JButton number3Button = new JButton("1");//数字1
number3Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number3Button);
number3Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String one = number3Button.getText();
display.setText(one);//输出框显示按钮数字
int one1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton number2Button = new JButton("2");//数字2
number2Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number2Button);
number2Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String two = number2Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(two);//输出框显示按钮数字
int two1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton number1Button = new JButton("3");//数字3
number1Button.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(number1Button);
number1Button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String third = number1Button.getText();//获取按钮的text，然后赋值给textfield
display.setText(third);//输出框显示按钮数字
int third1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton subtractButton = new JButton("-");//减法
subtractButton.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(subtractButton);

JButton numberButton = new JButton("0");//数字0
numberButton.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(numberButton);
numberButton.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String zero = numberButton.getText();//获取按钮的text，然后赋值给textfield
display.setText(zero);//输出框显示按钮数字
int zero1 = Integer.valueOf(display.getText());//转换成int类型进行运算
}
});

JButton dotButton = new JButton(".");//小数点
dotButton.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(dotButton);

JButton equalButton = new JButton("=");//等于（结算）
equalButton.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(equalButton);
equalButton.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String a = display.getText();
int a1 = Integer.valueOf(display.getText());
int a2 = Integer.valueOf(display.getText());
if (display.getText() == "0") {

}
// int a2 = Integer.valueOf(display.getText());
int sum = a1 + a2;

String summ = sum+"";
display.setText(summ);
}
});

JButton addButton = new JButton("+");//加法
addButton.setFont(new Font("微软雅黑",Font.PLAIN,15));
buttonPanel.add(addButton);
addButton.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (addButton.equals(e.getSource())) {
int zero = 0;
display.setText(zero+"");

}
}
});
}

}

leading2rome 发表于 2020-7-26 17:03

swing应该过时了吧，远古猛兽{:1_908:}

liujieboss 发表于 2020-7-25 22:17

有空自己写一个，先看看学习一下

djr1017 发表于 2020-7-26 13:27

学习一下

shenyuan 发表于 2020-7-31 09:54

leading2rome 发表于 2020-7-26 17:03
swing应该过时了吧，远古猛兽

应该是的吧，我还刚刚入门{:1_924:}

褚褚先生 发表于 2020-9-28 10:35

woc,我最近也在学习swing，不过都说过时了，我转js了，还是写网页吧。

c03xp 发表于 2020-9-28 11:03

慎用微软雅黑

shenyuan 发表于 2020-9-28 22:58

褚褚先生发表于 2020-9-28 10:35
woc,我最近也在学习swing，不过都说过时了，我转js了，还是写网页吧。

js学完了我准备jsp了

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简单计算器用swing界面设计