最新版本，利用遞歸下降法的計算器實現(xiàn)運算優(yōu)先級

最近初學gui設計，一時心血來潮，制作了這個簡陋版計算器

我并沒有花很多時間去制作，計算器的功能很少，但是以后一定會盡力去完善

如有不善的地方請多多指教

以下是程序代碼：

package kl1;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.IOException;

import javax.swing.*;

import java.awt.*;

import java.lang.*;

public class jisuanqi extends JFrame{

private JButton button1=new JButton("*");

private JButton button2=new JButton("/");

private JButton button3=new JButton("+");

private JButton button4=new JButton("-");

private JButton button5=new JButton("%");

private JButton button6=new JButton("開方");

private JButton button7=new JButton("開方");

private JButton button8=new JButton("求冪");

? ? private JTextField textField1=new JTextField();

? ? private JTextField textField2=new JTextField();

? ? private JTextField textField3=new JTextField();

? ? TextField textField = new TextField();

? ? public jisuanqi() {

? ?

? ? setTitle("簡陋計算器");

? ? setSize(700,250);

? ? setLocation(400,400);

? ? setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

? ? setLayout(null);

? ? textField1.setBounds(20,60,100,40);

? ? textField2.setBounds(150,60,100,40);

? ? textField3.setBounds(275,60,100,40);

? ? add(textField1);

? ? add(textField2);

? ? add(textField3);

? ? button1.setLocation(400,50);

? ? button2.setLocation(500,50);

? ? button3.setLocation(400,80);

? ? button4.setLocation(500,80);

? ? button5.setLocation(450,110);

? ? button6.setLocation(20,40);

? ? button7.setLocation(150,40);

? ? button8.setLocation(110,100);

? ? button1.setSize(100,20);

? ? button2.setSize(100,20);

? ? button3.setSize(100,20);

? ? button4.setSize(100,20);

? ? button5.setSize(100,20);

? ? button6.setSize(70,20);

? ? button7.setSize(70,20);

? ? button8.setSize(70,20);

? ? add(button1);

? ? add(button2);

? ? add(button3);

? ? add(button4);

? ? add(button5);

? ? add(button6);

? ? add(button7);

? ? add(button8);

? ? JLabel label = new JLabel(new ImageIcon("D:\\圖片\\abcd.jpg"));//修改地址來更換程序里的圖片 //

? ? label.setBounds(0,0, 700, 250);

? ? add(label);

? ? button1.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ? double num1 = Double.parseDouble(textField1.getText());

? ? ? ? double num2 = Double.parseDouble(textField2.getText());

? ? ? ? double t1=num1*num2;

? ? ? ? textField3.setText(Double.toString(t1));

? ? ? ? JOptionPane.showMessageDialog(null, "積為："+t1);

? ? ? ? }

? ? ? ? });

? ? button2.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ?

? ? ? ? double num1 = Double.parseDouble(textField1.getText());

? ? ? ? double num2 = Double.parseDouble(textField2.getText());

? ? ? ? double t2=num1/num2;

? ? ? ? textField3.setText(Double.toString(t2));

? ? ? ? JOptionPane.showMessageDialog(null, "商為："+t2);

? ? ? ? }

? ? ? ? });

? ? button3.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ? double num1 = Double.parseDouble(textField1.getText());

? ? ? ? double num2 = Double.parseDouble(textField2.getText());

? ? ? ? double t3=num1+num2;

? ? ? ? textField3.setText(Double.toString(t3));

? ? ? ? JOptionPane.showMessageDialog(null, "和為："+t3);

? ? ? ? }

? ? ? ? });

? ? button4.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ? double num1 = Double.parseDouble(textField1.getText());

? ? ? ? double num2 = Double.parseDouble(textField2.getText());

? ? ? ? double t4=num1-num2;

? ? ? ? textField3.setText(Double.toString(t4));

? ? ? ? JOptionPane.showMessageDialog(null, "差為："+t4);

? ? ? ? }

? ? ? ? });

? ? button5.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ? double num1 = Double.parseDouble(textField1.getText());

? ? ? ? double num2 = Double.parseDouble(textField2.getText());

? ? ? ? double t5=num1%num2;

? ? ? ? textField3.setText(Double.toString(t5));

? ? ? ? JOptionPane.showMessageDialog(null, "余數(shù)為："+t5);

? ? ? ? }

? ? ? ? });

? ? button6.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ? double num1 = Double.parseDouble(textField1.getText());

? ? ? ? double t6=Math.sqrt(num1);

? ? ? ? textField3.setText(Double.toString(t6));

? ? ? ? JOptionPane.showMessageDialog(null, num1+"開根號為："+t6);

? ? ? ? }

? ? ? ? });

? ? button7.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ? double num2 = Double.parseDouble(textField2.getText());

? ? ? ? double t7=Math.sqrt(num2);

? ? ? ? textField3.setText(Double.toString(t7));

? ? ? ? JOptionPane.showMessageDialog(null, num2+"開根號為："+t7);

? ? ? ? }

? ? ? ? });

? ? button8.addActionListener(new ActionListener(){

? ? ? ? public void actionPerformed(ActionEvent event) {

? ? ? ? double num1 = Double.parseDouble(textField1.getText());

? ? ? ? double num2 = Double.parseDouble(textField2.getText());

? ? ? ? double t7=Math.pow(num1, num2);

? ? ? ? textField3.setText(Double.toString(t7));

? ? ? ? JOptionPane.showMessageDialog(null, num1+"的"+num2+"次冪是"+t7);

? ? ? ? }

? ? ? ? });

? ??

? ? ? ? }

public static void main(String[] args) throws IOException{

// TODO Auto-generated method stub

? ? ? ? jisuanqi frame=new jisuanqi();

? ? ? ? frame.setVisible(true);

? ? ??

}

}

就這些啦！