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java图形界面之电子算盘

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Java图形用户界面院系：计算机系姓名:后人好乘凉一实验目的●使学生综合运用图形用户界面设计的概念；●使学生熟悉使用中间面板，组成层次复杂的GUI界面；●使学生掌握使用事件驱动编程；二实验环境及实验准备●所需硬件环境为微机；●所需软件环境为JDK、Eclipse；●掌握Java下界面容器与基本组件的基本知识与应用；●掌握Java下事件处理模型；●掌握Java下图形绘制的方法；三实验内容（一）、设计实现电子算盘，并完成测试；[题目描述及要求] 给小朋友设计一个电子算盘。

要求绘制电子算盘界面，设计并实现打珠算过程（界面参考如下图示）。

电子算盘参考界面示意程序源代码：package calculator;import java.awt.Color; //导入import java.awt.GridLayout;import java.awt.Container;import javax.swing.JLabel;import javax.swing.JButton;import javax.swing.ImageIcon;import javax.swing.JPanel;import javax.swing.JFrame;import javax.swing.JTextField;import java.awt.event.*;public class Calculator extends JFrame{public int totalNumber;public int t = 0;public boolean[] isAddFive = new boolean[5];public int number[] = new int[5];public ImageIcon picture = newImageIcon(System.getProperty("user.dir") + "/算珠.jpg" ); //添加图片public ImageIcon picture1 = newImageIcon(System.getProperty("user.dir") + "/算珠1.jpg" );Container con = getContentPane();JPanel j1 = new JPanel();JPanel j2 = new JPanel();JPanel j3 = new JPanel();JPanel time=new JPanel();JLabel q = new JLabel();JLabel nA = new JLabel();JLabel Time=new JLabel(new ImageIcon("./时钟.jpg")); //添加时钟标签的图片JTextField a = new JTextField();JButton Buttons_1[][] = new JButton[2][5];JButton Buttons_2[][] = new JButton[5][5];GridLayout gl_1 = new GridLayout(2,5);GridLayout gl_2 = new GridLayout(5,5);GridLayout gl_3 =new GridLayout();public Calculator(){super("电子算盘");setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setBounds(100,100,600,400);setVisible(true);setLayout(null);AbacusPanel();}public void AbacusPanel() // 算盘面板{j1.setLayout(null);j1.setBounds(15,60,400,300);j1.setBackground(Color.blue);con.add(j1);JPanel j2 = new JPanel();j2.setLayout(gl_1);j2.setBounds(10, 10, 380, 80);j1.add(j2);JPanel j3 = new JPanel();j3.setLayout(gl_2);j3.setBounds(10, 100, 380, 190);j1.add(j3);time.setLayout(gl_3);time.setBounds(430,220,130,130); //时钟面板大小time.setBackground(Color.white); //时钟面板颜色time.add(Time);//添加时钟标签con.add(time);for(int i = 0;i < 2;i++){for(int j = 0;j < 5;j++){Buttons_1[i][j] = new JButton("");Buttons_1[i][j].addActionListener(new ClickIt());Buttons_1[i][j].setBorderPainted(false);Buttons_1[i][j].setContentAreaFilled(false);if(i != 1)Buttons_1[i][j].setIcon(picture1);j2.add(Buttons_1[i][j]);}}for(int i = 0;i < 5;i++){for(int j = 0;j < 5;j++){Buttons_2[i][j] = new JButton("");Buttons_2[i][j].addActionListener(new ClickIt());Buttons_2[i][j].setBorderPainted(false);Buttons_2[i][j].setContentAreaFilled(false);if(i != 0)Buttons_2[i][j].setIcon(picture);j3.add(Buttons_2[i][j]);}}}private void addTotalNumber() // 计算算盘的结果{for(int j = 0;j < 5;j++){if(isAddFive[j] == true && number[j] <5)number[j] = number[j] + 5;elseif(isAddFive[j] == false && number[j] >= 5)number[j] = number[j] - 5;}totalNumber = 0;for(int j = 0;j < 5;j++){totalNumber = totalNumber + number[j] *(int)Math.pow(10,(double)j);}System.out.println(totalNumber);}private void DrawCol(int j) // 绘制j列算珠{for(int i = 1; i <=4;i++){B uttons_2[i][j].setIcon(picture);}}class ClickIt implements ActionListener // 单击事件监听器 {public void actionPerformed(ActionEvent e){for(int i = 0;i < 2;i++)for(int j = 0;j < 5;j++)if(e.getSource() == Buttons_1[i][j]){if(i == 1){isAddFive[5-j-1] = false;Buttons_1[0][j].setIcon(picture1);Buttons_1[1][j].setIcon(null);}elseif(i == 0){isAddFive[5-j-1] = true;Buttons_1[1][j].setIcon(picture1);Buttons_1[0][j].setIcon(null); }}for(int i = 0;i <= 4;i++) // 点击后动作for(int j = 0;j < 5;j++)if(e.getSource() == Buttons_2[i][j]){number[5-j-1] = i;DrawCol(j);Buttons_2[0][j].setIcon(picture);Buttons_2[i][j].setIcon(null);}addTotalNumber();}}public static void main(String[] args) {// TODO Auto-generated method stubCalculator f = new Calculator();}}运行结果截图程序流程图开始添加框架添加面板j1、j2、j3实现算盘分块添加时钟Label,并添加图片按面板j2、j3上划分好的网格结构添加按钮及图片。

添加单击事件监听器及单击后动作输出电子算盘结束（二）、以（一）中的电子算盘为基础，设计并实现珠算测试器，并完成测试。

[题目描述及要求]给小朋友设计一个珠算测试器，要求能够完成珠算加减法的测试。

具体的要求功能如下：(1) 用户启动测试，输入用户名后系统随机生成特定数目的加减法测试题；(2) 要求测试使用表盘式或数字时秒表进行界面计时显示（参考如上图示）；(3) 对于每道测试题目，要求用户使用电子算盘完成珠算过程，当按下确认键时，将珠算结果与正确答案比对，并在界面上显示总题数、已答题数和已做对题数；(4) 当测试完成，界面显示本次测试情况（包括用户名、测试题目及答题明细、对错情况、测试用时和测试成绩）程序源代码package testcal;import java.awt.Color; //导入import java.awt.Font;import java.awt.GridLayout;import java.awt.Container;import javax.swing.JLabel;import javax.swing.JButton;import javax.swing.ImageIcon;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JFrame;import javax.swing.JTextField;import java.awt.event.*;import java.util.Timer;import java.util.TimerTask;public class extends JFrame {public int totalNumber;public int answer;public boolean isAnswer = true;public int t = 0;public int answeredQuestion = 0;public int rightA_Number = 0;public int question_Number;public boolean[] isAddFive = new boolean[5];///4-5public int number[] = new int[5];///4-5public ImageIcon picture = newImageIcon(System.getProperty("user.dir") + "/算珠.jpg" ); //添加图片public ImageIcon picture1 = newImageIcon(System.getProperty("user.dir") + "/算珠1.jpg" );Container con = getContentPane();JPanel j1 = new JPanel();//添加面板JPanel j2 = new JPanel();JPanel j3 = new JPanel();JPanel time=new JPanel();JLabel q = new JLabel();JLabel nA = new JLabel();JLabel nB = new JLabel();JLabel n = new JLabel();JLabel b = new JLabel();JLabel s = new JLabel();JLabel sN = new JLabel();JLabel tM = new JLabel();JLabel Time=new JLabel(new ImageIcon("./时钟.jpg")); //添加时钟标签的图片JTextField userName = new JTextField(); //添加文本JTextField sNumber = new JTextField();JButton beginAnswer = new JButton("开始"); //添加按钮JButton oK = new JButton("确定");JButton nQ = new JButton("下一题");JTextField a = new JTextField();JButton Buttons_1[][] = new JButton[2][5]; //算盘上部JButton Buttons_2[][] = new JButton[5][5]; //算盘下部GridLayout gl_1 = new GridLayout(2,5); //网格布局GridLayout gl_2 = new GridLayout(5,5);GridLayout gl_3 =new GridLayout();public Testcal(){super("电子算盘");Init();//初始化setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //窗体关闭setBounds(100,100,600,500);//设置大小setVisible(true);//窗体可见setLayout(null);AbacusPanel(); //算盘面板DrawMnue();}Timer timer; // 计时器public void QuestionTimer(){timer = new Timer();timer.schedule(new RunTask(),1000,1000);}class RunTask extends TimerTask{public void run(){t = t + 1;String ss = "";if(t / 60 < 10)ss = ss + "0";ss = ss + Integer.toString(t / 60) + ":";if(t % 60 < 10)ss = ss + "0";ss = ss + Integer.toString(t % 60);tM.setText("计时： " + ss);}}public void AbacusPanel() // 算盘面板{j1.setLayout(null);j1.setBounds(15,160,400,300); //面板大小j1.setBackground(Color.blue); //面板颜色con.add(j1);//添加面板JPanel j2 = new JPanel(); //面板叠加间距成为边框j2.setLayout(gl_1);j2.setBounds(10, 10, 380, 80);j1.add(j2);JPanel j3 = new JPanel();j3.setLayout(gl_2);j3.setBounds(10, 100, 380, 190);j1.add(j3);time.setLayout(gl_3);time.setBounds(430,320,130,130); //时钟面板大小time.setBackground(Color.white); //时钟面板颜色time.add(Time);//添加时钟标签con.add(time);for(int i = 0;i < 2;i++){for(int j = 0;j < 5;j++){Buttons_1[i][j] = new JButton("");Buttons_1[i][j].addActionListener(new ClickIt());Buttons_1[i][j].setBorderPainted(false);Buttons_1[i][j].setContentAreaFilled(false);if(i != 1)Buttons_1[i][j].setIcon(picture1);j2.add(Buttons_1[i][j]);}}for(int i = 0;i < 5;i++){for(int j = 0;j < 5;j++){Buttons_2[i][j] = new JButton("");Buttons_2[i][j].addActionListener(new ClickIt());Buttons_2[i][j].setBorderPainted(false);Buttons_2[i][j].setContentAreaFilled(false);if(i != 0)Buttons_2[i][j].setIcon(picture);j3.add(Buttons_2[i][j]);}}}public void DrawMnue()//编辑选项{Font f1 = new Font("",Font.BOLD,30);Font f2 = new Font("",Font.BOLD,14);Font f3 = new Font("",Font.PLAIN,18);q.setBounds(20, 50, 280, 40);q.setFont(f1);con.add(q);a.setFont(f1);a.setBounds(270,50,80,40);a.setVisible(false);con.add(a);oK.setFont(f2);oK.setBounds(350, 50, 65, 40);oK.addActionListener(new ClickOk());oK.setVisible(false);con.add(oK);nA.setText("");nA.setBounds(20,100,300,40);nA.setFont(f1);con.add(nA);nQ.setFont(f2);nQ.setBounds(420, 50, 80, 40);nQ.addActionListener(new ClickNext());nQ.setVisible(false);con.add(nQ);nB.setText("已做对题数：" + rightA_Number); //已对题目nB.setFont(f3);nB.setForeground(Color.green);nB.setBounds(430, 150, 140, 40);con.add(nB);n.setText("已答题数：" + answeredQuestion); //已答题目n.setFont(f3);n.setForeground(Color.red);n.setBounds(430, 190, 140, 40);con.add(n);sN.setText("总题数：" + question_Number);//总题数sN.setFont(f3);sN.setBounds(430, 240, 140, 40);con.add(sN);b.setText("用户名："); //用户名b.setFont(f3);b.setBounds(20, 0, 80, 40);con.add(b);userName.setText("");userName.setFont(f3);userName.setBounds(100, 10, 60, 30);userName.setHorizontalAlignment(0);con.add(userName);s.setText("设置题目总数：");//设置题目总数s.setFont(f3);s.setBounds(180,0,130,40);con.add(s);sNumber.setText("");sNumber.setFont(f3);sNumber.setBounds(300, 10, 60, 30);sNumber.setHorizontalAlignment(0);con.add(sNumber);beginAnswer.setFont(new Font("",Font.PLAIN,12));beginAnswer.setBounds(400, 5, 85,30);beginAnswer.addActionListener(new ClickLogin());con.add(beginAnswer);tM.setText("计时： 00:00"); //计时tM.setFont(f3);tM.setBounds(430, 280, 200, 40);con.add(tM);}private void Question() // 生成题目{int i1 = 1 + (int)(Math.random()*9999); //随机数范围9999-99999int i2 = 1 + (int)(Math.random()*9999);int number1 = Math.max(i1, i2);int number2 = Math.min(i1, i2);int m = (int)(Math.random()*2);if(m == 0){while(i1 + i2 > 10000) //随机数之和大于10000{i1 = 1 + (int)(Math.random()*99999);i2 = 1 + (int)(Math.random()*99999);}q.setText(Integer.toString(i1) + " + "+ Integer.toString(i2)+ " = ");answer = i1 + i2;}else{q.setText(Integer.toString(number1) + " - " +Integer.toString(number2) + " = ");answer = number1 - number2;}}private void addTotalNumber()// 计算算盘的结果{for(int j = 0;j < 5;j++){if(isAddFive[j] == true && number[j] < 5) //1-4number[j] = number[j] + 5;elseif(isAddFive[j] == false && number[j] >= 5) //5-9number[j] = number[j] - 5;}totalNumber = 0;for(int j = 0;j < 5;j++){totalNumber = totalNumber + number[j] *(int)Math.pow(10,(double)j);}System.out.println(totalNumber);}private void Init() // 初始化数据{totalNumber = 0;for(int j = 0;j < 5;j++) {number[j] = 0;isAddFive[j] = false;}}private void DrawCol(int j) // 绘制j列算珠{for(int i = 1; i <=4;i++) //1-5{B uttons_2[i][j].setIcon(picture);}}class ClickIt implements ActionListener //单击事件监听器{public void actionPerformed(ActionEvent e){for(int i = 0;i < 2;i++)for(int j = 0;j < 5;j++)if(e.getSource() == Buttons_1[i][j]){if(i == 1){isAddFive[5-j-1] = false;Buttons_1[0][j].setIcon(picture1);Buttons_1[1][j].setIcon(null);}elseif(i == 0){isAddFive[5-j-1] = true;Buttons_1[1][j].setIcon(picture1);Buttons_1[0][j].setIcon(null);}}for(int i = 0;i <= 4;i++) // 点击后动作for(int j = 0;j < 5;j++) //1-5if(e.getSource() == Buttons_2[i][j]){number[5-j-1] = i;DrawCol(j);Buttons_2[0][j].setIcon(picture);Buttons_2[i][j].setIcon(null);}addTotalNumber();}}class ClickOk implements ActionListener //答题点击确定后{public void actionPerformed(ActionEvent e){isAnswer = true;timer.cancel();a.setText(Integer.toString(totalNumber));if(totalNumber == answer){oK.setText("正确");oK.setForeground(Color.green);rightA_Number = rightA_Number + 1;}else{oK.setText("错误");oK.setForeground(Color.red);nA.setText("正确答案为： " + Integer.toString(answer));nA.setForeground(Color.green);}answeredQuestion = answeredQuestion + 1;nB.setText("已做对题数：" + rightA_Number);nB.setForeground(Color.green);n.setText("已答题数：" + answeredQuestion);n.setForeground(Color.red);}}class ClickNext implements ActionListener //点击下一题{public void actionPerformed(ActionEvent e){if(isAnswer == true){isAnswer = false;if(nQ.getText() == "完成"){timer.cancel();double x = ((double)rightA_Number / (double)question_Number) * 100;int option = JOptionPane.showConfirmDialog(null , "您的正确率为: " + x + "%\n用时" + t + "秒"+"\n是否重新开始?" , "提示",JOptionPane.YES_NO_OPTION );if(JOptionPane.YES_OPTION == option){userName.setText("");userName.setEditable(true);sNumber.setText("");sNumber.setEditable(true);beginAnswer.setEnabled(true);nQ.setVisible(false);oK.setVisible(false);a.setVisible(false);q.setVisible(false);oK.setText("确定");oK.setForeground(null);a.setText("");nA.setText("");nQ.setText("下一题");Init();rightA_Number = 0;answeredQuestion = 0;t = 0;n.setText("已答题数："+ answeredQuestion); //显示已答题数等信息n.setForeground(Color.green);nB.setText("已做对题数：" + rightA_Number);nB.setForeground(Color.red);sN.setText("总题数：" + 0);sN.setForeground(Color.red);tM.setText("计时：" + 0);}}else{QuestionTimer();Question();oK.setText("确定");oK.setForeground(null);a.setText("");nA.setText("");for(int i = 0;i < 5;i++) // 初始化算盘{DrawCol(i);Buttons_1[1][i].setIcon(null);Buttons_2[0][i].setIcon(null);Buttons_1[0][i].setIcon(picture1);}Init();if(answeredQuestion == question_Number - 1)nQ.setText("完成");}}}}class ClickLogin implements ActionListener //用户名等信息{public void actionPerformed(ActionEvent e){boolean isInt = true;for(int i = 0;i < sNumber.getText().length();i++)if(!Character.isDigit(sNumber.getText().charAt(i)))isInt = false;if(userName.getText().equalsIgnoreCase(""))JOptionPane.showMessageDialog(null, "请输入用户名！");elseif(sNumber.getText().equalsIgnoreCase("") || isInt == false) JOptionPane.showMessageDialog(null, "请输入题目总数 !");else{isAnswer = false;Question();beginAnswer.setEnabled(false);q.setVisible(true);nQ.setVisible(true);oK.setVisible(true);a.setVisible(true);userName.setEditable(false);sNumber.setEditable(false);String xx = sNumber.getText();question_Number = Integer.parseInt(xx);sN.setText("总题数：" + question_Number); QuestionTimer();}}}public static void main(String[] args) {Testcal t = new Testcal();}}程序运行结果截图程序流程图四实验分析及问题思考1、时钟还没能实现，仅使用timer形成了电子钟。

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java图形界面简易计算器

java图形界面简易计算器

java图形界⾯简易计算器界⾯效果：/****/package calculator;import java.awt.BorderLayout;import java.awt.EventQueue;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import java.awt.GridLayout;import javax.swing.JLabel;import java.awt.GridBagLayout;import javax.swing.JTextField;import java.awt.GridBagConstraints;import java.awt.FlowLayout;import javax.swing.SpringLayout;import javax.swing.JButton;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import java.awt.Font;import javax.swing.JSpinner;import javax.swing.JFormattedTextField;import javax.swing.JCheckBox;import javax.swing.JTable;import javax.swing.JProgressBar;import javax.swing.JTextArea;import java.awt.Color;/*** @author Ocean**/public class Calc_Main extends JFrame {private JTextField textField;private JTable table;String s = "";// 显⽰算式long[] num = new long[100];// 储存运算数据char[] b = new char[100];// 储存运算符int i = 0;// 输⼊运算数据和运算符是给数组计数int c;// 计算结果时计数long jieguo = 0;// 计算结果/*** Launch the application.*/public static void main(String[] args) {EventQueue.invokeLater(new Runnable() {public void run() {try {Calc_Main frame = new Calc_Main();frame.setVisible(true);} catch (Exception e) {e.printStackTrace();}}});}/*** 构造⽅法* Create the frame.*/public Calc_Main() {setFont(new Font("Dialog", Font.PLAIN, 12));setTitle("计算器");setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(800, 300, 382, 494);getContentPane().setLayout(null);textField = new JTextField();textField.setForeground(new Color(102, 51, 255));textField.setFont(new Font("宋体", Font.PLAIN, 18)); textField.setBounds(10, 10, 344, 50);getContentPane().add(textField);textField.setColumns(10);JButton btnNewButton = new JButton("C");btnNewButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s="";textField.setText(s);//清空⽂本框for(c=0;c<100;c++){num[c]=0;//清空运算数据b[c]=0;//清空运算符}i=0;c=0;jieguo=0;}});btnNewButton.setBounds(20, 99, 65, 40);getContentPane().add(btnNewButton);JButton button = new JButton("/");button.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {s=s+"/";textField.setText(s);//在⽂本框中显⽰相应运算符b[i]='/';i++; //输⼊运算符号后给数组地址+1存放后⾯的输⼊ }});button.setBounds(107, 99, 65, 40);getContentPane().add(button);JButton button_1 = new JButton("*");button_1.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {s=s+"*";textField.setText(s);//在⽂本框中显⽰相应运算符b[i]='*';i++;}});button_1.setBounds(189, 99, 65, 40);getContentPane().add(button_1);JButton button_2 = new JButton("-");button_2.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {s=s+"-";textField.setText(s);//在⽂本框中显⽰相应运算符b[i]='-';i++;}});button_2.setBounds(276, 99, 65, 40);getContentPane().add(button_2);JButton button_3 = new JButton("1");button_3.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) {s += "1";textField.setText(s);//在⽂本框中显⽰相应数字 num[i] = num[i] * 10 + 1;}});button_3.setBounds(20, 170, 65, 40);getContentPane().add(button_3);JButton button_4 = new JButton("2");button_4.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s += "2";textField.setText(s);//在⽂本框中显⽰相应数字 num[i] = num[i] * 10 + 2;}});button_4.setBounds(107, 170, 65, 40);getContentPane().add(button_4);JButton button_5 = new JButton("3");button_5.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s += "3";textField.setText(s);//在⽂本框中显⽰相应数字 num[i] = num[i] * 10 + 3;}});button_5.setBounds(189, 170, 65, 40);getContentPane().add(button_5);JButton button_6 = new JButton("+");button_6.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s=s+"+";textField.setText(s);//在⽂本框中显⽰相应运算符 b[i]='+';i++;}});button_6.setBounds(276, 170, 65, 116);getContentPane().add(button_6);JButton button_7 = new JButton("4");button_7.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s += "4";textField.setText(s);//在⽂本框中显⽰相应数字 num[i] = num[i] * 10 + 4;}});button_7.setBounds(20, 246, 65, 40);getContentPane().add(button_7);JButton button_8 = new JButton("5");button_8.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s += "5";textField.setText(s);//在⽂本框中显⽰相应数字 num[i] = num[i] * 10 + 5;}});button_8.setBounds(107, 246, 65, 40);getContentPane().add(button_8);JButton button_9 = new JButton("6");button_9.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s += "6";textField.setText(s);//在⽂本框中显⽰相应数字 num[i] = num[i] * 10 + 6;}});button_9.setBounds(189, 246, 65, 40);getContentPane().add(button_9);JButton button_11 = new JButton("7");button_11.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {s += "7";textField.setText(s);//在⽂本框中显⽰相应数字num[i] = num[i] * 10 + 7;}});button_11.setBounds(20, 315, 65, 40);getContentPane().add(button_11);JButton button_12 = new JButton("8");button_12.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {s += "8";textField.setText(s);//在⽂本框中显⽰相应数字num[i] = num[i] * 10 + 8;}});button_12.setBounds(107, 315, 65, 40);getContentPane().add(button_12);JButton button_13 = new JButton("9");button_13.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {s += "9";textField.setText(s);//在⽂本框中显⽰相应数字num[i] = num[i] * 10 + 9;}});button_13.setBounds(189, 315, 65, 40);getContentPane().add(button_13);JButton button_14 = new JButton("=");button_14.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {switch(b[0])//为了⽅便⽤循环来计算，我想到的是先把第⼀次计算提出来 {case '+':{jieguo=num[0]+num[1];break;}case '-':{jieguo=num[0]-num[1];break;}case '*':{jieguo=num[0]*num[1];break;}case '/':{jieguo=num[0]/num[1];break;}}c++;// ⼀个算式多次运算for(c=1;c<i;c++){switch(b[c]){case '+':{jieguo=jieguo+num[c+1];break;}case '-':{jieguo=jieguo-num[c+1];break;}case '*':{jieguo=jieguo*num[c+1];break;}case '/':{jieguo=jieguo/num[c+1];break;}}}textField.setText(String.valueOf(jieguo));//.setText()的参数需要String，所以⽤String.valueOf()将long转换为String }});button_14.setBounds(276, 315, 65, 104);getContentPane().add(button_14);JButton button_15 = new JButton("0");button_15.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {s += "0";textField.setText(s);//在⽂本框中显⽰相应数字num[i] = num[i] * 10 + 0;}});button_15.setBounds(20, 379, 152, 40);getContentPane().add(button_15);JButton button_17 = new JButton(".");button_17.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {//还没想出来怎么整，有知道的⼤佬还请多指教``}});button_17.setBounds(189, 379, 65, 40);getContentPane().add(button_17);JLabel label = new JLabel("注意本计算机没有计算优先级（⼀律从左到右计算）");label.setBounds(22, 430, 321, 15);getContentPane().add(label);}}。

java图形化界面实现简单混合运算计算器的示例代码

java图形化界面实现简单混合运算计算器的示例代码

java图形化界⾯实现简单混合运算计算器的⽰例代码写了好⼏天了终于写完了这个四则运算计算器，总代码放在后⾯截图如下：⾸先是布局都⽐较简单，最上⾯的⼀个框是总的输出框，第⼆个框是每次输⼊的数字显⽰在框内，对于每⼀个按钮都增加监听器，对于数字按钮：当长度⼤于8的或者等号已经出现之后就不再处理按钮事件if(e.getSource().equals(button1)) {s=numberText.getText();//数字长度⼤于8或者等号已出现if(s.length()>8 || equalbook == 1) {}else if(s.equals("0") || s.equals("")) {numberText.setText("1");}else {numberText.setText(s + "1");}}其余的按钮都差不多。

当按钮为⼩数点时，长度⼤于7就不再处理，因为总的长度不能超过8，⽽⼩数点后⾯还要与数字，同时标记⼩数点已经出现过，因为⼀个数中最多出现⼀个⼩数点//当按钮为⼩数点时if(e.getSource().equals(buttonpoint)) {s=numberText.getText();if(s.length()>7 || equalbook == 1) {}if(pointbook==0) {numberText.setText(s + ".");pointbook = 1;}}当按钮为加号时：当数字输⼊框为空时不做处理也有可能是最后⼀位是⼩数点，当然也不处理当最上⽅的输出框的最后⼀位是右括号的时候，可以⽤加号//当按钮为加号时if(e.getSource().equals(buttonadd)) {s=numberText.getText();char ch1[] = s.toCharArray();int length1 = s.length() - 1;String S = expressText.getText();char ch2[] = S.toCharArray();int length2 = S.length() - 1;//当数字为空或为0或数字的最后⼀位是⼩数点时不作处理if((length2 == -1 ||ch2[length2] != ')') && (s.equals("0") || s.equals("") || ch1[length1] == '.')) {}else {numberText.setText("");expressText.setText(expressText.getText() + s + "+");}}+， -， *， /都差不多当前⾯是运算符或者左括号的时候才能⽤左括号，注意当框内⽆元素的时候也可以加左括号，但是需要判断元素的个数是否⼤于0if(e.getSource().equals(buttonleft)) {if(!numberText.getText().equals("0") && !numberText.getText().contentEquals("")) {expressText.setText(expressText.getText() + numberText.getText());}s=expressText.getText();char ch[] = s.toCharArray();int length = s.length() - 1;/** 当前⾯是运算符或者左括号的时候才能⽤左括号* 注意当框内⽆元素的时候也可以加左括号* 但是需要判断元素的个数是否⼤于0*/if(length == -1 || ch[length] == '+' || ch[length] == '-' ||ch[length] == '*' || ch[length] == '/' ||ch[length] == '(' || s.equals("")) {expressText.setText(expressText.getText() + '(');leftNum++;}}右括号就不⼀样if(e.getSource().equals(buttonright)) {if(!numberText.getText().equals("0")) {expressText.setText(expressText.getText() + numberText.getText());numberText.setText("");}s=expressText.getText();char ch[] = s.toCharArray();int length = s.length() - 1;/** 只有前⾯是数字的时候且左括* 号的数量⼤于右括号的数量的时候才能加右括号*/if(Character.isDigit(ch[length]) && leftNum > rightNum) {rightNum++;expressText.setText(expressText.getText() + ')');}}当按钮为 C时，清除所有内容并更新等号状态, 左括号数量, 右括号数量, ⼩数点状态，当⼀次计算完成之后，只有按C按钮才能进⾏新的计算。

java swing实现简易计算器

java swing实现简易计算器

简易计算器【案例介绍】1.案例描述本案例要求利用Java Swing 图形组件开发一个可以进行简单的四则运算的图形化计算器。

2.运行结果运行结果【案例目标】●学会分析“简易计算器”程序实现的逻辑思路。

●能够独立完成“简易计算器”程序的源代码编写、编译及运行。

●掌握Java Swing界面编程的应用。

●了解计算器逻辑运算实现。

【案例分析】要制作一个计算器，首先要知道它由哪些部分组成，如下图所示：一个简单的图形化界面计算器，需要由界面组件、组件的时间监听器和具体的事件处理逻辑组成。

实现一个简易图形化界面计算器可分以下几个步骤：1.UI组件创建和初始化：包括窗体的创建，显示计算结果文本框、清除按钮、数字按钮、运算符等按钮的初始化。

2.在窗体中添加UI组件：包括放置数字键及运算符面板、放置清除框面板。

3.布局结束之后，就是计算器的难点：编写事件处理程序。

4.按键的响应实现。

5.计算逻辑的实现。

6.注册监听器【案例实现】Calculator.java1 package chapter1102;2 import java.awt.*;3 import java.awt.event.*;4 import javax.swing.*;5 import java.util.Vector;6 import java.math.BigDecimal;7 public class Calculator {8 // 操作数1，为了程序的安全，初值一定设置，这里我们设置为0。

9 String str1 = "0";10 // 操作数211 String str2 = "0";12 // 运算符13 String signal = "+";14 // 运算结果15 String result = "";16 // 以下k1至k5为状态开关17 // 开关1用于选择输入方向，将要写入str1或str218 // 为 1 时写入 str1，为 2 时写入 str219 int k1 = 1;20 // 开关 2 用于记录符号键的次数21 // 如果 k2>1 说明进行的是 2+3-9+8 这样的多符号运算22 int k2 = 1;23 // 开关3用于标识 str1 是否可以被清 024 // 等于 1 时可以，不等于1时不能被清025 int k3 = 1;26 // 开关4用于标识 str2 是否可以被清 027 // 等于 1 时可以，不等于1时不能被清028 int k4 = 1;29 // 开关5用于控制小数点可否被录入30 // 等于1时可以，不为1时，输入的小数点被丢掉31 int k5 = 1;32 // store的作用类似于寄存器，用于记录是否连续按下符号键33 JButton store;34 //vt 存储之前输入的运算符。

java图形化界面实现简单计算器

java图形化界面实现简单计算器

java图形化界面实现简单计算器package computer;import java.awt.BorderLayout;public class Compuer extends JFrame {private JPanel contentPane;private JTextField textField;private JTextField textField_1;private JTextField textField_2;private JTextField textField_3;/*** Launch the application.*/public static void main(String[] args) {EventQueue.invokeLater(new Runnable() {public void run() {//运行程序时，点击按钮输入公式，当点击等于号时显示出计算结果try {Compuer frame = new Compuer();frame.setVisible(true);Time time=new Time();time.setTime(frame.textField_3);Thread thread=new Thread(time);thread.start();}catch (Exception e) {e.printStackTrace();}}});}/*** Create the frame.*/public Compuer() {setTitle("\u8BA1\u7B97\u5668");setName("");final StringBuffer s=new StringBuffer();setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setBounds(100, 100, 412, 448);contentPane = new JPanel();contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));setContentPane(contentPane);contentPane.setLayout(null);textField = new JTextField();textField.setEnabled(false);textField.setLocale(/doc/9518291727. html,);textField.setForeground(Color.PINK);textField.setText("\u6B22\u8FCE\u4F7F\u7528\u8BA1\u7B97\u5668");textField.setBounds(10, 20, 368, 30);contentPane.add(textField);textField.setColumns(10);textField_1 = new JTextField();//文本框textField_1，显示公式textField_1.setBounds(10, 102, 368, 30);contentPane.add(textField_1);textField_1.setColumns(10);textField_2= new JTextField();//文本框textField_2.显示计算结果textField_2.setBounds(10, 142, 368, 30);contentPane.add(textField_2);textField_2.setColumns(10);textField_3 = new JTextField();//文本框textField_3，显示电子表textField_3.setForeground(new Color(205, 133, 63));textField_3.setBounds(10, 60, 368, 30);contentPane.add(textField_3);textField_3.setColumns(10);//按钮'清零',监听到按钮后清零JButton btnC = new JButton("\u6E05\u96F6");btnC.setForeground(Color.RED);btnC.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {textField_1.setT ext("");textField_2.setT ext("");s.delete(0, s.length());}});btnC.setBounds(10, 182, 183, 44);contentPane.add(btnC);//按钮'退格',监听到按钮后退格JButton button_16 = new JButton("\u9000\u683C");button_16.setForeground(Color.RED);button_16.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.delete(s.length()-1, s.length());String str=s.toString();textField_1.setT ext(str);}button_16.setBounds(193, 182, 185, 44); contentPane.add(button_16);//按钮'*',监听到按钮后显示*JButton button_1 = new JButton("*");button_1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.append('*');String str=s.toString();textField_1.setT ext(str);}});button_1.setBounds(285, 271, 93, 44);contentPane.add(button_1);//按钮'6',监听到按钮后显示6JButton button_2 = new JButton("6");button_2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.append('6');String str=s.toString();textField_1.setT ext(str);}});button_2.setBounds(193, 271, 93, 44);contentPane.add(button_2);//按钮'5',监听到按钮后显示5JButton button_3 = new JButton("5");button_3.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.append('5');String str=s.toString();textField_1.setT ext(str);}button_3.setBounds(100, 271, 93, 44);contentPane.add(button_3);//按钮'4',监听到按钮后显示4button_4.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.append('4');String str=s.toString();textField_1.setT ext(str);}});button_4.setBounds(10, 271, 93, 44);contentPane.add(button_4);//按钮'-',监听到按钮后显示-JButton button_5 = new JButton("-");button_5.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.append('-');String str=s.toString();textField_1.setT ext(str);}});button_5.setBounds(285, 313, 93, 44); contentPane.add(button_5);//按钮'3',监听到按钮后显示3JButton button_6 = new JButton("3");button_6.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.append('3');String str=s.toString();textField_1.setT ext(str);}});button_6.setBounds(193, 313, 93, 44); contentPane.add(button_6);//按钮'2',监听到按钮后显示2JButton button_7 = new JButton("2");button_7.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { s.append('2');String str=s.toString();textField_1.setT ext(str);}});button_7.setBounds(100, 313, 93, 44); contentPane.add(button_7);//按钮'1',监听到按钮后显示1button_8.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s.append('1');String str=s.toString();textField_1.setT ext(str);}});button_8.setBounds(10, 313, 93, 44);contentPane.add(button_8);//按钮'+',监听到按钮后显示+JButton button_9 = new JButton("+");button_9.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {s.append('+');String str=s.toString();textField_1.setT ext(str);}button_9.setBounds(285, 355, 93, 44); contentPane.add(button_9);//按钮'=',点击按钮'=',将计算出结果**********************************JButton button_10 = new JButton("=");button_10.setForeground(Color.RED);button_10.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String str=s.toString();String ss=str;String index="[-]|[+]|[/]|[*]";String number[]=str.split(index);int count=number.length;double num[]=new double[count];for(int i=0;i<count;i++){< p="">num[i]=Double.parseDouble(number[i]);}double result=0;if(ss.contains("+")){result=num[0];for(int i=1;i<count;i++){< p="">result+=num[i];}}if(ss.contains("-")){result=num[0];for(int i=1;i<count;i++){< p="">result-=num[i];}if(ss.contains("*")){result=num[0];for(int i=1;i<count;i++){< p="">result*=num[i];}}if(ss.contains("/")){result=num[0];for(int i=1;i<count;i++){< p="">if(num[i]==0){//除数等于0时，显示错误信息textField_2.setT ext("出错");return;}else {result/=num[i];}}}//int i=(int)Math.round(result*100);//result=(double)i/100;textField_2.setT ext(""+result);}});button_10.setBounds(193, 355, 93, 44); contentPane.add(button_10);//按钮'.',监听到按钮后显示。