java模擬科學計算器課程設計

1、軟 件 學 院課程設計報告書課程名稱 Java 6程序設計 設計題目 模擬科學計算器 專業(yè)班級 學 號 姓 名 指導教師 2013 年 6 月目錄1設計時間32設計目的33設計任務34設計內(nèi)容34.1需求分析34.1.1問題描述34.1.2基本要求34.2總體設計34.2.1 包的描述34.2.2 類的描述44.2.3類之間的關系44.3詳細設計44.3.1類圖44.3.2頁面設計44.4測試與分析54.5 程序代碼65總結與展望18參考文獻19課程設計成績評定191 設計時間2013/6/10-2013/6/162 設計目的其目的在于通過實踐加深對面向對象程序設計的理論、方法和基礎知識的理解

2、，掌握使用Java語言進行面向對象設計的基本方法，提高運用面向對象知識分析實際問題、解決實際問題的能力，提高應用能力。3設計任務界面模擬Windows中的計算器程序。實現(xiàn)基本數(shù)學運算、函數(shù)等功能：加、減、乘、除、階乘、正弦、余弦和指數(shù)運算。添加相關組件并進行按鈕事件處理。4 設計內(nèi)容 4.1需求分析4.1.1問題描述 日常生活中經(jīng)常需要用到計算器，比如科學計算、數(shù)值計算、會計業(yè)務等，在Applet中實現(xiàn)一個精巧實用的計算器，可以讓用戶在使用網(wǎng)站服務的同時，可以很方便的驚醒數(shù)據(jù)運算，可增加頁面的實用性，同時讓用戶的操作也更加方便月快捷。4.1.2基本要求本項目需要實現(xiàn)一個具有四則運算的計算器，擁

3、有加，減，乘，除功能。除此之外，本次設計的程序添加了階乘、正弦、余弦和指數(shù)運算功能。4.2總體設計4.2.1 包的描述import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.math.*;4.2.2 類的描述只用了一個Calculator類里邊包含程序入口 main函數(shù)，Calculator()構造函數(shù)完成對各個組件的定義和初始化，myEvent()完成事件監(jiān)聽的各種功能。4.2.3類之間的關系Calculator類集中完成各項功能4.3詳細設計4.3.1類圖 圖4.3.1-1 myeclipse自動

4、生成類圖4.3.2頁面設計圖4.3.2-1 計算機完成界面4.4測試與分析圖4.4-1 運行成功圖4.4-2 7*8運行結果 圖4.4-3 12/4運行結果 圖4.4-4 88/0運行結果圖4.4-5 78-4運行結果圖4.4-6 45+65運行結果圖4.4-7 53運行結果圖4.4-8 5!運行結果圖4.4-9 Sin 90運行結果4.5程序代碼import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.math.*;class CalculatorGridLayout l1;GridLayout l2

5、;BorderLayout l3;Frame f;Panel p1,p2;JTextField t1;TextField t2;JButton b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19, b20;StringBuffer str;double x, y;int z;static double m;public Calculator()f = new Frame(計算器);f.setBounds(300,100,600,500);l1 = new GridLayout(

6、1,5, 5, 5);l2 = new GridLayout(4,5,5,5);l3 = new BorderLayout();p1 = new Panel();p2 = new Panel();t1 = new JTextField(27);t1.setHorizontalAlignment(JTextField.RIGHT);t1.setEnabled(true);t1.setText(0);t2 = new TextField();t2.setEnabled(false);b1 = new JButton(7);b1.setForeground(Color.black);b2 = new

7、 JButton(8);b2.setForeground(Color.black);b3 = new JButton(9);b3.setForeground(Color.black);b4 = new JButton(/);b4.setForeground(Color.blue);b5 = new JButton(x!);b5.setForeground(Color.blue);b6 = new JButton(4);b6.setForeground(Color.black);b7 = new JButton(5);b7.setForeground(Color.black);b8 = new

8、JButton(6);b8.setForeground(Color.black);b9 = new JButton(*);b9.setForeground(Color.blue);b10 = new JButton(xy);b10.setForeground(Color.blue);b11 = new JButton(1);b11.setForeground(Color.black);b12 = new JButton(2);b12.setForeground(Color.black);b13 = new JButton(3);b13.setForeground(Color.black);b1

9、4 = new JButton(-);b14.setForeground(Color.blue);b15 = new JButton(C);b15.setForeground(Color.red);b16 = new JButton(0);b16.setForeground(Color.black);b17 = new JButton(sin);b17.setForeground(Color.pink);b18 = new JButton(cos);b18.setForeground(Color.pink);b19 = new JButton(+);b19.setForeground(Colo

10、r.blue);b20 = new JButton(=);b20.setForeground(Color.green);str = new StringBuffer();p1.add(t1);p1.setBounds(10,25,300,45);p1.setLayout(l1);p2.setLayout(l2);p2.add(b1);p2.add(b2);p2.add(b3);p2.add(b4);p2.add(b5);p2.add(b6);p2.add(b7);p2.add(b8);p2.add(b9);p2.add(b10);p2.add(b11);p2.add(b12);p2.add(b

11、13);p2.add(b14);p2.add(b15);p2.add(b16);p2.add(b17);p2.add(b18);p2.add(b19);p2.add(b20);p2.setBounds(10,65,300,30);f.setTitle(計算器);f.setResizable(false);f.setBackground(new Color(200,200,100);f.setBounds(100, 100, 420, 250);f.setLayout(l3);f.add(BorderLayout.NORTH, p1);f.add(BorderLayout.CENTER, p2)

12、;myEvent();f.setVisible(true);private void myEvent() f.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e0) System.exit(0); ); try b1.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e1) t1.setText(str.append(7).toString(); y=Double.parseDouble(t1.ge

13、tText().trim(); ) ; b2.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e2) t1.setText(str.append(8).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b3.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e3) t1.setText(str.append(9).toString(); y=

14、Double.parseDouble(t1.getText().trim(); ) ; b6.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e6) t1.setText(str.append(4).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b7.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e7) t1.setText(str.

15、append(5).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b8.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e8) t1.setText(str.append(6).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b11.addMouseListener(new MouseAdapter() public void mouseClicked(Mouse

16、Event e11) t1.setText(str.append(1).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b12.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e12) t1.setText(str.append(2).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b13.addMouseListener(new MouseAdapter() pu

17、blic void mouseClicked(MouseEvent e13) t1.setText(str.append(3).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b16.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e16) t1.setText(str.append(0).toString(); y=Double.parseDouble(t1.getText().trim(); ) ; b15.addMouseLi

18、stener(new MouseAdapter() public void mouseClicked(MouseEvent e15) t1.setText(0); str.setLength(0); ) ; b19.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e19) x=Double.parseDouble(t1.getText().trim(); str.setLength(0); y=0d; z=0; ) ; b14.addMouseListener(new MouseAdapter()

19、public void mouseClicked(MouseEvent e14) x=Double.parseDouble(t1.getText().trim(); str.setLength(0); y=0d; z=1; ) ; b9.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e9) x=Double.parseDouble(t1.getText().trim(); str.setLength(0); y=0d; z=2; ) ; b4.addMouseListener(new MouseA

20、dapter() public void mouseClicked(MouseEvent e4) x=Double.parseDouble(t1.getText().trim(); str.setLength(0); y=0d; z=3; ) ; b5.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e5) x=Integer.parseInt(t1.getText(); int sum=1; for(int i=1;i=x;i+) sum*=i; x=sum; y=0d; z=0; ) ; b10

21、.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e10) x=Integer.parseInt(t1.getText(); str.setLength(0); t1.setText( ); y=0d; z=4; ) ; b17.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e17) x=Integer.parseInt(t1.getText(); x=Math.round(Math.sin(x); y

22、=0d; z=0; ) ; b18.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e18) x=Integer.parseInt(t1.getText(); x=Math.round(Math.cos(x); y=0d; z=0; ) ; b20.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e20) str.setLength(0); switch(z) case 0 : t1.setText(+(x+y);break; case 1 : t1.setText(+(x-y);break; case 2 : t1.setText(+(x*y);break; case 3 : t1.setText(+(x/y);br