用java用语言设计算器.doc

Java语言设计一个计算器！要稍微有点亮点的，比如输出的字是彩色的等，还要有详细的解说 悬赏分：0 | 解决时间：2011-1-14 08:59 | 提问者：匿名 跪求Java语言设计一个计算器！要稍微有点亮点的，比如输出的字是彩色的或者其他什么的，还要有详细的解说邮箱664744815最佳答案 import java.awt.Color;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.WindowConstants;import javax.swing.border.LineBorder;class Normal double i,j; public Normal(double num1,double num2) i=num1; j=num2; public double puls() return i+j; public double subtract() return i-j; public double multiply() return i*j; public double divide() return i/j; public double surpuls() return i%j; class scientific extends Normal public scientific(int num1, int num2) super(num1, num2); public class calc extends JFrame public static void main(String args) viewNormal VN= new viewNormal(normal); class viewNormal extends JFrame implements ActionListener JPanel jp1 = new JPanel(new GridLayout(4,3,5,5); JPanel jp2 = new JPanel(new GridLayout(5,1,5,5); JLabel jl; JButton jb; JButton jbs,jbo,jba,jbb,jbc,jby; StringBuffer sb = new StringBuffer(); Normal normal; int dot=0; double fnum=0; double lnum=0; double result; String sign=null; public viewNormal(String title) setTitle(title); setLayout(null); setVisible(true); setBounds(200,200,305,350); setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); jb= new JButton12; for(int i=0;i9;i+) jbi=new JButton(+(i+1); jp1.add(jbi); jbi.addActionListener(this); jb9=new JButton(.); jb10=new JButton(0); jb11=new JButton(=); jb9.addActionListener(this); jb10.addActionListener(this); jb11.addActionListener(this); jp1.add(jb9); jp1.add(jb10); jp1.add(jb11); jp1.setBounds(10, 100, 200, 200); jbs= new JButton(+);jbo= new JButton(-);jba= new JButton(*); jbb= new JButton(/);jby= new JButton(%);jbc= new JButton(C); jbs.addActionListener(this);jbo.addActionListener(this);jba.addActionListener(this); jbb.addActionListener(this);jby.addActionListener(this);jbc.addActionListener(this); /jp2.add(jby); jp2.add(jbs);jp2.add(jbo);jp2.add(jba);jp2.add(jbb);jp2.add(jbc); jp2.setBounds(215, 100, 70, 200); jl= new JLabel(0,JLabel.RIGHT); jl.setFont(new Font(Batang,Font.BOLD, 20); jl.setBorder(new LineBorder(Color.black,2); jl.setBackground(Color.white); jl.setBounds(10, 40, 275, 50); jl.setOpaque(true); add(jl); add(jp1); add(jp2); /+ public void sum() lnum=Double.parseDouble(sb.toString(); normal=new Normal(fnum,lnum); fnum=normal.puls(); result=fnum; /- private void sub() System.out.println(sb.toString(); lnum=Double.parseDouble(sb.toString(); normal=new Normal(fnum,lnum); fnum=normal.subtract(); result=fnum; /* private void mul() lnum=Double.parseDouble(sb.toString(); normal=new Normal(fnum,lnum); fnum=normal.multiply(); result=fnum; / / private void div() lnum=Double.parseDouble(sb.toString(); normal=new Normal(fnum,lnum); fnum=normal.divide(); result=fnum; /% private void sur() lnum=Double.parseDouble(sb.toString(); normal=new Normal(fnum,lnum); fnum=normal.surpuls(); result=fnum; / = private void same() if(sign.equals(+) sum(); if(sign.equals(-) sub(); if(sign.equals(*) mul(); if(sign.equals(/) div(); if(sign.equals(%) sur(); /result public void Result() if(result%1!=0) jl.setText(+result); else int i=(int)result; jl.setText(+i); Override public void actionPerformed(ActionEvent e) /System.out.println(sb.toString(); / 19 for(int i=0;i9;i+) if(e.getSource()=jbi&!sb.toString().equals(0) sb.append(jbi.getText(); jl.setText(sb.toString(); else if(e.getSource()=jbi&sb.toString().equals(0) int d=sb.length(); sb.delete(0, d); sb.append(jbi.getText(); jl.setText(sb.toString(); / 0 if(e.getSource()=jb10&!sb.toString().equals(0) sb.append(jb10.getText(); jl.setText(sb.toString(); / . if(e.getSource()=jb9&dot=0&!sb.toString().equals() dot+; sb.append(jb9.getText(); jl.setText(sb.toString(); / = if(e.getSource()=jb11&!sb.toString().equals() same(); Result(); int d=sb.length(); sb.delete(0, d); dot=0; / + if(e.getSource()=jbs&!sb.toString().equals() if(sign!=+&sign!=null) same(); else sum(); sign =+; Result(); int d=sb.length(); sb.delete(0, d); dot=0; /- if(e.getSource()=jbo&!sb.toString().equals() if(fnum=0) fnum=2*Double.parseDouble(sb.toString(); if(sign!=-&sign!=null) same(); else sub(); sign =-; Result(); int d=sb.length(); sb.delete(0, d); dot=0; /* if(e.getSource()=jba&!sb.toString().equals() if(fnum=0) fnum=1; if(sign!=*&sign!=null) same(); else mul(); sign =*; Result(); int d=sb.length(); sb.delete(0, d); dot=0; / / if(e.getSource()=jbb&!sb.toString().equals() if(fnum=0) fnum=Math.pow(Double.parseDouble(sb.toString(),2); if(sign!=/&sign!=null) same(); else div(); sign =/; Result(); int d=sb.length(); sb.delete(0, d); dot=0; /%/ if(e.getSource()=jby&!sb.toString().equals()/ if(fnum=0)/ fnum=Double.parseDouble(sb.toString();/ result=fnum;/ / else / if(sign!=%&sign!=null)/ same();/ else/ lnum=Double.parseDouble(sb.toString();/ normal=new Normal(fnum,lnum);/ fnum=normal.surpuls();/ result=fnum;/ / / sign =%;/ Result();/ int d=sb.length();/ sb.delete(0, d);/ dot=0;/ /clear if(e.getSource()=jbc) int d=sb.length(); sb.delete(0, d); jl.setText(0); dot=0; fnum=0; lnum=0; sign=null; class viewScientific extends viewNormal public viewScientific(String title) super(title); setBounds(200,200,800,500); public class Baidu public static void main(String args) throws Exception Runtime.getRuntime().exec(calc.exe); import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Calculator implements ActionListenerprivate double data1=0.0,data2=0.0;private String t_content;boolean number=false;/key用来标示用户所按下的按钮即加减乘除/key为0标示+，为1表示-，为2表示*，为3表示/short key=-1;/pkey的取值为-15/pkey为-1表示第一次按下=按钮，为5说明不是第一次按下=按钮/pkey为其他值0,1,2,3时分别代表+，-,*，/short pkey=-1;Frame frame=new Frame(Calculator);/定义标题为Calculator的窗体TextField textfield=new TextField(30);/定义计算机/定义backspace,ce,c0按钮Button backspace=new Button(Backspace);Button ce=new Button(CE);Button c0=new Button(C);/定义面板，其中backspace,ce,c0按钮和计算机兰textfeild放在面板p1中/其余按钮放在面板p2中Panel p1=new Panel();Panel p2=new Panel();/定义界面上的按钮数组，即除去backspace,ce,c0按钮的所有按钮String names=7,8,9,/,sqrt,4,5,6,*,%,1,2,3,-,1/x,0,+/-,.,+,=;Button bb=new Buttonnames.length;public static void main(String args) Calculator cal=new Calculator(); cal.go();public void go()frame.setSize(300,200);frame.setLayout(new BorderLayout();Font fonts=new Font(楷体_GB2312,Font.PLAIN,12); / 第一页/设置面板p1的字体和布局管理类型，将textfeild对象添加到面板中p1.setFont(fonts);p1.setLayout(new GridLayout(2,1,5,10);textfield.setFont(fonts);p1.add(textfield,null);/backspace,ce,c0按钮注册addActionListener方法backspace.addActionListener(this);ce.addActionListener(this);c0.addActionListener(this);/将backspace,ce,c0按钮添加到p1面板中p1.add(backspace,null);p1.add(ce,null);p1.add(c0,null);/设置面板p2的布局管理器类型为GridLayoutp2.setLayout(new GridLayout(4,5,5,5);/为按钮组中的按钮注册addActionListener方法for(int i=0;inames.length;i+)bbi=new Button(namesi);p2.add(bbi);bbi.addActionListener(this);/设置面板p1和面板p2在窗体中的位置/面板p1在窗体的North方向，面板p2在窗体的South方向frame.add(p1,BorderLayout.NORTH);frame.add(p2,BorderLayout.SOUTH);frame.setVisible(true);/当单击关闭按钮时退出系统frame.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit(0); ); public void actionPerformed(ActionEvent ae) String s; /通过ActionEvent类的getActionCommand()方法，得出动作是由哪个按钮触发的。 /第二页 s=ae.getActionCommand();/用户单击一次，计算栏里便去掉一个字符/先将计算栏里的字符清空，再添加除最好一个字符的字符串 if(s.equals(Backspace)&number) t_content=textfield.getText(); textfield.setText(); for(int i=0;it_content.length()-1;i+) char c=t_content.charAt(i); textfield.setText(textfield.getText()+c); /用户单击的是CE按钮，计算栏清空if(s.equals(CE) textfield.setText();number=false;/用户单击的是C按钮if(s.equals(C) textfield.setText();data1=data2=0.0;number=false;/用户单击的是sqrt按钮，其中负数不能被开方if(s.equals(sqrt)&number) t_content=textfield.getText(); if(t_content.charAt(0)=-) textfield.setText(负数不能被开方); number=false; else textfield.setText(Double.toString(java.lang.Math.sqrt(Double.parseDouble(t_content); /用户单击的是1/x求倒数按钮，求倒数时分母不能为0if(s.equals(1/x) & number) t_content=textfield.getText();if(t_content.equals(0) /第三页 textfield.setText(零不能求倒数); number=false;else textfield.setText(Double.toString(1/Double.parseDouble(t_content); /用户单击的是%按钮if(s.equals(%)&number) if(data2=0) t_content=textfield.getText(); textfield.setText(t_content);else boolean g=false; for(int i=0;itextfield.getText().length();i+) if(.=textfield.getText().charAt(i) g=true; break;/如果是Double 数，除100if(g=true) double dtemp=Double.parseDouble(textfield.getText(); dtemp=dtemp/100.0; textfield.setText(Double.toString(dtemp); /如果是int数但能被100整除，则去掉末尾两个0else if(Integer.parseInt(textfield.getText()%100=0) int itemp=Integer.parseInt(textfield.getText(); itemp/=100; textfield.setText(Integer.toString(itemp); /如果是int数，但不能被100整除，则按Double数处理else double dtemp=Double.parseDouble(textfield.getText(); dtemp=dtemp/100.0; textfield.setText(Double.toString(dtemp); /第四页 /对正负数字的处理 if(s.equals(+/-) t_content=textfield.getText(); if(t_content.charAt(0)=-) textfield.setText(); String content; for(int i=1;it_content.length();i+) textfield.setText(textfield.getText()+t_content.charAt(i); else textfield.setText(-+t_content); /所按下的按钮为+按钮if(s.equals(+) switch(pkey) case 0: data2+=Double.parseDouble(textfield.getText(); break; case 1: data2+=Double.parseDouble(textfield.getText(); break; case 2: data2+=Double.parseDouble(textfield.getText(); break; case 3: if(textfield.getText().equals(0) textfield.setText(除数不能为零); number=false; else key=-1; data2/=data1; textfield.setText(Double.toString(data2); break; default: data2=Double.parseDouble(textfield.getText(); pkey=key=0; textfield.setText(); /第五页 /所按下的按钮为-按钮if(s.equals(-) switch(pkey) case 0: data2+=Double.parseDouble(textfield.getText(); break; case 1: data2+=Double.parseDouble(textfield.getText(); break; case 2: data2+=Double.parseDouble(textfield.getText(); break; case 3: if(textfield.getText().equals(0) textfield.setText(除数不能为零); number=false; else key=-1; data2/=data1; textfield.setText(Double.toString(data2); break; default: data2=Double.parseDouble(textfield.getText(); pkey=key=1; textfield.setText(); /所按下的按钮为*按钮 if(s.equals(*) switch(pkey) case 0: data2+=Double.parseDouble(textfield.getText(); break; case 1: data2+=Double.parseDouble(textfield.getText(); break; case 2: data2+=Double.parseDouble(textfield.getText(); break; case 3: if(textfield.getText().equals(0) / 第六页 textfield.setText(除数不能为零); number=false; else key=-1; data2/=data1; textfield.setText(Double.toString(data2); break; default: data2=Double.parseDouble(textfield.getText(); pkey=key=2; textfield.setText(); /所按下的按钮为/按钮 if(s.equals(/) switch(pkey) case 0: data2+=Double.parseDouble(textfield.getText(); break; case 1: data2+=Double.parseDouble(textfield.getText(); break; case 2: data2+=Double.parseDouble(textfield.getText(); break; case 3: if(textfield.getText().equals(0) textfield.setText(除数不能为零); number=false; else key=-1; data2/=data1; textfield.setText(Double.toString(data2); break; default: data2=Double.parseDouble(textfield.getText(); pkey=key=3; textfield.setText(); /第七页 /所按下的按钮为=，求结果 if(s.equals(=)&number) /如果不是第一次按下=按钮 if(pkey=5) switch(pkey) case 0: data2+=data1; textfield.setText(Double.toString(data2); break; case 1: data2-=data1; textfield.setText(Double.toString(data2); break; case 2: data2*=data1; textfield.setText(Double.toString(data2); break; case 3: if(textfield.getText().equals(0) textfield.setText(除数不能为零); number=false; else data2/=data1; textfield.setText(Double.toString(data2); break; /如果是第一次按下=按钮 else data1=Double.parseDouble(textfield.getText(); switch(key) case 0: key=-1; data2+=Double.parseDouble(textfield.getText(); textfield.setText(Double.toString(data2); break; case 1: key=-1; data2-=Double.parseDouble(textfield.getText(); textfield.setText(Double.toString(data2); /第八页 break; case 2: key=-1; data2*=Double.parseDouble(textfield.getText(); textfield.setText(Double.toString(data2); break; case 3: if(textfield.getText().equals(0) textfield.setText(除数不能为零); number=false; else key=-1; data2/=Double.parseDouble(textfield.getText(); textfield.setText(Double.toString(data2); break; pkey=5; /按下的按钮时数字按钮 else switch(s.charAt(0) case0: case1: case2: case3: case4: case5: case6: case7: case8: case9: number=true; textfield.setText(textfield.getText()+s); break; /对.的处理 case.: t_content=textfield.getText(); boolean g=false; /第九页 /对计算机栏中的数据进行检验 /如果其中有小数点，则用户单击该按钮时不在添加小数点 for(int i=0;it_content.length();i+) if(t_content.charAt(i)=.) g=true; break; /数据中已经有小数点 if(g=true) break; / 数据中没有小数点，当用户单击小数点时添加小数点 if(g=false) textfield.setText(t_content+.); private String Integer(String string) / TODO Auto-generated method stub return null; 悬赏分：20 | 解决时间：2010-4-28 11:2