import javax.swing.text.BadLocationException; import javax.swing.text.PlainDocument;
//public class MyDocument extends PlainDocument{ // int maxLength =20;
// public MyDocument(int newMaxLength){ // super();
// maxLength = newMaxLength; // }
// public MyDocument(){ // this(20); // }
// public void insertString(int offset,String str,AttributeSet a)throws BadLocationException{
// if(getLength()+str.length()>maxLength){ // return; // }
// else{
// super.insertString(offset,str,a); //
// } // } //}
import java.awt.Color; import java.awt.Container; 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.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextField;
public class cc extends JFrame implements ActionListener { public static void main(String args[]) { new cc();
}
private static final long serialVersionUID = 1L; //获得内容面板
private Container con=getContentPane(); //创建菜单栏，菜单及菜单项
private JMenuBar menuBar=new JMenuBar(); private JMenu viewmenu=new JMenu(\"查看(V)\");
private JMenuItem general =new JMenuItem(\"标准型(T)\ private JMenuItem color =new JMenuItem(\"个性型(C)\ //创建一个容量为30个字符的文本框
private JTextField textField=new JTextField(30); //创建JLabel
private JLabel label=new JLabel(); //创建计算器的各种按钮
private JButton[] button=new JButton[27]; private String[] buttonstr={\"退格\\"CE\\"C\\"MC\\"7\\"8\\"9\\"/\\"sqrt\ \"MR\ \"M+\ //创建各种面板
private JPanel panel=new JPanel();
private JPanel childPanel=new JPanel(); private JPanel childPanel1=new JPanel(); private JPanel childPanel2=new JPanel(); private JPanel childPanel3=new JPanel(); private JPanel childPanel4=new JPanel(); private JPanel childPanel5=new JPanel(); private JPanel childPanel6=new JPanel(); //创建布局管理器
private GridLayout gridLayout=new GridLayout(6,1,6,6); private GridLayout gridLayout1=new GridLayout(1,3,6,6); private GridLayout gridLayout2=new GridLayout(1,6,6,6);
boolean tem=true; //标识0 double cache=0; //存储器
boolean temd=true; //标识小数点 boolean temm=false;//标识M+ boolean plus=false; //标识加 boolean subtract=false; //标识减 boolean mul=false; //标识乘 boolean div=false; //标识除 boolean rem=false; //百分号
public cc(){
viewmenu.setMnemonic('V'); viewmenu.add(general);
general.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) { childPanel.setBackground(Color.red); childPanel1.setBackground(Color.red); childPanel2.setBackground(Color.red); childPanel3.setBackground(Color.red); childPanel4.setBackground(Color.red); childPanel5.setBackground(Color.red); childPanel6.setBackground(Color.red); panel.setBackground(Color.red); } });
viewmenu.add(color);
color.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) { childPanel.setBackground(Color.blue); childPanel1.setBackground(Color.cyan); childPanel2.setBackground(Color.black); childPanel3.setBackground(Color.darkGray); childPanel4.setBackground(Color.green); childPanel5.setBackground(Color.lightGray); childPanel6.setBackground(Color.orange); panel.setBackground(Color.red); } });
menuBar.add(viewmenu); this.setJMenuBar(menuBar);
for(int i=0;i<27;i++){
button[i]=new JButton(buttonstr[i]); button[i].addActionListener(this);
}
panel.setLayout(gridLayout); panel.add(childPanel1); childPanel1.add(label); childPanel1.add(textField);
label.setBounds(10, 10, 10, 10); textField.setEditable(false);
//textField.setDocument(new MyDocument()); textField.setText(\"0\");
textField.setBackground(Color.WHITE);
textField.setHorizontalAlignment(JTextField.RIGHT);//设置文字从右边开始显示
panel.add(childPanel2);
childPanel2.setLayout(gridLayout1); childPanel2.add(button[0]); childPanel2.add(button[1]); childPanel2.add(button[2]);
panel.add(childPanel3);
childPanel3.setLayout(gridLayout2); childPanel3.add(button[3]); childPanel3.add(button[4]); childPanel3.add(button[5]); childPanel3.add(button[6]); childPanel3.add(button[7]); childPanel3.add(button[8]);
panel.add(childPanel4);
childPanel4.setLayout(gridLayout2); childPanel4.add(button[9]); childPanel4.add(button[10]); childPanel4.add(button[11]); childPanel4.add(button[12]); childPanel4.add(button[13]); childPanel4.add(button[14]);
panel.add(childPanel5);
childPanel5.setLayout(gridLayout2); childPanel5.add(button[15]); childPanel5.add(button[16]); childPanel5.add(button[17]); childPanel5.add(button[18]);
childPanel5.add(button[19]); childPanel5.add(button[20]);
panel.add(childPanel6);
childPanel6.setLayout(gridLayout2); childPanel6.add(button[21]); childPanel6.add(button[22]); childPanel6.add(button[23]); childPanel6.add(button[24]); childPanel6.add(button[25]); childPanel6.add(button[26]);
childPanel.add(panel); con.add(childPanel);
this.setResizable(false);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setBounds(400, 300, 400, 300); this.setTitle(\"孤风侠尘计算器\"); this.setVisible(true); }
//按钮事件处理 @Override
public void actionPerformed(ActionEvent e) { if(e.getSource()==button[4]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[4]); } else{
textField.setText(buttonstr[4]); tem=false; } }
if(e.getSource()==button[5]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[5]); } else{
textField.setText(buttonstr[5]); tem=false;
} }
if(e.getSource()==button[6]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[6]); } else{
textField.setText(buttonstr[6]); tem=false; } }
if(e.getSource()==button[10]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[10]); } else{
textField.setText(buttonstr[10]); tem=false; } }
if(e.getSource()==button[11]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[11]); } else{
textField.setText(buttonstr[11]); tem=false; } }
if(e.getSource()==button[12]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[12]); } else{
textField.setText(buttonstr[12]); tem=false; } }
if(e.getSource()==button[16]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[16]); } else{
textField.setText(buttonstr[16]);
tem=false; } }
if(e.getSource()==button[17]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[17]); } else{
textField.setText(buttonstr[17]); tem=false; } }
if(e.getSource()==button[18]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[18]); } else{
textField.setText(buttonstr[18]); tem=false; } }
if(e.getSource()==button[22]){ if(tem==false){
textField.setText(textField.getText()+buttonstr[22]); } else{
textField.setText(buttonstr[22]); //tem=false; } }
if(e.getSource()==button[0]){
if(textField.getText().length()>1){
textField.setText(textField.getText().substring(0,textField.getText().length()-1));
} else{
textField.setText(\"0\"); tem=true; } }
//CE键：清除当前显示的数据 if(e.getSource()==button[1]){ textField.setText(\"0\");
tem=true; tem=true; temd=true; temm=false; plus=false; subtract=false; mul=false; div=false; rem=false; }
//C键：清除所有数据
if(e.getSource()==button[2]){ textField.setText(\"0\"); cache=0; tem=true; tem=true; cache=0; temd=true; temm=false; plus=false; subtract=false; mul=false; div=false; rem=false; }
//MR键：将存于存储器中的数据显示出来 if(e.getSource()==button[9]){
textField.setText(\"\"+cache+\"\"); }
//MC键：清除存储器中数据
if(e.getSource()==button[3]){ cache=0;
label.setText(\"\"); }
//MS键：将显示的数据存储在存储器中 if(e.getSource()==button[15]){
cache=Double.parseDouble(textField.getText());
}
//M+键：将显示的数据与存储器中的数据相加并进行存储 if(e.getSource()==button[21]){ label.setText(\"M\");
cache=cache+Double.parseDouble(textField.getText()); temm=true; }
//处理小数点
if(e.getSource()==button[24]){
if(tem==false&&temd==true&&plus==false&&subtract==false&&mul==false&&rem==false&&div==false){
textField.setText(textField.getText()+\".\"); temd=false; } }
//处理1/x
if(e.getSource()==button[20]){
if(temd==true&&plus==false&&subtract==false&&mul==false&&rem==false&&div==false){
textField.setText(\"\"+1/Double.parseDouble(textField.getText())+\"\"); tem=true; } }
//处理+/-
if(e.getSource()==button[23]){
if(temd==true&&plus==false&&subtract==false&&mul==false&&rem==false&&div==false){
Double dou=Double.parseDouble(textField.getText()); dou=-dou;
textField.setText(\"\"+dou+\"\"); } }
//除法
if(e.getSource()==button[7]){
if(tem==false&&plus==false&&subtract==false&&mul==false&&rem==false&&div==false){
textField.setText(textField.getText()+\"/\"); div=true; } }
//乘法
if(e.getSource()==button[13]){
if(tem==false&&plus==false&&subtract==false&&mul==false&&rem==false&&div==false){
textField.setText(textField.getText()+\"*\"); mul=true; } }
//百分数表示
if(e.getSource()==button[14]){
if((plus==true&&subtract==false&&mul==false&&div==false)||(plus==false&&subtract==true&&mul==false&&div==false)||
(plus==false&&subtract==false&&mul==true&&div==false)||(plus==false&&subtract==false&&mul==false&&div==true)){ if(plus==true){
int i=textField.getText().indexOf(\"+\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length());
textField.setText(\"\"+(Double.parseDouble(substr1)+Double.parseDouble(substr1)*Double.parseDouble(substr2)/100)+\"\"); }
if(subtract==true){
int i=textField.getText().indexOf(\"-\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length());
textField.setText(\"\"+(Double.parseDouble(substr1)-Double.parseDouble(substr1)*Double.parseDouble(substr2)/100)+\"\"); }
if(mul==true){
int i=textField.getText().indexOf(\"*\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length());
textField.setText(\"\"+(Double.parseDouble(substr1)*(Double.parseDouble(substr1)*Double.parseDouble(substr2)/100))+\"\"); }
if(subtract==true){
int i=textField.getText().indexOf(\"/\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length());
textField.setText(\"\"+(Double.parseDouble(substr1)/(Double.parseDouble(substr1)*Double.parseDouble(substr2)/100))+\"\"); } } }
//加法
if(e.getSource()==button[25]){
if(tem==false&&plus==false&&subtract==false&&mul==false&&rem==false&&div==false){
textField.setText(textField.getText()+\"+\"); plus=true; } }
//减法
if(e.getSource()==button[19]){
if(tem==false&&plus==false&&subtract==false&&mul==false&&rem==false&&div==false){
textField.setText(textField.getText()+\"-\"); subtract=true; } }
//等于
if(e.getSource()==button[26]){ if(plus==true){
int i=textField.getText().indexOf(\"+\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length()); if(substr2.length()==0){
textField.setText(\"\"+substr1+\"\");
} else{ double
result=Double.parseDouble(substr1)+Integer.parseInt(substr2); textField.setText(\"\"+result+\"\"); }
plus=false; tem=true; }
if(subtract==true){
int i=textField.getText().indexOf(\"-\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length()); if(substr2.length()==0){
textField.setText(\"\"+substr1+\"\"); } else{ double
result=Double.parseDouble(substr1)-Integer.parseInt(substr2); textField.setText(\"\"+result+\"\"); }
subtract=false; tem=true; }
if(mul==true){
int i=textField.getText().indexOf(\"*\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length()); if(substr2.length()==0){
textField.setText(\"\"+substr1+\"\"); } else{ double
result=Double.parseDouble(substr1)*Integer.parseInt(substr2); textField.setText(\"\"+result+\"\"); }
mul=false; tem=true; }
if(div==true){
int i=textField.getText().indexOf(\"/\");
String substr1=textField.getText().substring(0,i); String
substr2=textField.getText().substring(i+1,textField.getText().length()); if(substr2.length()==0){
textField.setText(\"\"+substr1+\"\"); }
else if(Double.parseDouble(substr2)==0){ textField.setText(\"除数不能为零\"); } else{ double
result=Double.parseDouble(substr1)/Double.parseDouble(substr2); textField.setText(\"\"+result+\"\"); }
div=false; tem=true; } }
//求平方根
if(e.getSource()==button[8]){
if(plus==false&&subtract==false&&mul==false&&rem==false&&div==false&&tem==false){
textField.setText(\"\"+Math.sqrt(Double.parseDouble(textField.getText()))+\"\"); tem=true; } } } }
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