wustrive_2008
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2047699523：
java计算器源代码下载：http://www.zuidaim ...
java计算器小程序 -
wodetongnian：
thank you very much!
struts2.2+hibernate3.2+spring2整合入门实例 -
bawanglb：
，这个讲的通俗易懂，支持
Android学习之Android广播机制 -
wustrive_2008：
Java-in-my-life 写道再敢问这个排序能成功吗？试 ...
二分排序（java实现） -
Java-in-my-life：
再敢问这个排序能成功吗？
二分排序（java实现）
java做的计算器小程序：截图
功能键：
MC键：清除存储器中数据
CE键：清除当前显示的数据
C键：清除所有数据
MR键：将存于存储器中的数据显示出来
MS键：将显示的数据存储在存储器中
M+键：将显示的数据与存储器中的数据相加并进行存储
sqrt：开平方
代码：MyDocument.java(设置TextField可输入的最多字符数)：
package com.gufengxiachen.counter;
import javax.swing.text.AttributeSet;
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);
}
}
}
CounterFrame.java(计算器类,GUI和逻辑处理都在这个类中)：
package com.gufengxiachen.counter;
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 CounterFrame extends JFrame implements ActionListener {
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 JMenu helpmenu=new JMenu("帮助(H)");
private JMenuItem general =new JMenuItem("标准型(T)",'T');
private JMenuItem color =new JMenuItem("个性型(C)",'C');
private JMenuItem about=new JMenuItem("关于(A)",'A');
//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", "4", "5", "6", "*", "%", "MS", "1", "2", "3", "-", "1/x",
"M+", "0", "+/-", ".", "+", "=" };
//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 CounterFrame(){
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);
}
});
helpmenu.setMnemonic('H');
helpmenu.add(about);
about.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(CounterFrame.this,"孤风侠尘计算器1.0 作者：wustrive_2008",
" ",JOptionPane.INFORMATION_MESSAGE);
}
});
menuBar.add(viewmenu);
menuBar.add(helpmenu);
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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