这是3月中旬写的计算器，通过与之前刚刚学习的登录界面相结合，通过登录界面进入计算器。
首先，谈一谈感想，对于计算器模块，基本上都是自己在冥思苦想，花了一天弄出来的，真心不容易啊，界面还是相当好看的。
计算器的button很多，当时采用的是空布局，对每个button的位置和内容是一个个设置的，十分的繁琐。而这可以通过用面板来实现，比如数字键盘构造一个网格布局的面板。
而且，计算器只实现了加减乘除，取余，倒数，取反，根号这些功能，对于实数只能输出数字，而不能进行运算。并且，整数的运算第二个数只能是个位数，当然，这个可以用将运算符及前面的数清空来实现。
//登录界面 （仿QQ界面）
import java.awt.Color;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class LoginFrame {
public void last(){
//创建窗体
JFrame jf = new JFrame();
//设置边框
jf.setTitle("只为不凡而来！");
jf.setDefaultCloseOperation(3);
jf.setLayout(null);
//设置窗体颜色
jf.setBackground(Color.BLUE);
//设置窗体位置及大小
jf.setBounds(490,240,380,290);
jf.setResizable(false);//设置禁止用户调整窗体的大小
JLabel label1 = new JLabel("帐号");
jf.add(label1);
label1.setBounds(110,120,30,22);
JTextField name= new JTextField ();
jf.add(name);
name.setBounds(150,120,150,22);
JLabel label2 = new JLabel("密码");
jf.add(label2);
label2.setBounds(110,150,30,22);
JPasswordField password= new JPasswordField(10);
jf.add(password);
password.setBounds(150,150,150,22);
JButton loginbutton = new JButton("登录");
jf.add(loginbutton);
loginbutton.setBounds(110,215,150,30);
JCheckBox box = new JCheckBox("记住密码");
jf.add(box);
box.setBounds(110,180,80,15);
JCheckBox box1= new JCheckBox("自动登录");
jf.add(box1);
box1.setBounds(200,180,80,15);
ImageIcon icon1 = new ImageIcon("img/qizai.jpg");
JLabel imgLabel2 = new JLabel(icon1);
imgLabel2.setBounds(20,120,80,80);
jf.add(imgLabel2);
jf.setVisible(true);
ImageIcon icon = new ImageIcon("img/天空.jpg");
JLabel imgLabel = new JLabel(icon);
imgLabel.setBounds(0,0,400,300);
jf.add(imgLabel);
LoginListener m = new LoginListener (name,password);
loginbutton.addActionListener(m);
jf.setVisible(true);
}
public static void main(String[] args) {
LoginFrame f1 = new LoginFrame();
f1.last();
}
}
//登录界面的监听器，计算器的入口
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class LoginListener implements ActionListener {
private JTextField name ;
private JPasswordField password;
public LoginListener (JTextField name,JPasswordField password){
this.name=name;
this.password=password;
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String nm=name.getText();
String ps=password.getText();
if((nm.equals("5") && ps.equals("1")) || (nm.equals("123456789") && ps.equals("12345"))){
JFrame jf1= new JFrame();
jf1.setTitle("英雄联盟计算器！"); //设置边框
jf1.setDefaultCloseOperation(3);
jf1.setLayout(null); //设置窗体的布局方式为空布局
jf1.setBackground(Color.GRAY); //设置窗体颜色
jf1.setBounds(480,150,370,450); //设置窗体位置及大小
jf1.setResizable(false); //设置禁止用户调整窗体的大小
JTextField field= new JTextField (15);
jf1.add(field);
field.setBounds(10,10,340,150);
field.setEditable(false);
field.setOpaque(false);
JButton b21= new JButton("←");
jf1.add(b21);
b21.setBounds(10,170,60,40);
ButtonListener m21 = new ButtonListener(field);
b21.addActionListener(m21);
jf1.setVisible(true);
JButton b20= new JButton("CE");
jf1.add(b20);
b20.addActionListener(m21);
b20.setBounds(80,170,60,40);
JButton b19= new JButton("C");
jf1.add(b19);
b19.addActionListener(m21);
b19.setBounds(150,170,60,40);
JButton b18= new JButton("±");
jf1.add(b18);
b18.addActionListener(m21);
b18.setBounds(220,170,60,40);
JButton b17= new JButton("√");
jf1.add(b17);
b17.addActionListener(m21);
b17.setBounds(290,170,60,40);
JButton b7= new JButton("7");
jf1.add(b7);
b7.addActionListener(m21);
b7.setBounds(10,220,60,40);
JButton b8= new JButton("8");
jf1.add(b8);
b8.addActionListener(m21);
b8.setBounds(80,220,60,40);
JButton b9= new JButton("9");
jf1.add(b9);
b9.addActionListener(m21);
b9.setBounds(150,220,60,40);
JButton b10= new JButton("/");
jf1.add(b10);
b10.addActionListener(m21);
b10.setBounds(220,220,60,40);
JButton b16= new JButton("%");
jf1.add(b16);
b16.addActionListener(m21);
b16.setBounds(290,220,60,40);
JButton b4= new JButton("4");
jf1.add(b4);
b4.addActionListener(m21);
b4.setBounds(10,270,60,40);
JButton b5= new JButton("5");
jf1.add(b5);
b5.addActionListener(m21);
b5.setBounds(80,270,60,40);
JButton b6= new JButton("6");
jf1.add(b6);
b6.addActionListener(m21);
b6.setBounds(150,270,60,40);
JButton b11= new JButton("*");
jf1.add(b11);
b11.addActionListener(m21);
b11.setBounds(220,270,60,40);
JButton b15= new JButton("1/x");
jf1.add(b15);
b15.addActionListener(m21);
b15.setBounds(290,270,60,40);
JButton b1= new JButton("1");
jf1.add(b1);
b1.addActionListener(m21);
b1.setBounds(10,320,60,40);
JButton b2= new JButton("2");
jf1.add(b2);
b2.addActionListener(m21);
b2.setBounds(80,320,60,40);
JButton b3= new JButton("3");
jf1.add(b3);
b3.addActionListener(m21);
b3.setBounds(150,320,60,40);
JButton b12= new JButton("-");
jf1.add(b12);
b12.addActionListener(m21);
b12.setBounds(220,320,60,40);
JButton b14= new JButton("=");
jf1.add(b14);
b14.addActionListener(m21);
b14.setBounds(290,320,60,90);
JButton b0= new JButton("0");
jf1.add(b0);
b0.addActionListener(m21);
b0.setBounds(10,370,130,40);
JButton b23= new JButton(".");
jf1.add(b23);
b23.addActionListener(m21);
b23.setBounds(150,370,60,40);
JButton b13= new JButton("+");
jf1.add(b13);
b13.addActionListener(m21);
b13.setBounds(220,370,60,40);
ImageIcon icon3 = new ImageIcon("img/blue.jpg");
JLabel imgLabel3= new JLabel(icon3);
imgLabel3.setBounds(0,0,400,420);
jf1.add(imgLabel3);
jf1.setVisible(true);
}
else JOptionPane.showMessageDialog(null, "账号或者密码错误");
}
}
//计算器的监听器
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JTextField;
public class ButtonListener implements ActionListener {
private String content;
int number;
double re,ff;
int a=0,b,z=0;
double rec,sq,poi=0;
String m,p="",mi="",mul="",div="",rem="",po="";
double neg;
private JTextField jt;
//定义运算函数
double plus ( double m, double n ) {
return m+n;
}
double minus(double m ,double n) {
return m-n;
}
double multiply(double m,double n) {
return m*n;
}
double divide(double m,double n) {
return m/n;
}
int remainder (int m,int n) {
return m%n;
}
double reciproc (double m) {
return (double) 1/m;
}
double negate(double m) {
m=-m;
return m;
}
public ButtonListener(JTextField jt){
this.jt=jt;
}
public void actionPerformed(ActionEvent e) {
content=jt.getText(); //获取输入框中的文本
try{
//ff = Float.parseFloat(e.getActionCommand());
number=Integer.parseInt(e.getActionCommand()); //将事件源转化为数字进行判断
}catch(Exception ex){
}
if(0<=number && number<10){ //判断事件源为数字
b=number;
if(content.equals(p)){ //通过判断选择与之对应的函数进行运算
re=plus(a,b); //加法运算
}
if(content.equals(mi)){
re=minus(a,b); //减法运算
}
if(content.equals(mul)){
re=multiply(a,number); //乘法运算
}
if(content.equals(div)){
re=divide(a,number); //除法运算
}
if(content.equals(rem)){
re=remainder(a,number); //取余运算
}
if(content.equals(po)){
jt.setText(""+poi); //小数点运算
}
jt.setText(content+number);
}
if(e.getActionCommand().equals("+")){
jt.setText(content+e.getActionCommand());
m=e.getActionCommand();
a=Integer.parseInt(content);
jt.setText(content+m);
p=content+m;
}
else if(e.getActionCommand().equals("-")){
jt.setText(content+e.getActionCommand());
m=e.getActionCommand();
a=Integer.parseInt(content);
jt.setText(content+m);
mi=content+m;
}
else if(e.getActionCommand().equals("*")){
jt.setText(content+e.getActionCommand());
m=e.getActionCommand();
a=Integer.parseInt(content);
jt.setText(content+m);
mul=content+m;
}
else if(e.getActionCommand().equals("/")){
jt.setText(content+e.getActionCommand());
m=e.getActionCommand();
a=Integer.parseInt(content);
jt.setText(content+m);
div=content+m;
}
else if(e.getActionCommand().equals("%")){
jt.setText(content+e.getActionCommand());
m=e.getActionCommand();
a=Integer.parseInt(content);
jt.setText(content+m);
rem=content+m;
}
else if(e.getActionCommand().equals("1/x")){
a=Integer.parseInt(content);
rec=reciproc(a);
jt.setText("reciproc("+content+")="+rec);
}
else if(e.getActionCommand().equals("±")){
a=Integer.parseInt(content);
neg=negate(a);
jt.setText("reciproc("+content+")="+neg);
}
else if(e.getActionCommand().equals("√")){
a=Integer.parseInt(content);
sq=Math.sqrt(a);
jt.setText("sqrt("+content+")="+sq);
}
else if(e.getActionCommand().equals(".")){
m=e.getActionCommand();
a=Integer.parseInt(content);
po=content+m;
jt.setText(po);
}
//以下还未实现
else if(e.getActionCommand().equals("C")){
jt.setText(content+m);
}
else if(e.getActionCommand().equals("CE")){
jt.setText(content+m);
}
else if(e.getActionCommand().equals("←")){
jt.setText(content+e.getActionCommand());
m=e.getActionCommand();
a=Integer.parseInt(content);
jt.setText(content+m);
mi=content+m;
}
else if(e.getActionCommand().equals("=")){
jt.setText(content+e.getActionCommand()+re);
}
}
}
