package 软件工程;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import java.awt.GridLayout;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JButton;
import javax.swing.BoxLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.FlowLayout;
import java.awt.CardLayout;
import com.jgoodies.forms.layout.FormLayout;
import com.jgoodies.forms.layout.ColumnSpec;
import com.jgoodies.forms.layout.RowSpec;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import net.miginfocom.swing.MigLayout;
import javax.swing.border.LineBorder;
import javax.swing.SwingConstants;
public class Calculator extends JFrame {
private JPanel contentPane;
private JTextField numberField;
private JPanel panel;
private JPanel panel_1;
private JButton one;
private JButton seven;
private JButton subtraction;
private JButton two;
private JButton eight;
private JButton four;
private JButton nine;
private JButton six;
private JButton three;
private JButton five;
private JPanel panel_2;
private JButton multiplication;
private JButton sum;
private JButton as;
private JButton division;
private String result="";
private JButton Clear;
private JButton zero;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Calculator frame = new Calculator();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Calculator() {
this.setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 600);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout(0, 0));
//******************************************这个地方放显示的数据一个Panel里面装的JText
JPanel Top = new JPanel(); //**
Top.setPreferredSize(new Dimension(450, 100));
contentPane.add(Top, BorderLayout.NORTH);
Top.setLayout(new GridLayout(0, 1, 0, 0));
//**
numberField = new JTextField();
numberField.setFont(new Font("幼圆", Font.BOLD, 30));
numberField.setBackground(Color.LIGHT_GRAY);
numberField.setText("0");//
Top.add(numberField); //**
numberField.setColumns(10);
numberField.setEditable(false);//不可编辑
//监听器
ActionListener click=null;
click=new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
//当输入一个数时，计算器上面的0消失 fi(FIrsInput)第一个数字
String fi=numberField.getText().valueOf(0);
System.out.println(fi);
if(numberField.getText().equals("0")){numberField.setText(numberField.getText().replaceFirst("0", ""));}
//@param operate是判断当时的按钮是什么
String operate=e.paramString().substring(21, 22);
//考虑到如果先输入+-*/，这样会报错，不能让你输入
if(numberField.getText().equals("")&&(operate.equals("+")||operate.equals("-")||operate.equals("x")||operate.equals("/"))) {
numberField.setText("");
System.out.println(fi);}
else { //如果按的是操作符+-*/
if(operate.equals("/")||operate.equals("+")||operate.equals("-")||operate.equals("x"))
{
if(numberField.getText().matches("\\d*([x]|[/]|[-]|[+])\\d*"))
{
numberField.setText(""+cal());
}
else {
if(!(numberField.getText().endsWith("x")||numberField.getText().endsWith("-")||numberField.getText().endsWith("+")||numberField.getText().endsWith("/")))
{
numberField.setText(numberField.getText()+operate);
}
}
}
else//这是按了其他数字键
{
int number=Integer.parseInt(operate);
numberField.setText(numberField.getText()+number);
}
}
}
};
panel = new JPanel();
panel.setPreferredSize(new Dimension(320, 250));
contentPane.add(panel, BorderLayout.WEST);
two = new JButton("2");
two.addActionListener(click);
two.setBorder(new LineBorder(new Color(0, 0, 0)));
two.setMargin(new Insets(10, 14, 2, 14));
two.setFont(new Font("幼圆", Font.PLAIN, 30));
two.setPreferredSize(new Dimension(100, 115));
three = new JButton("3");
three.addActionListener(click);
three.setBorder(new LineBorder(new Color(0, 0, 0)));
three.setMargin(new Insets(10, 14, 2, 14));
three.setFont(new Font("幼圆", Font.PLAIN, 30));
three.setPreferredSize(new Dimension(100, 115));
four = new JButton("4");
four.addActionListener(click);
four.setBorder(new LineBorder(new Color(0, 0, 0)));
four.setMargin(new Insets(10, 14, 2, 14));
four.setFont(new Font("幼圆", Font.PLAIN, 30));
four.setPreferredSize(new Dimension(100, 115));
five = new JButton("5");
five.addActionListener(click);
five.setBorder(new LineBorder(new Color(0, 0, 0)));
five.setMargin(new Insets(10, 14, 2, 14));
five.setFont(new Font("幼圆", Font.PLAIN, 30));
five.setPreferredSize(new Dimension(100, 115));
six = new JButton("6");
six.addActionListener(click);
six.setBorder(new LineBorder(new Color(0, 0, 0)));
six.setMargin(new Insets(10, 14, 2, 14));
six.setFont(new Font("幼圆", Font.PLAIN, 30));
six.setPreferredSize(new Dimension(100, 115));
seven = new JButton("7");
seven.addActionListener(click);
seven.setBorder(new LineBorder(new Color(0, 0, 0)));
seven.setMargin(new Insets(10, 14, 2, 14));
seven.setFont(new Font("幼圆", Font.PLAIN, 30));
seven.setPreferredSize(new Dimension(100, 115));
eight = new JButton("8");
eight.addActionListener(click);
eight.setBorder(new LineBorder(new Color(0, 0, 0)));
eight.setMargin(new Insets(10, 14, 2, 14));
eight.setFont(new Font("幼圆", Font.PLAIN, 30));
eight.setPreferredSize(new Dimension(100, 115));
nine = new JButton("9");
nine.addActionListener(click);
nine.setBorder(new LineBorder(new Color(0, 0, 0)));
nine.setMargin(new Insets(10, 14, 2, 14));
nine.setFont(new Font("幼圆", Font.PLAIN, 30));
nine.setPreferredSize(new Dimension(100, 115));
panel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
one = new JButton("1");
//**************
one.addActionListener(click);
one.setBorder(new LineBorder(new Color(0, 0, 0)));
one.setMargin(new Insets(10, 14, 2, 14));
one.setFont(new Font("幼圆", Font.PLAIN, 30));
one.setPreferredSize(new Dimension(100, 115));
panel.add(one);
panel.add(two);
panel.add(three);
panel.add(four);
panel.add(five);
panel.add(six);
panel.add(seven);
panel.add(eight);
panel.add(nine);
panel_1 = new JPanel();
contentPane.add(panel_1, BorderLayout.EAST);
panel_1.setLayout(new BorderLayout(0, 0));
subtraction = new JButton("-");
subtraction.addActionListener(click);
subtraction.setFont(new Font("幼圆", Font.BOLD, 30));
subtraction.setPreferredSize(new Dimension(90, 126));
panel_1.add(subtraction, BorderLayout.NORTH);
sum = new JButton("+");
sum.addActionListener(click);
sum.setFont(new Font("幼圆", Font.BOLD, 30));
sum.setPreferredSize(new Dimension(90, 100));
panel_1.add(sum, BorderLayout.SOUTH);
Clear = new JButton("C");
Clear.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
numberField.setText("");
}
});
Clear.setPreferredSize(new Dimension(90, 126));
panel_1.add(Clear, BorderLayout.WEST);
panel_2 = new JPanel();
panel_2.setPreferredSize(new Dimension(10, 80));
contentPane.add(panel_2, BorderLayout.SOUTH);
panel_2.setLayout(new BorderLayout(0, 0));
multiplication = new JButton("x");
multiplication.addActionListener(click);
multiplication.setFont(new Font("幼圆", Font.BOLD, 30));
multiplication.setMargin(new Insets(2, 0, 2, 50));
multiplication.setPreferredSize(new Dimension(150, 100));
panel_2.add(multiplication, BorderLayout.WEST);
as = new JButton("=");
as.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
numberField.setText(""+cal());
}
});
as.setFont(new Font("幼圆", Font.BOLD, 30));
as.setPreferredSize(new Dimension(150, 100));
panel_2.add(as, BorderLayout.EAST);
division = new JButton("/");
division.addActionListener(click);
division.setFont(new Font("幼圆", Font.BOLD, 30));
division.setPreferredSize(new Dimension(150, 100));
panel_2.add(division, BorderLayout.CENTER);
zero = new JButton("0");
zero.addActionListener(click);
zero.setFont(new Font("宋体", Font.PLAIN, 20));
panel_2.add(zero, BorderLayout.NORTH);
//******************************************
}
public int sum(String zhi)
{
this.result=result+zhi;
return Integer.parseInt(result);
}
//运算的方法，运算；；；；
public int cal() {
//如果为空直接返回了
String patt= "\\d*([x]|[-]|[+]|[/])\\d*";
if(!numberField.getText().matches(patt)) {return 0;}
//加减乘除
String zhi=numberField.getText();
if (zhi.contains("x")) {
String head=zhi.split("x")[0];
String foot=zhi.split("x")[1];
//返回乘法
return p(head)*p(foot);
}else if(zhi.contains("/")) {
String head=zhi.split("/")[0];
String foot=zhi.split("/")[1];
//返回触发
return p(head)/p(foot);
}else if(zhi.contains("+")) {
String head=zhi.split("[+]")[0];
String foot=zhi.split("[+]")[1];
//返回假发
return (p(head))+(p(foot));
}else if(zhi.contains("-")) {
String head=zhi.split("-")[0];
String foot=zhi.split("-")[1];
//返回减法
return p(head)-p(foot);
}
return 0;
// System.out.println(zhi.indexOf("x"));
// System.out.println("head:"+head);
// System.out.println("foot:"+foot);
// return parseInt(head)*parseInt(foot);
}
//parseInt磨成int类型
public int p(String str)
{
return Integer.parseInt(str);
}
}
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