Java编写能完成复数运算的程序

Java编写能完成复数运算的程序

题目简介：

整体分析：

界面分析：

实验代码：

package complex;

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JPanel;

import java.awt.BorderLayout;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.SwingConstants;

import javax.swing.border.EmptyBorder;

import javax.swing.JButton;

import java.awt.Font;

public class Complex implements ActionListener {

    String s,s1,s2,s3,s4;        //s为运算符号，s1,s3为两个虚数的实部，s2,s4为两个虚数的虚部

    double a,b,c,d,ans1,ans2;    //对应的字符串转化为数值后：a,c为两个虚数的实部，b,d为两个虚数的虚部

                                //ans1，ans2为计算结果

    private JFrame frame;

    private JTextField textField_1;

    private JTextField textField_2;

    private JTextField textField;

    private JTextField textField_3;

    private JTextField textField_4;

    private JTextField textField_5;

    private JTextField textField_6;

    private JButton button;

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {

            public void run() {

                try {

                    Complex window = new Complex();    //插件自动生成对象，并设置可见性为可见

                    window.frame.setVisible(true);

                } catch (Exception e) {

                    e.printStackTrace();

                }

            }

        });

    }

    /*GUi插件自动生成*/

    public Complex() {

        frame = new JFrame();

        frame.setBounds(100, 100, 709, 377);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().setLayout(new GridLayout(1, 1, 0, 0));

        JPanel panel = new JPanel();

        panel.setBorder(new EmptyBorder(20, 20, 20, 20));

        frame.getContentPane().add(panel);

        panel.setLayout(new GridLayout(4, 5, 20, 20));

        /*public GridLayout(x,y,hgap,vgap) x,y为表格布局的行和列，hgap和vgap为表格元素间的间距*/

        JLabel label = new JLabel("\u590D\u65701\uFF1A");

        label.setFont(new Font("宋体", Font.BOLD, 19));

        label.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label);

        textField_1 = new JTextField();

        textField_1.setFont(new Font("宋体", Font.BOLD, 18));

        textField_1.setHorizontalAlignment(SwingConstants.CENTER);

        textField_1.setColumns(10);

        panel.add(textField_1);

        JLabel label_1 = new JLabel("+");

        label_1.setFont(new Font("宋体", Font.BOLD, 19));

        label_1.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_1);

        textField_2 = new JTextField();

        textField_2.setFont(new Font("宋体", Font.BOLD, 18));

        textField_2.setHorizontalAlignment(SwingConstants.CENTER);

        textField_2.setColumns(10);

        panel.add(textField_2);

        JLabel label_2 = new JLabel("i");

        label_2.setFont(new Font("宋体", Font.BOLD, 19));

        label_2.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_2);

        JLabel label_3 = new JLabel("\u8FD0\u7B97\u7B26");

        label_3.setFont(new Font("宋体", Font.BOLD, 19));

        label_3.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_3);

        JLabel label_4 = new JLabel("");

        label_4.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_4);

        textField = new JTextField();

        textField.setFont(new Font("宋体", Font.BOLD, 19));

        textField.setHorizontalAlignment(SwingConstants.CENTER);

        textField.setColumns(10);

        panel.add(textField);

        /*

         * TextArea与TextField的最基本区别

         * TextArea可以输入多行文本，

         * TextField只能输入单行文本。

         */

        JLabel label_5 = new JLabel("");

        label_5.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_5);

        JLabel label_6 = new JLabel("");

        panel.add(label_6);

        JLabel label_7 = new JLabel("\u590D\u65702\r\n");

        label_7.setFont(new Font("宋体", Font.BOLD, 19));

        label_7.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_7);

        textField_3 = new JTextField();

        textField_3.setFont(new Font("宋体", Font.BOLD, 18));

        textField_3.setHorizontalAlignment(SwingConstants.CENTER);

        textField_3.setColumns(10);

        panel.add(textField_3);

        JLabel label_8 = new JLabel("+");

        label_8.setFont(new Font("宋体", Font.BOLD, 19));

        label_8.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_8);

        textField_4 = new JTextField();

        textField_4.setFont(new Font("宋体", Font.BOLD, 18));

        textField_4.setHorizontalAlignment(SwingConstants.CENTER);

        textField_4.setColumns(10);

        panel.add(textField_4);

        JLabel label_9 = new JLabel("i");

        label_9.setFont(new Font("宋体", Font.BOLD, 18));

        label_9.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_9);

        button = new JButton("=");

        button.setFont(new Font("宋体", Font.BOLD, 20));

        panel.add(button);

        button.addActionListener(this);

        textField_5 = new JTextField();

        textField_5.setFont(new Font("宋体", Font.BOLD, 18));

        textField_5.setHorizontalAlignment(SwingConstants.CENTER);

        textField_5.setColumns(10);

        panel.add(textField_5);

        JLabel label_11 = new JLabel("+");

        label_11.setFont(new Font("宋体", Font.BOLD, 19));

        label_11.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_11);

        textField_6 = new JTextField();

        textField_6.setFont(new Font("宋体", Font.BOLD, 18));

        textField_6.setHorizontalAlignment(SwingConstants.CENTER);

        textField_6.setColumns(10);

        panel.add(textField_6);

        JLabel label_12 = new JLabel("i");

        label_12.setFont(new Font("宋体", Font.BOLD, 19));

        label_12.setHorizontalAlignment(SwingConstants.CENTER);

        panel.add(label_12);

    }

    /*点击按钮事件*/

    public void actionPerformed(ActionEvent e) {

        //得到输入框的内容

        s1 = textField_1.getText();

        s2 = textField_2.getText();

        s3 = textField_3.getText();

        s4 = textField_4.getText();

        s = textField.getText();

        //字符串转化为数值

        a = Double.parseDouble(s1);

        b = Double.parseDouble(s2);

        c = Double.parseDouble(s3);

        d = Double.parseDouble(s4);

        //选择运算类型：加，减，乘

        switch (s) {

        case "+":

            ans1 = a + b;

            ans2 = c + d;

            break;

        case "-":

            ans1 = a - b;

            ans2 = c - d;

            break;

        case "*":

            ans1 = a*c - b*d;

            ans2 = a*d + b*c;

            break;

        }

        //设置文本框内容

        textField_5.setText(ans1+"");

        textField_6.setText(ans2+"");

    }

}

实验结果：