Java編寫能完成復數運算的程序

Java編寫能完成復數運算的程序

題目簡介：

整體分析：

界面分析：

實驗代碼：

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為運算符號，s1,s3為兩個虛數的實部，s2,s4為兩個虛數的虛部
    double a,b,c,d,ans1,ans2;    //對應的字符串轉化為數值后：a,c為兩個虛數的實部，b,d為兩個虛數的虛部
                                //ans1，ans2為計算結果
    
    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();    //插件自動生成對象，並設置可見性為可見
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /*GUi插件自動生成*/
    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為表格布局的行和列，hgap和vgap為表格元素間的間距*/
        
        JLabel label = new JLabel("\u590D\u65701\uFF1A");
        label.setFont(new Font("宋體", Font.BOLD, 19));
        label.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label);
        
        textField_1 = new JTextField();
        textField_1.setFont(new Font("宋體", 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("宋體", Font.BOLD, 19));
        label_1.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label_1);
        
        textField_2 = new JTextField();
        textField_2.setFont(new Font("宋體", 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("宋體", 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("宋體", 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("宋體", Font.BOLD, 19));
        textField.setHorizontalAlignment(SwingConstants.CENTER);
        textField.setColumns(10);
        panel.add(textField);
        /*
         * TextArea與TextField的最基本區別
         * TextArea可以輸入多行文本， 
         * TextField只能輸入單行文本。
         */

        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("宋體", Font.BOLD, 19));
        label_7.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label_7);
        
        textField_3 = new JTextField();
        textField_3.setFont(new Font("宋體", 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("宋體", Font.BOLD, 19));
        label_8.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label_8);
        
        textField_4 = new JTextField();
        textField_4.setFont(new Font("宋體", 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("宋體", Font.BOLD, 18));
        label_9.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label_9);
        
        button = new JButton("=");
        button.setFont(new Font("宋體", Font.BOLD, 20));
        panel.add(button);
        button.addActionListener(this);
        
        textField_5 = new JTextField();
        textField_5.setFont(new Font("宋體", 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("宋體", Font.BOLD, 19));
        label_11.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label_11);
        
        textField_6 = new JTextField();
        textField_6.setFont(new Font("宋體", 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("宋體", Font.BOLD, 19));
        label_12.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label_12);
    }

    /*點擊按鈕事件*/
    public void actionPerformed(ActionEvent e) {
        //得到輸入框的內容
        s1 = textField_1.getText();
        s2 = textField_2.getText();
        s3 = textField_3.getText();
        s4 = textField_4.getText();
        s = textField.getText();
        //字符串轉化為數值
        a = Double.parseDouble(s1);
        b = Double.parseDouble(s2);
        c = Double.parseDouble(s3);
        d = Double.parseDouble(s4);
        //選擇運算類型：加，減，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;
        }
        //設置文本框內容
        textField_5.setText(ans1+"");
        textField_6.setText(ans2+"");
        
    }

}

 實驗結果：