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("u590Du65701uFF1A"); 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("u8FD0u7B97u7B26"); 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("u590Du65702 "); 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：
