使用java组件做一个复数计算器

首先，建三个类：一个组件类，一个类(将文本框与字符封装起来)，一个复数类。下面是组件类的代码：

package b;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

public class JComplex extends JFrame implements ActionListener{

//设置组件

public JComboBox combox_add,combox_minus;

private static String[] add={"+","-"};

private static String[] minus={"+","-"};

private JButton button_equal;

//建面板类的对象

ComJPanel x1=new ComJPanel();

ComJPanel x2=new ComJPanel();

ComJPanel x3=new ComJPanel();

ComJPanel result=new ComJPanel();

public JComplex()

{

super("复数运算器");

this.setLayout(null);

this.setSize(400,220);

this.setLocationRelativeTo(null);

//添加组件

this.add(this.combox_add=new JComboBox(JComplex.add));

this.add(this.combox_minus=new JComboBox(JComplex.minus));

this.add(this.button_equal=new JButton("="));

this.add(x1);

this.add(x2);

this.add(x3);

this.add(result);

//设置组件的距离和大小

combox_add.setBounds(20, 70, 60, 30);

combox_minus.setBounds(20, 110, 60, 30);

button_equal.setBounds(20, 150, 60, 30);

x1.setBounds(100, 5, 300, 50);

x2.setBounds(100, 50, 300, 50);

x3.setBounds(100, 100, 300, 50);

result.setBounds(100, 150, 300, 50);

//设置动作监听

combox_add.addActionListener(this);

combox_minus.addActionListener(this);

button_equal.addActionListener(this);

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

this.setVisible(true);

}

public void actionPerformed(ActionEvent e)

{//获取文本框的内容

String s1=x1.text_real.getText();

String s2=x1.text_i.getText();

String s3=x2.text_real.getText();

String s4=x2.text_i.getText();

String s5=x3.text_real.getText();

String s6=x3.text_i.getText();

//建复数类的对象

Complex c1=new Complex(s1,s2);

Complex c2=new Complex(s3,s4);

Complex c3=new Complex(s5,s6);

//动作响应

if(e.getSource().equals(combox_add))

{

if(combox_add.getSelectedItem().equals("+"))

combox_add.setSelectedItem("+");

else if(combox_add.getSelectedItem().equals("-"))

combox_add.getSelectedItem().equals("-");

}

if(e.getSource().equals(combox_minus))

{

if(combox_minus.getSelectedItem().equals("+"))

combox_minus.setSelectedItem("+");

else if(combox_minus.getSelectedItem().equals("-"))

combox_minus.setSelectedItem("-");

}

if(e.getSource().equals(button_equal))

{

if(combox_add.getSelectedItem().equals("+"))

{

c1.add(c2);

}

else if(combox_add.getSelectedItem().equals("-"))

{

c1.minus(c2);

}

if(combox_minus.getSelectedItem().equals("+"))

{

c1.add(c3);

}

else if(combox_minus.getSelectedItem().equals("-"))

{

c1.minus(c3);

}

}

result.text_real.setText(Double.toString(c1.x));

result.text_i.setText(Double.toString(c1.y));

}

public static void main(String []args)

{

new JComplex();

}

}

class ComJPanel extends JPanel {

private JLabel label_add,label_i;

JTextField text_real,text_i;

String s1,s2;

public ComJPanel()

{//面板类

this.setLayout(null);

this.add(this.text_real=new JTextField());

this.add(this.label_add=new JLabel("+"));

this.add(this.text_i=new JTextField());

this.add(this.label_i=new JLabel("i"));

text_real.setBounds(20,0,100,30);

text_i.setBounds(150,0,100, 30);

label_add.setBounds(130,0,20, 25);

label_i.setBounds(260,0,20, 25);

}

}

复数类就是简单的复数类，就不贴代码啦