Java 复数的加、减及乘法运算

Java 复数的加、减及乘法运算

界面的设计 监听器的实现 测试

界面的设计

咱先来看看界面效果：

话不多说，直接上代码：

JFrame jframe; JPanel jpanel1,jpanel2,jpanel3,jpanel4; JButton jbutton; Container container; JLabel jlabel1,jlabel2,jlabel3,jlabel4,jl1,jl2,jlabel5,jla5,jlab5,j1,j2,j3; JTextField jtextfield1,jtextfield2,jtextfield3,jtextfield4,jtextfield5; JTextArea jtextarea1,jtextarea2; public complexFrame() { jframe = new JFrame("复数计算");//标题 jframe.setBounds(1200,200,600,400);//界面大小和位置 container = jframe.getContentPane(); jframe.addWindowListener(new WindowAdapter() {//关闭窗口 public void windowClosing(WindowEvent e) { System.exit(0); } }); jbutton = new JButton("="); jbutton.setFont(new Font("",1,30));//设置字体大小 jlabel1 = new JLabel("复数1:"); jlabel1.setFont(new Font("",1,30));//设置字体大小 jlabel1.setHorizontalAlignment(JLabel.CENTER);//居中显示 jlabel2 = new JLabel("运算符:"); jlabel2.setFont(new Font("",1,30));//设置字体大小 jlabel2.setHorizontalAlignment(JLabel.CENTER);//居中显示 jlabel3 = new JLabel("复数2:"); jlabel3.setFont(new Font("",1,30));//设置字体大小 jlabel3.setHorizontalAlignment(JLabel.CENTER);//居中显示 jlabel4 = new JLabel("+"); jlabel4.setFont(new Font("",1,30));//设置字体大小 jlabel4.setHorizontalAlignment(JLabel.CENTER);//居中显示 jl1 = new JLabel("+"); jl1.setFont(new Font("",1,30));//设置字体大小 jl1.setHorizontalAlignment(JLabel.CENTER);//居中显示 jl2 = new JLabel("+"); jl2.setFont(new Font("",1,30));//设置字体大小 jl2.setHorizontalAlignment(JLabel.CENTER); //居中显示 jlabel5 = new JLabel("i"); jlabel5.setFont(new Font("",1,30));//设置字体大小 jlabel5.setHorizontalAlignment(JLabel.CENTER);//居中显示 jla5 = new JLabel("i"); jla5.setFont(new Font("",1,30));//设置字体大小 jla5.setHorizontalAlignment(JLabel.CENTER); //居中显示 jlab5 = new JLabel("i"); jlab5.setFont(new Font("",1,30));//设置字体大小 jlab5.setHorizontalAlignment(JLabel.CENTER);//居中显示 j1 = new JLabel();//为了调整界面设的空标签 j2 = new JLabel();//为了调整界面设的空标签 j3 = new JLabel();//为了调整界面设的空标签 jtextfield1 = new JTextField(100); jtextfield1.setFont(new Font("",1,30));//设置字体大小 jtextfield1.setHorizontalAlignment(JTextField.CENTER);//输入的字符居中显示 jtextfield2 = new JTextField(); jtextfield2.setFont(new Font("",1,30));//设置字体大小 jtextfield2.setHorizontalAlignment(JTextField.CENTER);//输入的字符居中显示 jtextfield3 = new JTextField(); jtextfield3.setFont(new Font("",1,30));//设置字体大小 jtextfield3.setHorizontalAlignment(JTextField.CENTER);//输入的字符居中显示 jtextfield4 = new JTextField(); jtextfield4.setFont(new Font("",1,30));//设置字体大小 jtextfield4.setHorizontalAlignment(JTextField.CENTER);//输入的字符居中显示 jtextfield5 = new JTextField(); jtextfield5.setFont(new Font("",1,30));//设置字体大小 jtextfield5.setHorizontalAlignment(JTextField.CENTER);//输入的字符居中显示 jtextarea1 = new JTextArea(); jtextarea1.setFont(new Font("",1,30));//设置字体大小 jtextarea2 = new JTextArea(); jtextarea2.setFont(new Font("",1,30));//设置字体大小 jpanel1 = new JPanel(); jpanel2 = new JPanel(); jpanel3 = new JPanel(); jpanel4 = new JPanel(); jpanel1.setLayout(new GridLayout(1,5)); jpanel1.add(jlabel1);jpanel1.add(jtextfield1);jpanel1.add(jl1);jpanel1.add(jtextfield2);jpanel1.add(jla5); jpanel2.setLayout(new GridLayout(1,5)); jpanel2.add(jlabel2);jpanel2.add(j1);jpanel2.add(jtextfield3);jpanel2.add(j2);jpanel2.add(j3); jpanel3.setLayout(new GridLayout(1,5)); jpanel3.add(jlabel3);jpanel3.add(jtextfield4);jpanel3.add(jl2);jpanel3.add(jtextfield5);jpanel3.add(jlab5); jpanel4.setLayout(new GridLayout(1,5)); jpanel4.add(jbutton);jpanel4.add(jtextarea1);jpanel4.add(jlabel4);jpanel4.add(jtextarea2);jpanel4.add(jlabel5); container.setLayout(new GridLayout(4,1)); container.add(jpanel1); container.add(jpanel2); container.add(jpanel3); container.add(jpanel4); jframe.setVisible(true); jbutton.addActionListener(this);//给“=”按钮建立监听器

监听器的实现

public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub if(e.getSource()==jbutton) { int x,y,a,b; x = new Integer(jtextfield1.getText()); a = new Integer(jtextfield2.getText()); String s = jtextfield3.getText(); y = new Integer(jtextfield4.getText()); b = new Integer(jtextfield5.getText()); if(s.equals("+"))//做加法运算 { jtextarea1.setText(String.valueOf(x+y)); jtextarea2.setText(String.valueOf(a+b)); } else if(s.equals("-"))//做减法运算 { jtextarea1.setText(String.valueOf(x-y)); jtextarea2.setText(String.valueOf(a-b)); } else if(s.equals("*"))//做乘法运算 { jtextarea1.setText(String.valueOf(x*y-a*b)); jtextarea2.setText(String.valueOf(x*b+y*a)); } else { //不做任何操作 } } else { //不做任何操作 } }

测试

public class complexTest { public static void main(String[] args) { // TODO Auto-generated method stub new complexFrame(); } }