数字的加减乘除代码,Java代码库,德仔网

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【Java】数字的加减乘除
作者:彧福 / 发布于2015/5/11/ 749

	package cn.imust.p2;
	
	import java.awt.BorderLayout;
	import java.awt.Cursor;
	import java.awt.FlowLayout;
	import java.awt.Font;
	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	
	import javax.swing.JButton;
	import javax.swing.JFrame;
	import javax.swing.JLabel;
	import javax.swing.JPanel;
	import javax.swing.JTextField;
	
	public class Exercise16_4 extends JFrame{
	
	 private JTextField jtfNumber1 = new JTextField();
	 private JTextField jtfNumber2 = new JTextField();
	 private JTextField jtfResult = new JTextField();
	
	 public Exercise16_4(){
	 JPanel p1 = new JPanel(new FlowLayout(FlowLayout.CENTER));
	 jtfNumber1.setColumns(5);
	 jtfNumber2.setColumns(5);
	 jtfResult.setColumns(8);
	 p1.add(new JLabel("Number1"));
	 p1.add(jtfNumber1);
	 p1.add(new JLabel("Number2"));
	 p1.add(jtfNumber2);
	 p1.add(new JLabel("Result"));
	 p1.add(jtfResult);
	 JPanel p2 = new JPanel(new FlowLayout(FlowLayout.CENTER));
	 JButton jbtAdd = new JButton("Add");
	 jbtAdd.setCursor(new Cursor(Cursor.HAND_CURSOR));
	 jbtAdd.setFont(new Font("TimesRoman",Font.BOLD,16));
	 jbtAdd.setText("<html><u>A</u>dd</html>");
	 JButton jbtSubtract = new JButton("Substract");
	 jbtSubtract.setCursor(new Cursor(Cursor.HAND_CURSOR));
	 jbtSubtract.setFont(new Font("TimesRoman",Font.BOLD,16));
	 jbtSubtract.setText("<html><u>S</u>ubtract</html>");
	 JButton jbtMultiply = new JButton("Multiply");
	 jbtMultiply.setCursor(new Cursor(Cursor.HAND_CURSOR));
	 jbtMultiply.setFont(new Font("TimesRoman",Font.BOLD,16));
	 jbtMultiply.setText("<html><u>M</u>ultiply</html>");
	 JButton jbtDivide = new JButton("Divide");
	 jbtDivide.setCursor(new Cursor(Cursor.HAND_CURSOR));
	 jbtDivide.setFont(new Font("TimesRoman",Font.BOLD,16));
	 jbtDivide.setText("<html><u>D</u>ivide</html>");
	 p2.add(jbtAdd);
	 p2.add(jbtSubtract);
	 p2.add(jbtMultiply);
	 p2.add(jbtDivide);
	
	 jbtAdd.addActionListener(new ActionListener() {
	
	 public void actionPerformed(ActionEvent e) {
	
	 double number1 = Double.parseDouble(jtfNumber1.getText());
	 double number2 = Double.parseDouble(jtfNumber2.getText());
	 jtfResult.setText(String.format("%.2f", new Double[]{new Double(number1+number2)}));
	 }
	 });
	
	 jbtSubtract.addActionListener(new ActionListener() {
	
	 public void actionPerformed(ActionEvent e) {
	
	 double number1 = Double.parseDouble(jtfNumber1.getText());
	 double number2 = Double.parseDouble(jtfNumber2.getText());
	 jtfResult.setText(String.format("%.2f", new Double[]{new Double(number1-number2)}));
	 }
	 });
	
	 jbtMultiply.addActionListener(new ActionListener() {
	
	 public void actionPerformed(ActionEvent e) {
	
	 double number1 = Double.parseDouble(jtfNumber1.getText());
	 double number2 = Double.parseDouble(jtfNumber2.getText());
	 jtfResult.setText(String.format("%.2f", new Double[]{new Double(number1*number2)}));
	 }
	 });
	
	 jbtDivide.addActionListener(new ActionListener() {
	
	 public void actionPerformed(ActionEvent e) {
	 double number1 = Double.parseDouble(jtfNumber1.getText());
	 double number2 = Double.parseDouble(jtfNumber2.getText());
	 jtfResult.setText(String.format("%.2f", new Double[]{new Double(number1/number2)}));
	
	 }
	 });
	
	 setLayout(new BorderLayout());
	 add(p1,BorderLayout.CENTER);
	 add(p2,BorderLayout.SOUTH);
	 }
	
	 public static void main(String[] args) {
	
	 JFrame frame = new Exercise16_4();
	 frame.setTitle("Exercise16_4");
	 frame.setSize(500, 200);
	 frame.setLocationRelativeTo(null);
	 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	 frame.setVisible(true);
	 }
	
	
	}
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