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用java Swing做的？給你個代碼，還有運行結果圖

package?my.test.main;

import?java.awt.BorderLayout;

import?java.awt.EventQueue;

import?java.awt.event.ActionEvent;

import?java.awt.event.ActionListener;

import?java.awt.event.ComponentEvent;

import?java.awt.event.ComponentListener;

import?java.awt.event.KeyAdapter;

import?java.awt.event.KeyEvent;

import?java.awt.event.KeyListener;

import?javax.swing.JFrame;

import?javax.swing.JPanel;

import?javax.swing.SwingUtilities;

import?javax.swing.border.EmptyBorder;

import?javax.swing.event.AncestorEvent;

import?javax.swing.event.AncestorListener;

import?javax.swing.event.CaretEvent;

import?javax.swing.event.CaretListener;

import?javax.swing.JLabel;

import?javax.swing.JTextField;

public?class?Purchase?extends?JFrame?{

private?JPanel?contentPane;

private?JTextField?textField;

private?JTextField?textField_1;

private?JTextField?textField_2;

private?JTextField?textField_3;

private?JTextField?textField_4;

private?JLabel?label_9;

/**

*?Launch?the?application.

*/

public?static?void?main(String[]?args)?{

e69da5e6ba9062616964757a686964616f31333361303539EventQueue.invokeLater(new?Runnable()?{

public?void?run()?{

try?{

Purchase?frame?=?new?Purchase();

frame.setVisible(true);

}?catch?(Exception?e)?{

e.printStackTrace();

}

}

});

}

/**

*?Create?the?frame.

*/

public?Purchase()?{

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100,?100,?450,?300);

contentPane?=?new?JPanel();

contentPane.setBorder(new?EmptyBorder(5,?5,?5,?5));

setContentPane(contentPane);

contentPane.setLayout(null);

JLabel?label?=?new?JLabel("\u5546\u54C11");

label.setBounds(56,?40,?54,?15);

contentPane.add(label);

JLabel?label_1?=?new?JLabel("\u5546\u54C12");

label_1.setBounds(56,?70,?54,?15);

contentPane.add(label_1);

JLabel?label_2?=?new?JLabel("\u5546\u54C13");

label_2.setBounds(56,?100,?54,?15);

contentPane.add(label_2);

JLabel?label_3?=?new?JLabel("\u5546\u54C14");

label_3.setBounds(56,?130,?54,?15);

contentPane.add(label_3);

JLabel?label_4?=?new?JLabel("\u5546\u54C15");

label_4.setBounds(56,?160,?54,?15);

contentPane.add(label_4);

JLabel?label_5?=?new?JLabel("\u5546\u54C1\u540D\u79F0");

label_5.setBounds(56,?7,?54,?15);

contentPane.add(label_5);

JLabel?label_6?=?new?JLabel("單價");

label_6.setBounds(179,?7,?54,?15);

contentPane.add(label_6);

JLabel?label_7?=?new?JLabel("數量");

label_7.setBounds(307,?7,?54,?15);

contentPane.add(label_7);

JLabel?label_8?=?new?JLabel("總價");

label_8.setBounds(145,?224,?54,?15);

contentPane.add(label_8);

label_9?=?new?JLabel("0");

label_9.setBounds(209,?224,?54,?15);

contentPane.add(label_9);

JLabel?label_10?=?new?JLabel("10");

label_10.setBounds(185,?40,?54,?15);

contentPane.add(label_10);

JLabel?label_11?=?new?JLabel("20");

label_11.setBounds(185,?70,?54,?15);

contentPane.add(label_11);

JLabel?label_12?=?new?JLabel("30");

label_12.setBounds(185,?100,?54,?15);

contentPane.add(label_12);

JLabel?label_13?=?new?JLabel("40");

label_13.setBounds(185,?130,?54,?15);

contentPane.add(label_13);

JLabel?label_14?=?new?JLabel("50");

label_14.setBounds(185,?160,?54,?15);

contentPane.add(label_14);

textField?=?new?JTextField();

textField.setBounds(295,?37,?66,?21);

contentPane.add(textField);

textField.setColumns(10);

textField.addKeyListener(new?CalcTotle());

textField_1?=?new?JTextField();

textField_1.setColumns(10);

textField_1.setBounds(295,?67,?66,?21);

contentPane.add(textField_1);

textField_1.addKeyListener(new?CalcTotle());

textField_2?=?new?JTextField();

textField_2.setColumns(10);

textField_2.setBounds(295,?97,?66,?21);

contentPane.add(textField_2);

textField_2.addKeyListener(new?CalcTotle());

textField_3?=?new?JTextField();

textField_3.setColumns(10);

textField_3.setBounds(295,?127,?66,?21);

contentPane.add(textField_3);

textField_3.addKeyListener(new?CalcTotle());

textField_4?=?new?JTextField();

textField_4.setColumns(10);

textField_4.setBounds(295,?157,?66,?21);

contentPane.add(textField_4);

textField_4.addKeyListener(new?CalcTotle());

}

class?CalcTotle?extends?KeyAdapter?{

@Override

public?void?keyReleased(KeyEvent?e)?{

//?TODO?Auto-generated?method?stub

int?count1,?count2,?count3,?count4,?count5;

if?(!textField.getText().isEmpty())?{

count1?=?Integer.parseInt(textField.getText())?*?10;

}?else?{

count1?=?0;

}

if?(!textField_1.getText().isEmpty())?{

count2?=?Integer.parseInt(textField_1.getText())?*?20;

}?else?{

count2?=?0;

}

if?(!textField_2.getText().isEmpty())?{

count3?=?Integer.parseInt(textField_2.getText())?*?30;

}?else?{

count3?=?0;

}

if?(!textField_3.getText().isEmpty())?{

count4?=?Integer.parseInt(textField_3.getText())?*?40;

}?else?{

count4?=?0;

}

if?(!textField_4.getText().isEmpty())?{

count5?=?Integer.parseInt(textField_4.getText())?*?50;

}?else?{

count5?=?0;

}

final?int?totle?=?count1?+?count2?+?count3?+?count4?+?count5;

SwingUtilities.invokeLater(new?Runnable()?{

@Override

public?void?run()?{

//?TODO?Auto-generated?method?stub

label_9.setText(totle?+?"");

}

});

}

}

}

總結

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