用java做一个窗口

java做窗口的话，需要用swing技术，之后创建JFrame 等组件，即可完成窗口创建工作。

package inter.frameimport java.awt.BorderLayout

import java.awt.event.ActionEvent

import java.awt.event.ActionListenerimport javax.swing.JFrame

import javax.swing.JMenu

import javax.swing.JMenuBar

import javax.swing.JMenuItem

import javax.swing.JOptionPanepublic class MenuTest { /**

* @param args

*/

JFrame frame //定义一个窗口架构

JMenuBar mb//定义窗口的菜单工具栏

JMenu m//定义菜单

JMenuItem mi1//定义菜单的内容

JMenuItem mi2//定义菜单的内容

public MenuTest() {

initFrame()

initAction()

}

public void initFrame() {

frame = new JFrame()

mb = new JMenuBar()

m = new JMenu("学生查询")

mi1 = new JMenuItem("确认")

mi2 = new JMenuItem("取消")m.add(mi1)

m.add(mi2)

mb.add(m)

frame.add(mb, BorderLayout.NORTH)

frame.setSize(300, 300)//设置窗口大小

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)//设置退出时关闭窗口

frame.setVisible(true)//设置窗口可见

} public void initAction() {

mi1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

// 具体实现代码根据实际要求填写

System.out.println("click")

JOptionPane.showMessageDialog(null, "你点击了确定按钮")

}

})

mi2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

// 具体实现代码根据实际要求填写

JOptionPane.showMessageDialog(null, "你点击了取消按钮")

}

})

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

new MenuTest()//执行菜单创建

}}

我试一下硬盘文件存储吧,首先在C盘根目录下创建个login.swing的文件,在里面写上 tom##123&&lydia##123,这个为了方便测试,自己试下吧,我也是没学多久,如果有太2的地方,请联系我...谢谢...

import java.awt.*

import javax.swing.*

import java.io.*

public class LoginTest implements ActionListener{

private JFrame jf

private JLabel l1,l2

private JTextField tf1

private JPasswordField tf2

private JPanel northPanel,centerPanel

private JButton b1,b2

private File file = new File("c:/login.swing")

public LoginTest() {

jf = new JFrame("My First WindowTest")

northPanel = new JPanel(new GridLayout(2,2,10,10))

l1 = new JLabel("用户名:")

tf1 = new JTextField()

l2 = new JLabel("密 码:")

tf2 = new JPasswordField()

northPanel.add(l1)

northPanel.add(tf1)

northPanel.add(l2)

northPanel.add(tf2)

centerPanel = new JPanel()

b1 = new JButton("login")

b2 = new JButton("exit")

centerPanel.add(b1)

centerPanel.add(b2)

b1.addActionListener(this)

b2.addActionListener(this)

jf.add(northPanel)

jf.add(centerPanel,"South")

jf.setSize(200,130)

Dimension size = Toolkit.getDefaultToolkit().getScreenSize()

jf.setLocation(size.width / 2 - jf.getWidth() / 2, size.height / 2 - jf.getHeight() / 2)

jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

jf.setVisible(true)

}

public void actionPerformed(ActionEvent e) {

if(e.getSource().equals(b1)) {

String username = tf1.getText()

String password = String.valueOf(tf2.getPassword())

BufferedReader br = null

try {

FileReader fr = new FileReader(file)

br = new BufferedReader(fr)

String line = "",str = ""

while((line = br.readLine()) != null) {

str += line

}

String[] users = str.split("&&")

for(String user : users) {

String[] userInfo = user.split("##")

if(userInfo[0].equals(username) &&userInfo[1].equals(password)) {

JOptionPane.showMessageDialog(null, "登录成功!")

return

}

}

JOptionPane.showMessageDialog(null, "用户名或密码错误!")

return

} catch (FileNotFoundException e1) {

// TODO Auto-generated catch block

e1.printStackTrace()

} catch (IOException e1) {

// TODO Auto-generated catch block

e1.printStackTrace()

}

} else {

System.exit(0)

}

}

public static void main(String args[]) {

new LoginTest()

}

}

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