用java设计一个简单的界面可以参考如下实例:
import javax.swing.JFrame//框架import javax.swing.JPanel//面板
import javax.swing.JButton//按钮
import javax.swing.JLabel//标签
import javax.swing.JTextField//文本框
import java.awt.Font//字体
import java.awt.Color//颜色
import javax.swing.JPasswordField//密码框
import java.awt.event.ActionListener//事件监听
import java.awt.event.ActionEvent//事件处理
import javax.swing.JOptionPane//消息窗口public class UserLogIn extends JFrame{
public JPanel pnluser
public JLabel lbluserLogIn
public JLabel lbluserName
public JLabel lbluserPWD
public JTextField txtName
public JPasswordField pwdPwd
public JButton btnSub
public JButton btnReset
public UserLogIn(){
pnluser = new JPanel()
lbluserLogIn = new JLabel()
lbluserName = new JLabel()
lbluserPWD = new JLabel()
txtName = new JTextField()
pwdPwd = new JPasswordField()
btnSub = new JButton()
btnReset = new JButton()
userInit()
}
public void userInit(){
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)//设置关闭框架的同时结束程序
this.setSize(300,200)//设置框架大小为长300,宽200
this.setResizable(false)//设置框架不可以改变大小
this.setTitle("用户登录")//设置框架标题
this.pnluser.setLayout(null)//设置面板布局管理
this.pnluser.setBackground(Color.cyan)//设置面板背景颜色
this.lbluserLogIn.setText("用户登录")//设置标签标题
this.lbluserLogIn.setFont(new Font("宋体",Font.BOLD | Font.ITALIC,14))//设置标签字体
this.lbluserLogIn.setForeground(Color.RED)//设置标签字体颜色
this.lbluserName.setText("用户名:")
this.lbluserPWD.setText("密 码:")
this.btnSub.setText("登录")
this.btnReset.setText("重置")
this.lbluserLogIn.setBounds(120,15,60,20)//设置标签x坐标120,y坐标15,长60,宽20
this.lbluserName.setBounds(50,55,60,20)
this.lbluserPWD.setBounds(50,85,60,25)
this.txtName.setBounds(110,55,120,20)
this.pwdPwd.setBounds(110,85,120,20)
this.btnSub.setBounds(85,120,60,20)
this.btnSub.addActionListener(new ActionListener()//匿名类实现ActionListener接口
{
public void actionPerformed(ActionEvent e){
btnsub_ActionEvent(e)
}
}
)
this.btnReset.setBounds(155,120,60,20)
this.btnReset.addActionListener(new ActionListener()//匿名类实现ActionListener接口
{
public void actionPerformed(ActionEvent e){
btnreset_ActionEvent(e)
}
}
)
this.pnluser.add(lbluserLogIn)//加载标签到面板
this.pnluser.add(lbluserName)
this.pnluser.add(lbluserPWD)
this.pnluser.add(txtName)
this.pnluser.add(pwdPwd)
this.pnluser.add(btnSub)
this.pnluser.add(btnReset)
this.add(pnluser)//加载面板到框架
this.setVisible(true)//设置框架可显
}
public void btnsub_ActionEvent(ActionEvent e){
String name = txtName.getText()
String pwd = String.valueOf(pwdPwd.getPassword())
if(name.equals("")){
JOptionPane.showMessageDialog(null,"账号不能为空","错误",JOptionPane.ERROR_MESSAGE)
return
}else if (pwd.equals("")){
JOptionPane.showMessageDialog(null,"密码不能为空","错误",JOptionPane.ERROR_MESSAGE)
return
}else if(true){
this.dispose()
}else{
JOptionPane.showMessageDialog(null,"账号或密码错误","错误",JOptionPane.ERROR_MESSAGE)
return
}
}
public void btnreset_ActionEvent(ActionEvent e){
txtName.setText("")
pwdPwd.setText("")
}
public static void main(String[] args){
new UserLogIn()
}
}
import javax.swing.*
import java.awt.*
public class Frame extends JFrame {
public static void main(String[] args) {
new Frame()
}
public Frame() throws HeadlessException {
Container contentPanel = this.getContentPane()
JPanel headerPanel = new JPanel()
headerPanel.setLayout(new FlowLayout())
headerPanel.add(new JLabel("欢迎进入学生成绩管理系统"))
JPanel centerPanel = new JPanel()
centerPanel.setLayout(new GridLayout(2, 2))
centerPanel.add(new JLabel("用户名", JLabel.CENTER))
centerPanel.add(new JTextField())
centerPanel.add(new JLabel("密码", JLabel.CENTER))
centerPanel.add(new JTextField())
JPanel footerPanel = new JPanel()
footerPanel.setLayout(new FlowLayout())
footerPanel.add(new JButton("登录"))
footerPanel.add(new JButton("取消"))
contentPanel.add(headerPanel, BorderLayout.NORTH)
contentPanel.add(centerPanel, BorderLayout.CENTER)
contentPanel.add(footerPanel, BorderLayout.SOUTH)
this.setTitle("Login")
this.setBounds(0, 0, 300, 200)
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
this.setVisible(true)
}
}
1, 分析业务需求, 理顺业务逻辑2, 根据业务需要考虑使用何种容器(JFrame ,Frame ,JWindow..) 需要的数量.
3, 每个容器(窗口)使用组件
4.组件使用何种布局方式(边界布局,绝对布局,网格布局..),排列在容器(窗口)中
5.组件中需要响应那些事件, 把事件响应代码写好,然后绑定到组件上(addListener...)
6.调试,测试