swing(一) 博客分类： java SwingJava

/**
 * 
 */
package com.cw.swing;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
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.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class LoginFrame extends JFrame{

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		javax.swing.JFrame jframe = new javax.swing.JFrame();
		jframe.setTitle("登录窗口");
		jframe.setSize(400, 400);

		// 获取工具箱
		Toolkit toolkit = Toolkit.getDefaultToolkit();

		// 获取Dimension对象，包含屏幕信息
		Dimension dimenson = toolkit.getScreenSize();

		// 让frame居中显示
		jframe.setLocation((dimenson.width - jframe.getWidth()) / 2,
				(dimenson.height - jframe.getHeight()) / 2);
		jframe.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

		jframe.setLayout(new BorderLayout());

		JButton btn = new JButton();
		btn.setName("login");
		btn.setText("登录");
		LoginFrame lf = new LoginFrame();
		btn.addActionListener(lf.new btnClass(lf));
		
		JLabel lblName=new JLabel();
		lblName.setName("lblName");
		lblName.setText("用户名:");
		
		 
		
		JLabel lblPass=new JLabel();
		lblPass.setName("lblPass");
		lblPass.setText("密码:");
		
		//JTextField txtName=new JTextField();
		
		JTextField   txtName=new JTextField(20);
		txtName.setName("txtName");
		
		JTextField   txtPass=new JTextField(20);
		txtPass.setName("txtPass");
		//text.setDocument(new NumberLenghtLimitedDmt(7));

		
		
		
		//txtName.setVisible(true);
		//txtName.setName("txtName");

		JPanel panel = new JPanel();
		panel.add(lblName);
		panel.add(txtName);
		 
		panel.add(lblPass);
		panel.add(txtPass);
		//panel.add("asasas",panel);
		panel.add(btn);
		jframe.getContentPane().add(panel);

		jframe.setResizable(false);
		jframe.setVisible(true);

	}

	class btnClass implements ActionListener {

		LoginFrame lf;

		public btnClass(LoginFrame lf) {
			this.lf = lf;
		}

		public void actionPerformed(ActionEvent event) {
			JOptionPane.showMessageDialog(null, "aaa");
			//lf.setVisible(false);
			
			//Main main=new Main();
			//main.setVisible(true);
		}

	}

}