main.java

简单的实现学生信息管理

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package exam6;

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.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
 *
 * @author Administrator
 */
public class Main {

    public static void main(String[] args) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {

                String str1 = "123";
                String str2 = "123";
                final MyJFrame jf = new MyJFrame();
                final JTextField jt1 = new JTextField(15);
                final JTextField jt2 = new JTextField(15);
                final JDialog jd = new JDialog();
                jd.setLayout(new BorderLayout());
                JPanel jp1 = new JPanel();
                jp1.add(new JLabel("学号："));
                jp1.add(jt1);
                JPanel jp2 = new JPanel();
                jp2.add(new JLabel("密码："));
                jp2.add(jt2);
                jd.add(jp1, BorderLayout.NORTH);
                jd.add(jp2, BorderLayout.CENTER);
                JPanel jp3 = new JPanel();
                JButton jb1 = new JButton("确定");
                JButton jb2 = new JButton("取消");
                jp3.add(jb1);
                jp3.add(jb2);
                jd.add(jp3, BorderLayout.SOUTH);
                jd.setSize(300, 140);
                jd.setLocationRelativeTo(jd);
                jf.setVisible(false);
                jd.setVisible(true);
                jb1.addActionListener(new ActionListener() {

                    public void actionPerformed(ActionEvent e) {
                        if (jt1.getText().equals("123") && jt2.getText().equals("123")) {
                           // jf.setPreferredSize(new   Dimension(500,   300));

                            jf.setVisible(true);
                           // jd.setVisible(false);
                            jd.hide();
                        }
                        else {
                            JOptionPane.showMessageDialog(jd, "请输入正确用户名或密码");

                        }
                    }
                });

            }
        });
    }
}