stuframe.java

课程设计－－ 学生成绩管理系统。。用NetBeans编写

/*
 * StuFrame.java
 *
 * Created on 2005年10月29日, 上午8:41
 *
 * @author Liuyi
 */
import javax.swing.*;
import java.awt.*;

public class StuFrame extends javax.swing.JFrame {
    
    /** 初始化 */
    public StuFrame() {
        initComponents();
        list.setListData(students.stuList.toArray());
        Toolkit kit= Toolkit.getDefaultToolkit();
        Dimension screenSize=kit.getScreenSize();
        setLocation((screenSize.width-getSize().width)/2,(screenSize.height-getSize().height)/2);
        setTitle("学生成绩管理系统");
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jPanel4 = new javax.swing.JPanel();
        list = new javax.swing.JList();
        jPanel2 = new javax.swing.JPanel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jLabel1 = new javax.swing.JLabel();
        txtID = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        txtName = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        txtScore = new javax.swing.JTextField();
        jPanel3 = new javax.swing.JPanel();
        btnAdd = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        btnSort = new javax.swing.JButton();
        btnStat = new javax.swing.JButton();
        btnSeek = new javax.swing.JButton();
        btnAvg = new javax.swing.JButton();

        getContentPane().setLayout(new java.awt.BorderLayout(3, 3));

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        list.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
        list.setPreferredSize(new java.awt.Dimension(180, 300));
        list.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                listMouseClicked(evt);
            }
        });

        getContentPane().add(list, java.awt.BorderLayout.WEST);

        jPanel2.setLayout(new java.awt.GridLayout(5, 0, 30, 10));

        jPanel2.setBorder(new javax.swing.border.SoftBevelBorder(javax.swing.border.BevelBorder.LOWERED));
        jLabel4.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
        jLabel4.setText("<-\u9009\u62e9\u67e5\u770b\u5b66\u751f\u4fe1\u606f");
        jPanel2.add(jLabel4);

        jLabel5.setText("\u7f16\u8f91\u5b66\u751f\u4fe1\u606f\uff1a");
        jPanel2.add(jLabel5);

        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel1.setText("\u5b66\u53f7\uff1a");
        jPanel2.add(jLabel1);

        jPanel2.add(txtID);

        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel2.setText("\u59d3\u540d\uff1a");
        jPanel2.add(jLabel2);

        jPanel2.add(txtName);

        jLabel3.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel3.setText("\u6210\u7ee9\uff1a");
        jPanel2.add(jLabel3);

        txtScore.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                txtScoreKeyPressed(evt);
            }
        });

        jPanel2.add(txtScore);

        getContentPane().add(jPanel2, java.awt.BorderLayout.CENTER);

        jPanel3.setPreferredSize(new java.awt.Dimension(10, 50));
        btnAdd.setText("\u65b0\u589e");
        btnAdd.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnAddActionPerformed(evt);
            }
        });

        jPanel3.add(btnAdd);

        btnDelete.setText("\u5220\u9664");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        jPanel3.add(btnDelete);

        btnSort.setText("\u6392\u5e8f");
        btnSort.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSortActionPerformed(evt);
            }
        });

        jPanel3.add(btnSort);

        btnStat.setText("\u7edf\u8ba1");
        btnStat.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnStatActionPerformed(evt);
            }
        });

        jPanel3.add(btnStat);

        btnSeek.setText("\u67e5\u8be2");
        btnSeek.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSeekActionPerformed(evt);
            }
        });

        jPanel3.add(btnSeek);

        btnAvg.setText("\u5e73\u5747\u5206");
        btnAvg.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnAvgActionPerformed(evt);
            }
        });

        jPanel3.add(btnAvg);

        getContentPane().add(jPanel3, java.awt.BorderLayout.SOUTH);

        pack();
    }
    // </editor-fold>//GEN-END:initComponents
    
    private void txtScoreKeyPressed(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtScoreKeyPressed
        // 修改成绩直接输入数字，按回车键：
        if (evt.getKeyCode()==10){
            if (students.seek(txtID.getText())!=null) {
                try {
                    students.setScore(txtID.getText(),Float.parseFloat(txtScore.getText()));
                    list.setListData(students.stuList.toArray());
                } catch (NumberFormatException e){
                    JOptionPane.showConfirmDialog(this,"输入格式错误！","操作提示",JOptionPane.DEFAULT_OPTION,JOptionPane.INFORMATION_MESSAGE);
                    txtScore.setText("0.0");
                }
            }
        };
    }//GEN-LAST:event_txtScoreKeyPressed
    
    private void btnAvgActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnAvgActionPerformed
        // 调用对话框显示平均成绩：
        JOptionPane.showConfirmDialog(this,"平均分数:"+students.averageScore(),"查询结果",JOptionPane.DEFAULT_OPTION,JOptionPane.INFORMATION_MESSAGE);
    }//GEN-LAST:event_btnAvgActionPerformed
    
    private void listMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_listMouseClicked
        // 单击列表项选择查看学生信息：
        Student theStudent=(Student)(list.getSelectedValue());
        txtID.setText(theStudent.ID);
        txtName.setText(theStudent.name);
        txtScore.setText(String.valueOf(theStudent.score));
    }//GEN-LAST:event_listMouseClicked
    
    private void btnStatActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnStatActionPerformed
        // 统计成绩分布，调用成绩分布对话框，图文并茂显示结果：
        students.stat(statArr);
        stat=new Stat(this);
        stat.setVisible(true);
    }//GEN-LAST:event_btnStatActionPerformed
    
    private void btnSeekActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnSeekActionPerformed
        // 调用查询成绩对话框，输入学号查询成绩
        String id=JOptionPane.showInputDialog("要查询学生的成绩，请输入学号：");
        Student theStudent=students.seek(id);
        if ( theStudent == null ) {JOptionPane.showConfirmDialog(this,"查无此人！","查询结果",JOptionPane.DEFAULT_OPTION,JOptionPane.INFORMATION_MESSAGE);} else {
            txtID.setText(theStudent.ID);
            txtName.setText(theStudent.name);
            txtScore.setText(String.valueOf(theStudent.score));
        }
    }//GEN-LAST:event_btnSeekActionPerformed
    
    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnDeleteActionPerformed
        // 删除一条学生记录：
        students.deleteStudent(txtID.getText());
        txtID.setText("");
        txtName.setText("");
        txtScore.setText(String.valueOf(0));
        list.setListData(students.stuList.toArray());
    }//GEN-LAST:event_btnDeleteActionPerformed
    
    private void btnSortActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnSortActionPerformed
        // 按照成绩排序：
        students.sortByScore();
        list.setListData(students.stuList.toArray());
    }//GEN-LAST:event_btnSortActionPerformed
    
    private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnAddActionPerformed
        // 新增一条学生记录：：
        if (!txtID.getText().equals("")){
            try {
                students.addStudent(txtID.getText(),txtName.getText(),Float.parseFloat(txtScore.getText()));
                list.setListData(students.stuList.toArray());
            } catch (NumberFormatException e){
                JOptionPane.showConfirmDialog(this,"输入格式错误！","操作提示",JOptionPane.DEFAULT_OPTION,JOptionPane.INFORMATION_MESSAGE);
                txtScore.setText("0.0");
            }
            
        }
    }//GEN-LAST:event_btnAddActionPerformed
    
    /**
     * 运行入口
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StuFrame().setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JButton btnAdd;
    private javax.swing.JButton btnAvg;
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnSeek;
    private javax.swing.JButton btnSort;
    private javax.swing.JButton btnStat;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JList list;
    private javax.swing.JTextField txtID;
    private javax.swing.JTextField txtName;
    private javax.swing.JTextField txtScore;
    // 变量声明结束//GEN-END:variables
    
    public float[] statArr=new float[4];
    private Students students=new Students();
    private Stat stat=null;
}