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从 My Sql 检索 JCombobox 值

发布于 2024-12-24 21:45:14 字数 13271 浏览 4 评论 0原文

我使用以下代码从 mysql 学生数据库检索数据。它工作正常。它将在组合框中显示学生姓名。该值是从数据库检索的。

我的问题是 Jcombobox 名称字段中自动显示的第一个值（存储在数据库列中的第一个学生姓名），当我单击组合框箭头时显示。这意味着当我执行以下代码时，我看到第一个值（名字）在组合框的名称字段中箭头附近。但我需要在那里的“学生姓名”标题。如果我分配该设计时间，但当我单击该箭头时再次显示相同的名称。如何解决这个问题？

我的另一个问题是当我输入组合框的名称字段时如何选择“组合框项目”。这意味着如果我输入 S 意味着选择以 S 开头的组合框项目。

package designstudent;
import java.awt.*;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.*;
import javax.swing.table.DefaultTableModel;
import java.sql.*;
import javax.swing.JOptionPane;
import javax.swing.ListSelectionModel;
import javax.swing.*;



public class FrmeA extends javax.swing.JFrame  {

    FrmA1 f1=new FrmA1();
    Statement TmpFlxTSt=null;
    ResultSet TmpFlxTRs=null;
    GContnStr GCS=new GContnStr();

public FrmeA() {
    initComponents();
}

public void combo() {

    try {
        GCS.GContnStr();
        TmpFlxTSt= GCS.GCotnStr.createStatement();
        String select = "Select StudName from studentmaster";
        TmpFlxTRs = TmpFlxTSt.executeQuery(select);

        while (TmpFlxTRs.next()) {
            cbx.addItem(TmpFlxTRs.getString("StudName"));
            Object comboitem=cbx.getSelectedItem();
        }

        TmpFlxTRs.close();
        TmpFlxTSt.close();
    }
    catch(Exception e) {
        System.out.println(e);
    }

}


@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

    jPanel1 = new javax.swing.JPanel();
    jPanel2 = new javax.swing.JPanel();
    CmdA = new javax.swing.JButton();
    CmdE = new javax.swing.JButton();
    CmdD = new javax.swing.JButton();
    cmdQ = new javax.swing.JButton();
    jPanel3 = new javax.swing.JPanel();
    jScrollPane1 = new javax.swing.JScrollPane();
    FlxT = new javax.swing.JTable();
    cbx = new javax.swing.JComboBox();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    jPanel2.setBorder(
        javax.swing.BorderFactory.createTitledBorder(
            javax.swing.BorderFactory.createMatteBorder(
                1, 1, 1, 1, new java.awt.Color(0, 0, 255
            )
        ), "Commands")
    );

    CmdA.setFont(new java.awt.Font("Arial", 0, 10));
    CmdA.setText("+");
    CmdA.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            CmdAActionPerformed(evt);
        }
    });

    CmdE.setFont(new java.awt.Font("Arial", 0, 10));
    CmdE.setText("E");

    CmdD.setFont(new java.awt.Font("Arial", 0, 10));
    CmdD.setText("-");

    cmdQ.setFont(new java.awt.Font("Arial", 0, 10));
    cmdQ.setText("Q");
    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
    jPanel2Layout.createParallelGroup(
        javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(
              CmdA,javax.swing.GroupLayout.PREFERRED_SIZE,64,javax.swing.GroupLayout.PREFERRED_SIZE
                 )
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(CmdE, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(CmdD, javax.swing.GroupLayout.DEFAULT_SIZE, 72, Short.MAX_VALUE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(cmdQ, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(35, 35, 35))
        );

        jPanel2Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {CmdA, CmdE, cmdQ});

        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(CmdA, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(CmdE, javax.swing.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE)
                    .addComponent(CmdD, javax.swing.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE)
                    .addComponent(cmdQ, javax.swing.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE))
                .addContainerGap())
        );

        jPanel3.setBorder(javax.swing.BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 255)));

        FlxT.setFont(new java.awt.Font("Arial", 0, 10));
        FlxT.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "StudName", "StudClass", "StudMrk1", "StudMrk2", "StudTot", "StudRes", "StudNO", "StudId"
            }
        ) {
            Class[] types = new Class [] {
                java.lang.String.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.String.class, java.lang.Integer.class, java.lang.Integer.class
            };

            public Class getColumnClass(int columnIndex) {
                return types [columnIndex];
            }
        });
        jScrollPane1.setViewportView(FlxT);
        FlxT.getColumnModel().getColumn(0).setResizable(false);
        FlxT.getColumnModel().getColumn(0).setPreferredWidth(150);
        FlxT.getColumnModel().getColumn(1).setResizable(false);
        FlxT.getColumnModel().getColumn(1).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(2).setResizable(false);
        FlxT.getColumnModel().getColumn(2).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(3).setResizable(false);
        FlxT.getColumnModel().getColumn(3).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(4).setResizable(false);
        FlxT.getColumnModel().getColumn(4).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(5).setResizable(false);
        FlxT.getColumnModel().getColumn(5).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(6).setMinWidth(0);
        FlxT.getColumnModel().getColumn(6).setPreferredWidth(0);
        FlxT.getColumnModel().getColumn(6).setMaxWidth(0);
        FlxT.getColumnModel().getColumn(7).setMinWidth(0);
        FlxT.getColumnModel().getColumn(7).setPreferredWidth(0);
        FlxT.getColumnModel().getColumn(7).setMaxWidth(0);

        javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 1015, Short.MAX_VALUE)
            .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel3Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 995, Short.MAX_VALUE)
                    .addContainerGap()))
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 249, Short.MAX_VALUE)
            .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel3Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 184, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(54, Short.MAX_VALUE)))
        );

        cbx.setEditable(true);
        cbx.setFont(new java.awt.Font("Arial", 0, 10)); // NOI18N
        cbx.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbxActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(657, Short.MAX_VALUE)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(122, 122, 122)
                .addComponent(cbx, javax.swing.GroupLayout.PREFERRED_SIZE, 124, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(791, Short.MAX_VALUE))
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addContainerGap()))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(19, 19, 19)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(cbx, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(777, Short.MAX_VALUE))
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addGap(190, 190, 190)
                    .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(503, Short.MAX_VALUE)))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 1047, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 955, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
        );

        pack();
        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        java.awt.Dimension dialogSize = getSize();
        setLocation((screenSize.width-dialogSize.width)/2,(screenSize.height-dialogSize.height)/2);
    }// </editor-fold>

    private void CmdAActionPerformed(java.awt.event.ActionEvent evt) {                                     

        f1.setVisible(true);

 // TODO add your handling code here:
    }                                    

    private void cbxActionPerformed(java.awt.event.ActionEvent evt) {

}

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                 FrmeA fr=new FrmeA();
                 fr.combo();
                 fr.setVisible(true);
                   //fr.initconn();
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton CmdA;
    private javax.swing.JButton CmdD;
    private javax.swing.JButton CmdE;
    private javax.swing.JTable FlxT;
    private javax.swing.JComboBox cbx;
    private javax.swing.JButton cmdQ;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JScrollPane jScrollPane1;
    // End of variables declaration
}
原文

I use the following code for retrieve the data from mysql Student data Base.It was work properly.It will show the student Name in combo box.The value is retrieved from Db.

My problem is the first value(first student Name which is stored in Database column) displayed in the Jcombobox name field Automatically and it was show when I click Combo Box arrow..It means when I execute this following code I see the first value(first Name) in combobox's name field nearby arrow .But I need "Student Name" Title in there.If i assign that design time but that same name displayed once again when i click that arrow.how to solve this?

My another problem is how to get select "combo box items "when I type combo box's name field.It means if I type S means the combo box items selected which is started with S.

package designstudent;
import java.awt.*;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.*;
import javax.swing.table.DefaultTableModel;
import java.sql.*;
import javax.swing.JOptionPane;
import javax.swing.ListSelectionModel;
import javax.swing.*;



public class FrmeA extends javax.swing.JFrame  {

    FrmA1 f1=new FrmA1();
    Statement TmpFlxTSt=null;
    ResultSet TmpFlxTRs=null;
    GContnStr GCS=new GContnStr();

public FrmeA() {
    initComponents();
}

public void combo() {

    try {
        GCS.GContnStr();
        TmpFlxTSt= GCS.GCotnStr.createStatement();
        String select = "Select StudName from studentmaster";
        TmpFlxTRs = TmpFlxTSt.executeQuery(select);

        while (TmpFlxTRs.next()) {
            cbx.addItem(TmpFlxTRs.getString("StudName"));
            Object comboitem=cbx.getSelectedItem();
        }

        TmpFlxTRs.close();
        TmpFlxTSt.close();
    }
    catch(Exception e) {
        System.out.println(e);
    }

}


@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

    jPanel1 = new javax.swing.JPanel();
    jPanel2 = new javax.swing.JPanel();
    CmdA = new javax.swing.JButton();
    CmdE = new javax.swing.JButton();
    CmdD = new javax.swing.JButton();
    cmdQ = new javax.swing.JButton();
    jPanel3 = new javax.swing.JPanel();
    jScrollPane1 = new javax.swing.JScrollPane();
    FlxT = new javax.swing.JTable();
    cbx = new javax.swing.JComboBox();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    jPanel2.setBorder(
        javax.swing.BorderFactory.createTitledBorder(
            javax.swing.BorderFactory.createMatteBorder(
                1, 1, 1, 1, new java.awt.Color(0, 0, 255
            )
        ), "Commands")
    );

    CmdA.setFont(new java.awt.Font("Arial", 0, 10));
    CmdA.setText("+");
    CmdA.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            CmdAActionPerformed(evt);
        }
    });

    CmdE.setFont(new java.awt.Font("Arial", 0, 10));
    CmdE.setText("E");

    CmdD.setFont(new java.awt.Font("Arial", 0, 10));
    CmdD.setText("-");

    cmdQ.setFont(new java.awt.Font("Arial", 0, 10));
    cmdQ.setText("Q");
    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
    jPanel2Layout.createParallelGroup(
        javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(
              CmdA,javax.swing.GroupLayout.PREFERRED_SIZE,64,javax.swing.GroupLayout.PREFERRED_SIZE
                 )
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(CmdE, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(CmdD, javax.swing.GroupLayout.DEFAULT_SIZE, 72, Short.MAX_VALUE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(cmdQ, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(35, 35, 35))
        );

        jPanel2Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {CmdA, CmdE, cmdQ});

        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(CmdA, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(CmdE, javax.swing.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE)
                    .addComponent(CmdD, javax.swing.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE)
                    .addComponent(cmdQ, javax.swing.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE))
                .addContainerGap())
        );

        jPanel3.setBorder(javax.swing.BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 255)));

        FlxT.setFont(new java.awt.Font("Arial", 0, 10));
        FlxT.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "StudName", "StudClass", "StudMrk1", "StudMrk2", "StudTot", "StudRes", "StudNO", "StudId"
            }
        ) {
            Class[] types = new Class [] {
                java.lang.String.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.String.class, java.lang.Integer.class, java.lang.Integer.class
            };

            public Class getColumnClass(int columnIndex) {
                return types [columnIndex];
            }
        });
        jScrollPane1.setViewportView(FlxT);
        FlxT.getColumnModel().getColumn(0).setResizable(false);
        FlxT.getColumnModel().getColumn(0).setPreferredWidth(150);
        FlxT.getColumnModel().getColumn(1).setResizable(false);
        FlxT.getColumnModel().getColumn(1).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(2).setResizable(false);
        FlxT.getColumnModel().getColumn(2).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(3).setResizable(false);
        FlxT.getColumnModel().getColumn(3).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(4).setResizable(false);
        FlxT.getColumnModel().getColumn(4).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(5).setResizable(false);
        FlxT.getColumnModel().getColumn(5).setPreferredWidth(70);
        FlxT.getColumnModel().getColumn(6).setMinWidth(0);
        FlxT.getColumnModel().getColumn(6).setPreferredWidth(0);
        FlxT.getColumnModel().getColumn(6).setMaxWidth(0);
        FlxT.getColumnModel().getColumn(7).setMinWidth(0);
        FlxT.getColumnModel().getColumn(7).setPreferredWidth(0);
        FlxT.getColumnModel().getColumn(7).setMaxWidth(0);

        javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 1015, Short.MAX_VALUE)
            .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel3Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 995, Short.MAX_VALUE)
                    .addContainerGap()))
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 249, Short.MAX_VALUE)
            .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel3Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 184, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(54, Short.MAX_VALUE)))
        );

        cbx.setEditable(true);
        cbx.setFont(new java.awt.Font("Arial", 0, 10)); // NOI18N
        cbx.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbxActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(657, Short.MAX_VALUE)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(122, 122, 122)
                .addComponent(cbx, javax.swing.GroupLayout.PREFERRED_SIZE, 124, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(791, Short.MAX_VALUE))
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addContainerGap()))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(19, 19, 19)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(cbx, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(777, Short.MAX_VALUE))
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addGap(190, 190, 190)
                    .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(503, Short.MAX_VALUE)))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 1047, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 955, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
        );

        pack();
        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        java.awt.Dimension dialogSize = getSize();
        setLocation((screenSize.width-dialogSize.width)/2,(screenSize.height-dialogSize.height)/2);
    }// </editor-fold>

    private void CmdAActionPerformed(java.awt.event.ActionEvent evt) {                                     

        f1.setVisible(true);

 // TODO add your handling code here:
    }                                    

    private void cbxActionPerformed(java.awt.event.ActionEvent evt) {

}

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                 FrmeA fr=new FrmeA();
                 fr.combo();
                 fr.setVisible(true);
                   //fr.initconn();
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton CmdA;
    private javax.swing.JButton CmdD;
    private javax.swing.JButton CmdE;
    private javax.swing.JTable FlxT;
    private javax.swing.JComboBox cbx;
    private javax.swing.JButton cmdQ;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JScrollPane jScrollPane1;
    // End of variables declaration
}

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评论（1）

呆° 2024-12-31 21:45:14

您查看了 AutoCompete JComboBox / JTextField，注意到您有保存两个 Java 类，示例 此处，请不要使用Netbeans生成的代码，因为在大多数情况下太难了重写基本方法，使用 Standard Swing JComponents 代替

you have look at AutoCompete JComboBox / JTextField, notice you have to save both Java classes, examples here, please don't use Netbeans generated code, because in most cases is too hard overrive basic methods, use Standard Swing JComponents instead

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