jcombobox与jtable的连接
eg：jcombobox下拉菜单里有三个值a、b、c，
现在想要使当选择 a 时，对应显示表格 a ；
相应 选择 b 时，对应显示表格 b ；
选择 c ，显示表格 c ；
[解决办法]
这是三个数据模型相同的JTable的控制显示，只是切换JTable的数据模型就可以，你先看看，待会再贴数据模型不同的控制
import javax.swing.*;import javax.swing.event.*;import javax.swing.table.*;import java.awt.*;import java.awt.event.*;import java.util.*;import java.util.List;public class JTableDemo4 extends JFrame implements ActionListener{ private JTable[] jTable=new JTable[3]; // private JButton bn1,bn2,bn3; private JComboBox combobox=null; private JPanel panel=null; private MyModel[] model=new MyModel[3]; private JScrollPane s_pane=null; private Container contentPane=null; public JTableDemo4(String title){ super(title); model[0]=new MyModel(2); jTable[0]=new JTable(model[0]); model[1]=new MyModel(4); jTable[1]=new JTable(model[1]); model[2]=new MyModel(6); jTable[2]=new JTable(model[2]); contentPane=this.getContentPane(); combobox=new JComboBox(); combobox.addItem("table1(2 users)"); combobox.addItem("table2(4 users)"); combobox.addItem("table3(6 users)"); combobox.addActionListener(this); panel=new JPanel(); panel.add(combobox); List<User> list1=new ArrayList<User>(); for(int i=0;i<3;i++){ User u=new User(i,"user"+i,"list1"); list1.add(u); } s_pane=new JScrollPane(jTable[0]); contentPane.add(panel,BorderLayout.SOUTH); contentPane.add(s_pane,BorderLayout.CENTER); pack(); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub System.out.println("action performed"); int index=combobox.getSelectedIndex(); System.out.println("index:"+index); jTable[0].setModel(model[index]); jTable[0].updateUI();// s_pane.removeAll();// s_pane.add(jTable[index]);//// s_pane=new JScrollPane();//// s_pane.validate();// contentPane.validate();// this.validate();// this.repaint(); } /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub new JTableDemo4("MyDemo"); } class MyModel extends AbstractTableModel{ private ArrayList<User> list; private String [] title_name={"ID","用户名","密码"}; /** * 初始化构造 */ public MyModel(){ list=new ArrayList<User>(); for(int i=0;i<5;i++){ User user=new User(i,"user"+i,"user"+i); this.list.add(user); } /* * 这里数据结构当中加进去多少的数据， * 虚拟机会利用getValueAt(int row,int col)方法 * 全部给取出显示 */ } public MyModel(int userNum){ list=new ArrayList<User>(); for(int i=0;i<userNum;i++){ User user=new User(i,"user"+i,"user"+i); this.list.add(user); } /* * 这里数据结构当中加进去多少的数据， * 虚拟机会利用getValueAt(int row,int col)方法 * 全部给取出显示 */ } public void addRow(long id,String userName,String password){ User user=new User(id,userName,password); list.add(user); } public void removeRaw(int row){ list.remove(row); this.fireTableRowsDeleted(1,row+1); } public int getColumnCount() { // TODO Auto-generated method stub System.out.println("invoke method getColumnCount"); return title_name.length; } public String getColumnName(int col) { System.out.println("invoke method getColumnName"); return title_name[col]; } public int getRowCount() { // TODO Auto-generated method stub return list.size(); } public Object getValueAt(int rowIndex, int columnIndex) { // TODO Auto-generated method stub //System.out.println("invoke method getValueAt"); User result=list.get(rowIndex); return result.get(columnIndex); } public void setValueAt(Object value, int row, int col){ if(col==0) list.get(row).setId((Long)value); if(col==1) list.get(row).setUserName((String)value); if(col==2) list.get(row).setPassword((String)value); this.fireTableCellUpdated(row, col); } public boolean isCellEditable(int rowIndex, int columnIndex){ return true; } /** * 返回数据类型 */ public Class getColumnClass(int col) { return getValueAt(0, col).getClass(); } } class User{ private long id; private String userName; private String password; public User(){} public User(long id,String userName,String password){ this.id=id; this.userName=userName; this.password=password; } public Object get(int i){ if(i==0) return this.id; if(i==1) return this.userName; if(i==2) return this.password; else return null; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public long getId() { return id; } public void setId(long id) { this.id = id; } }}
[解决办法]
下面这个定义了不同的数据模型供你学习，差不多就结贴给分哈
import javax.swing.*;import javax.swing.event.*;import javax.swing.table.*;import java.awt.*;import java.awt.event.*;import java.util.*;import java.util.List;public class JTableDemo5 extends JFrame implements ActionListener{ private JTable[] jTable=new JTable[3]; private JComboBox combobox=null; private JPanel panel=null; private TableModel[] model=new TableModel[3]; private JScrollPane s_pane=null; private Container contentPane=null; public JTableDemo5(String title){ super(title); model[0]=new MyModel(2); jTable[0]=new JTable(model[0]); model[1]=new Table_Model(4); //不同数据模型的表 jTable[1]=new JTable(model[1]); model[2]=new MyModel(6); jTable[2]=new JTable(model[2]); contentPane=this.getContentPane(); combobox=new JComboBox(); combobox.addItem("table1(2 users)"); combobox.addItem("table2(4 users)"); combobox.addItem("table3(6 users)"); combobox.addActionListener(this); panel=new JPanel(); panel.add(combobox); s_pane=new JScrollPane(jTable[0]); contentPane.add(panel,BorderLayout.SOUTH); contentPane.add(s_pane,BorderLayout.CENTER); pack(); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub System.out.println("action performed"); int index=combobox.getSelectedIndex(); System.out.println("index:"+index); contentPane.remove(s_pane); s_pane=new JScrollPane(jTable[index]); contentPane.add(s_pane,BorderLayout.CENTER); this.repaint(); this.validate(); } /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub new JTableDemo5("MyDemo"); } class MyModel extends AbstractTableModel{ private ArrayList<User> list; private String [] title_name={"ID","username","password"}; public MyModel(){ list=new ArrayList<User>(); for(int i=0;i<5;i++){ User user=new User(i,"user"+i,"user"+i); this.list.add(user); } } public MyModel(int userNum){ list=new ArrayList<User>(); for(int i=0;i<userNum;i++){ User user=new User(i,"user"+i,"user"+i); this.list.add(user); } } public void addRow(long id,String userName,String password){ User user=new User(id,userName,password); list.add(user); } public void removeRaw(int row){ list.remove(row); this.fireTableRowsDeleted(1,row+1); } public int getColumnCount() { // TODO Auto-generated method stub// System.out.println("invoke method getColumnCount"); return title_name.length; } public String getColumnName(int col) {// System.out.println("invoke method getColumnName"); return title_name[col]; } public int getRowCount() { // TODO Auto-generated method stub return list.size(); } public Object getValueAt(int rowIndex, int columnIndex) { // TODO Auto-generated method stub //System.out.println("invoke method getValueAt"); User result=list.get(rowIndex); return result.get(columnIndex); } public void setValueAt(Object value, int row, int col){ if(col==0) list.get(row).setId((Long)value); if(col==1) list.get(row).setUserName((String)value); if(col==2) list.get(row).setPassword((String)value); this.fireTableCellUpdated(row, col); } public boolean isCellEditable(int rowIndex, int columnIndex){ return true; } /** * ??????????? */ public Class getColumnClass(int col) { return getValueAt(0, col).getClass(); } } class User{ private long id; private String userName; private String password; public User(){} public User(long id,String userName,String password){ this.id=id; this.userName=userName; this.password=password; } public Object get(int i){ if(i==0) return this.id; if(i==1) return this.userName; if(i==2) return this.password; else return null; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public long getId() { return id; } public void setId(long id) { this.id = id; } }}class Table_Model extends AbstractTableModel { private static final long serialVersionUID = -7495940408592595397L; private Vector content = null; private String[] title_name = { "ID", "姓名", "性别", "年龄" }; public Table_Model() { content = new Vector(); } public Table_Model(int count) { content = new Vector(count); for(int i=0;i<count;i++){ addRow("person"+i,true,String.valueOf(i)); } } public void addRow(String name, boolean sex, String age) { Vector v = new Vector(4); v.add(0, new Integer(content.size())); v.add(1, name); v.add(2, new Boolean(sex)); v.add(3, age); content.add(v); } public void removeRow(int row) { content.remove(row); } public void removeRows(int row, int count) { for (int i = 0; i < count; i++) { if (content.size() > row) { content.remove(row); } } } /** * 让表格中某些值可修改，但需要setValueAt(Object value, int row, int col)方法配合才能使修改生效 */ public boolean isCellEditable(int rowIndex, int columnIndex) { if (columnIndex == 0) { return false; } return true; } /** * 使修改的内容生效 */ public void setValueAt(Object value, int row, int col) { ((Vector) content.get(row)).remove(col); ((Vector) content.get(row)).add(col, value); this.fireTableCellUpdated(row, col); } public String getColumnName(int col) { return title_name[col]; } public int getColumnCount() { return title_name.length; } public int getRowCount() { return content.size(); } public Object getValueAt(int row, int col) { return ((Vector) content.get(row)).get(col); } /** * 返回数据类型 */ public Class getColumnClass(int col) { return getValueAt(0, col).getClass(); }}