Java jtable中的动态jcombobox项
我试图创建一个每行有两个组合框的Jtable。我已经查阅了关于这方面的教程,发现我可以在combobox中添加静态数据。但是为什么我可以将动态数据加载到组合框中呢 甚至,每当用户从行中选择组合框1时,基于此,组合框2将被更新 有人能帮我吗 如果我从组合框中删除了Java jtable中的动态jcombobox项,java,swing,jtable,dynamic-data,jcombobox,Java,Swing,Jtable,Dynamic Data,Jcombobox,我试图创建一个每行有两个组合框的Jtable。我已经查阅了关于这方面的教程,发现我可以在combobox中添加静态数据。但是为什么我可以将动态数据加载到组合框中呢 甚至,每当用户从行中选择组合框1时,基于此,组合框2将被更新 有人能帮我吗 如果我从组合框中删除了removeAllItems(),则组合框2将更新,但我无法添加新条目 提前感谢。表格有两列,两列都呈现为JComboBox。现在,第2列项目的选择取决于第1列的选择 import java.awt.Component; import
removeAllItems()
,则组合框2将更新,但我无法添加新条目
提前感谢。表格有两列,两列都呈现为
JComboBox。
现在,第2列项目的选择取决于第1列的选择
import java.awt.Component;
import java.awt.EventQueue;
import java.util.ArrayList;
import java.util.List;
import javax.swing.DefaultCellEditor;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class ComboBoxExample {
private void createUI() {
JFrame frame = new JFrame();
Object[] columNames = {"Combo-1", "Combo-2"};
Object[][] data = {{"", ""}, {"", ""}, {"", ""}, {"", ""}};
JTable table = new JTable(data, columNames);
table.getColumnModel().getColumn(0).setCellEditor(new CustomComboBoxEditor());
table.getColumnModel().getColumn(1).setCellEditor(new CustomComboBoxEditor());
frame.add(new JScrollPane(table));
frame.setTitle("Column -2 based on Column - 1 ComboBox Selection.");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
new ComboBoxExample().createUI();
}
};
EventQueue.invokeLater(r);
}
}
class CustomComboBoxEditor extends DefaultCellEditor {
// Declare a model that is used for adding the elements to the `ComboBox`
private DefaultComboBoxModel model;
private List<String> obtainedList;
public CustomComboBoxEditor() {
super(new JComboBox());
this.model = (DefaultComboBoxModel)((JComboBox)getComponent()).getModel();
obtainedList = new ArrayList<String>();
obtainedList.add("One");
obtainedList.add("Two");
obtainedList.add("Three");
obtainedList.add("Four");
obtainedList.add("Five");
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
if(column == 0) {
model.removeAllElements();
for(int i = 0; i < obtainedList.size(); i++) {
model.addElement(obtainedList.get(i));
}
} else {
model.removeAllElements();
String selectedItem = (String) table.getValueAt(row, 0);
for(int i = 0; i < obtainedList.size(); i++) {
if(!selectedItem.equals(obtainedList.get(i)))
model.addElement(obtainedList.get(i));
}
} // Close else
return super.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
导入java.awt.Component;
导入java.awt.EventQueue;
导入java.util.ArrayList;
导入java.util.List;
导入javax.swing.DefaultCellEditor;
导入javax.swing.DefaultComboxModel;
导入javax.swing.JComboBox;
导入javax.swing.JFrame;
导入javax.swing.JScrollPane;
导入javax.swing.JTable;
公共类组合框示例{
私有void createUI(){
JFrame=新JFrame();
Object[]columNames={“Combo-1”、“Combo-2”};
对象[][]数据={{,},{,},{,{,},{,},{,},{,};
JTable table=新的JTable(数据、列名称);
table.getColumnModel().getColumn(0.setCellEditor(新的CustomComboboxBoxeditor());
table.getColumnModel().getColumn(1.setCellEditor(新的CustomComboboxBoxeditor());
frame.add(新的JScrollPane(表));
setTitle(“基于第1列组合框选择的第2列”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
公共静态void main(字符串[]args){
Runnable r=新的Runnable(){
@凌驾
公开募捐{
新建ComboBoxExample().createUI();
}
};
调用器(r);
}
}
类CustomComboBoxEditor扩展了DefaultCellEditor{
//声明用于将元素添加到“ComboBox”的模型`
私有模型;
获取的私有列表列表;
公共CustomComboxBoxeditor(){
super(新JComboBox());
this.model=(DefaultComboxModel)((JComboBox)getComponent()).getModel();
AcquiredList=新的ArrayList();
获取列表。添加(“一”);
获取列表。添加(“两个”);
获取列表。添加(“三”);
获取列表。添加(“四”);
获取列表。添加(“五”);
}
@凌驾
公共组件getTableCellEditorComponent(JTable表、对象值、布尔isSelected、int行、int列){
如果(列==0){
model.removeAllElements();
对于(int i=0;i
表格有两列,两列都呈现为JComboBox。
现在,第2列项目的选择取决于第1列的选择
import java.awt.Component;
import java.awt.EventQueue;
import java.util.ArrayList;
import java.util.List;
import javax.swing.DefaultCellEditor;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class ComboBoxExample {
private void createUI() {
JFrame frame = new JFrame();
Object[] columNames = {"Combo-1", "Combo-2"};
Object[][] data = {{"", ""}, {"", ""}, {"", ""}, {"", ""}};
JTable table = new JTable(data, columNames);
table.getColumnModel().getColumn(0).setCellEditor(new CustomComboBoxEditor());
table.getColumnModel().getColumn(1).setCellEditor(new CustomComboBoxEditor());
frame.add(new JScrollPane(table));
frame.setTitle("Column -2 based on Column - 1 ComboBox Selection.");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
new ComboBoxExample().createUI();
}
};
EventQueue.invokeLater(r);
}
}
class CustomComboBoxEditor extends DefaultCellEditor {
// Declare a model that is used for adding the elements to the `ComboBox`
private DefaultComboBoxModel model;
private List<String> obtainedList;
public CustomComboBoxEditor() {
super(new JComboBox());
this.model = (DefaultComboBoxModel)((JComboBox)getComponent()).getModel();
obtainedList = new ArrayList<String>();
obtainedList.add("One");
obtainedList.add("Two");
obtainedList.add("Three");
obtainedList.add("Four");
obtainedList.add("Five");
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
if(column == 0) {
model.removeAllElements();
for(int i = 0; i < obtainedList.size(); i++) {
model.addElement(obtainedList.get(i));
}
} else {
model.removeAllElements();
String selectedItem = (String) table.getValueAt(row, 0);
for(int i = 0; i < obtainedList.size(); i++) {
if(!selectedItem.equals(obtainedList.get(i)))
model.addElement(obtainedList.get(i));
}
} // Close else
return super.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
导入java.awt.Component;
导入java.awt.EventQueue;
导入java.util.ArrayList;
导入java.util.List;
导入javax.swing.DefaultCellEditor;
导入javax.swing.DefaultComboxModel;
导入javax.swing.JComboBox;
导入javax.swing.JFrame;
导入javax.swing.JScrollPane;
导入javax.swing.JTable;
公共类组合框示例{
私有void createUI(){
JFrame=新JFrame();
Object[]columNames={“Combo-1”、“Combo-2”};
对象[][]数据={{,},{,},{,{,},{,},{,},{,};
JTable table=新的JTable(数据、列名称);
table.getColumnModel().getColumn(0.setCellEditor(新的CustomComboboxBoxeditor());
table.getColumnModel().getColumn(1.setCellEditor(新的CustomComboboxBoxeditor());
frame.add(新的JScrollPane(表));
setTitle(“基于第1列组合框选择的第2列”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
公共静态void main(字符串[]args){
Runnable r=新的Runnable(){
@凌驾
公开募捐{
新建ComboBoxExample().createUI();
}
};
调用器(r);
}
}
类CustomComboBoxEditor扩展了DefaultCellEditor{
//声明用于将元素添加到“ComboBox”的模型`
私有模型;
获取的私有列表列表;
公共CustomComboxBoxeditor(){
super(新JComboBox());
this.model=(DefaultComboxModel)((JComboBox)getComponent()).getModel();
AcquiredList=新的ArrayList();
获取列表。添加(“一”);
获取列表。添加(“两个”);
获取列表。添加(“三”);
获取列表。添加(“四”);
获取列表。添加(“五”);
}
@凌驾
公共组件getTableCellEditorComponent(JTable表、对象值、布尔isSelected、int行、int列){
如果(列==0){
model.removeAllElements();
对于(int i=0;i combobox.addItem("one");
combobox.addItem("two");