Swing I';我可以使用setValueAt()更新TableModel,但更改在表中不可见
我可以使用setValueAt()更新TableModel,但更改在表中不可见 代码如下:Swing I';我可以使用setValueAt()更新TableModel,但更改在表中不可见,swing,jtable,tablemodel,Swing,Jtable,Tablemodel,我可以使用setValueAt()更新TableModel,但更改在表中不可见 代码如下: import javax.swing.JFrame; import javax.swing.JDialog; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.AbstractTableM
import javax.swing.JFrame;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;
public class TableFTFEditDemo extends JPanel {
private boolean DEBUG = true;
JTable table;
MyTableModel tableModel=new MyTableModel();
public TableFTFEditDemo() {
super(new GridLayout(1,0));
table = new JTable(tableModel);
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Set up stricter input validation for the integer column.
table.setDefaultEditor(Integer.class,
new IntegerEditor(0, 100));
//If we didn't want this editor to be used for other
//Integer columns, we'd do this:
//table.getColumnModel().getColumn(3).setCellEditor(
// new IntegerEditor(0, 100));
//Add the scroll pane to this panel.
add(scrollPane);
}
class MyTableModel extends AbstractTableModel {
private String[] columnNames ;
private Object[][] data;
MyTableModel(){
columnNames=new String[] {"First Name","Last Name","Sport","# of Seaters","Vegetarian","blank"};
data=new Object[][] {
{"Kathy", "Smith",
"Snowboarding", new Integer(5), new Boolean(false),"sdf"},
{"John", "Doe",
"Rowing", new Integer(3), new Boolean(true),"reytry"},
{"Sue", "Black",
"Knitting", new Integer(2), new Boolean(false),"wwttu"},
{"Jane", "White",
"Speed reading", new Integer(20), new Boolean(true),"yuiyio"},
{"Joe", "Brown",
"Pool", new Integer(10), new Boolean(false),"ertey"}
};
}
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return data.length;
}
public String getColumnName(int col) {
return columnNames[col];
}
public Object getValueAt(int row, int col) {
return data[row][col];
}
/*
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
*/
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
}
}
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
}
data[row][col] = value;
this.fireTableCellUpdated(row,col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
}
}
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
}
System.out.println();
}
System.out.println("--------------------------");
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("TableFTFEditDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TableFTFEditDemo newContentPane = new TableFTFEditDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
void runtable(){
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
tableModel.setValueAt(new Integer(5),2,5);
((AbstractTableModel)table.getModel()).fireTableCellUpdated(2,5);
}
});
}
/** using this to call setValueAt from other classes*/
public void setValueAt1(Object value, int row, int col) {
table.setValueAt(new Integer(5),row,col);
((AbstractTableModel)table.getModel()).fireTableCellUpdated(row,col);
}
}
import javax.swing.JFrame;
导入javax.swing.JDialog;
导入javax.swing.JPanel;
导入javax.swing.JScrollPane;
导入javax.swing.JTable;
导入javax.swing.table.AbstractTableModel;
导入java.awt.Dimension;
导入java.awt.GridLayout;
公共类TableFTFEditDemo扩展了JPanel{
私有布尔调试=true;
JTable表;
MyTableModel tableModel=新的MyTableModel();
公共表ftfeditdemo(){
超级(新网格布局(1,0));
table=新的JTable(tableModel);
表.setPreferredScrollableViewportSize(新维度(500,70));
表.setFillsViewPerthweight(真);
//创建滚动窗格并将表添加到其中。
JScrollPane scrollPane=新的JScrollPane(表);
//为整数列设置更严格的输入验证。
table.setDefaultEditor(Integer.class、,
新的整数编辑器(01100);
//如果我们不想让这个编辑器用于其他
//整数列,我们可以这样做:
//表.getColumnModel().getColumn(3).setCellEditor(
//新的整数编辑器(01100);
//将滚动窗格添加到此面板。
添加(滚动窗格);
}
类MyTableModel扩展了AbstractTableModel{
私有字符串[]列名称;
私有对象[][]数据;
MyTableModel(){
columnNames=新字符串[]{“名字”、“姓氏”、“运动”、“座位”、“素食者”、“空白”};
数据=新对象[][]{
{“凯西”,“史密斯”,
“滑雪板”、新整数(5)、新布尔值(false)、“sdf”}、,
{“约翰”,“多伊”,
“Rowing”、新整数(3)、新布尔值(true)、“reytry”}、,
{“苏”,“黑”,
“编织”,新整数(2),新布尔值(false),“wwttu”},
{“简”、“白”,
“快速读取”、新整数(20)、新布尔值(true)、“yuiyio”}、,
{“乔”,“布朗”,
“Pool”、新整数(10)、新布尔值(false)、“ertey”}
};
}
public int getColumnCount(){
返回columnNames.length;
}
public int getRowCount(){
返回数据长度;
}
公共字符串getColumnName(int-col){
返回列名[col];
}
公共对象getValueAt(整数行,整数列){
返回数据[行][col];
}
/*
*JTable使用此方法确定默认渲染器/
*每个单元格的编辑器。如果我们没有实现此方法,
*最后一列将包含文本(“真”/“假”),
*而不是复选框。
*/
公共类getColumnClass(int c){
返回getValueAt(0,c).getClass();
}
公共布尔值可编辑(int行,int列){
//请注意,数据/单元地址是恒定的,
//无论单元格出现在屏幕上的何处。
if(col<2){
返回false;
}否则{
返回true;
}
}
public void setValueAt(对象值、整行、整列){
如果(调试){
System.out.println(“设置值在“+行+”,“+列
+“至”+价值
+“(一个例子)
+value.getClass()+”);
}
数据[行][列]=值;
此.firetablecell已更新(行、列);
如果(调试){
System.out.println(“数据的新值:”);
printDebugData();
}
}
私有void printDebugData(){
int numRows=getRowCount();
int numCols=getColumnCount();
对于(int i=0;i
PS:代码以frm oracle为例。我只想知道如何在表中反映tablemodel中所做的更改。您的代码按预期工作,只是您实际上没有在您的模型上调用
setValueAt()
。您执行的runtable()方法永远不会被调用
要进行验证,请更改createAndShowGUI()
以返回newContentPane
,并使用以下主菜单:
static TableFTFEditDemo instance;
public static void main(String[] args) throws Exception {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
instance = createAndShowGUI();
}
});
Thread.sleep(5000);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
instance.tableModel.setValueAt(5, 2, 5);
}
});
}
编程的5秒延迟后,第2列第5行中的值将从“wwtu”变为“5”。Thanx用于应答。实际上,我会使用其他类别的setValueAt1()