我有一个表，其中一列需要包含组合框。
当我运行以下代码时，我会在每个单元格中获得组合框，但这些项目不会添加到其中。当我尝试使用system.out.println(val)打印项目时，它们会被打印，但它们不会被添加到组合框中。
我该怎么做？
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
for(Entry<String, HashSet<String>> avar : Annotation.resultSet.entrySet()) {
Object[] row = new Object[2];
row[0] = avar.getKey();
JComboBox comboBox = new JComboBox();
int i = 1;
DefaultTableModel model = (DefaultTableModel) annoTab.getModel();
model.addRow(row);
TableColumn valueColumn = annoTab.getColumnModel().getColumn(1);
setUpValueColumn(valueColumn, avar.getValue());
}
}
public void setUpValueColumn(TableColumn sportColumn, HashSet<String> values) {
JComboBox comboBox = new JComboBox(new DefaultComboBoxModel(values.toArray()));
for(String val : values) {
System.out.println(val);
comboBox.addItem(val);
}
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
ComboBoxTableCellRenderer renderer
= new ComboBoxTableCellRenderer();
sportColumn.setCellRenderer(renderer);
}
完整代码
AnnotationGeneration.java
public class AnnotationGeneration extends javax.swing.JFrame {
class ComboBoxTableCellRenderer extends JComboBox implements TableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
setSelectedItem(value);
return this;
}
}
public AnnotationGeneration() {
initComponents();
DefaultTableModel model = (DefaultTableModel) annoTab.getModel();
while(model.getRowCount() > 0){
for(int i = 0 ; i < model.getRowCount();i++){
model.removeRow(i);
}
}
}
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
DefaultTableModel model = (DefaultTableModel) annoTab.getModel();
TableColumn valueColumn = annoTab.getColumnModel().getColumn(1);
CustomTableCellEditor customEditor = new CustomTableCellEditor();
for (Entry<String, HashSet<String>> avar : Annotation.resultSet.entrySet()) {
Object[] row = new Object[2];
row[0] = avar.getKey();
model.addRow(row);
setUpValueColumn(valueColumn, customEditor, avar.getValue());
}
valueColumn.setCellEditor(customEditor);
}
public void setUpValueColumn(TableColumn sportColumn, CustomTableCellEditor customEditor, HashSet<String> values) {
customEditor.addComboBox(new JComboBox(new DefaultComboBoxModel(values.toArray())));
ComboBoxTableCellRenderer renderer = new ComboBoxTableCellRenderer();
sportColumn.setCellRenderer(renderer);
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
}
public static String readFile( String file ) throws IOException {
BufferedReader reader = new BufferedReader( new FileReader (file));
String line = null;
StringBuilder sb = new StringBuilder();
String ls = System.getProperty("line.separator");
while( ( line = reader.readLine() ) != null ) {
sb.append( line );
sb.append( ls );
}
return sb.toString();
}
public static void main(String args[])
{
Annotation.ScoreCalculator();
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new AnnotationGeneration().setVisible(true);
}
});
}
static HashMap<String, String> annotation = new HashMap<String, String>();
static Vector<String> value = new Vector<String>();
JTextField feildArray[];
private javax.swing.JTable annoTab;
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JButton jButton4;
private javax.swing.JLabel jLabel1;
private javax.swing.JScrollPane jScrollPane1;
}
AnnotationVar.java
public class AnnotationVar implements Comparator<AnnotationVar>, Comparable<AnnotationVar>{
public AnnotationVar() {
this.attribute = new String();
this.values = new HashSet<String>();
this.score = 0.0f;
}
public AnnotationVar(String attribute) {
this();
this.attribute = attribute;
}
public AnnotationVar(String attribute, HashSet<String> values, float score){
this();
this.attribute = attribute;
this.values = values;
this.score = score;
}
private String attribute;
private HashSet<String> values;
private float score;
public String get_attribute() {
return this.attribute;
}
public HashSet<String> get_values() {
return this.values;
}
public AnnotationVar set_values(HashSet<String> values) {
this.values = values;
return this;
}
public AnnotationVar set_score(float score){
this.score = score;
return this;
}
@Override
public int compare(AnnotationVar o1, AnnotationVar o2) {
return -Float.compare(o1.score, o2.score);
}
@Override
public int compareTo(AnnotationVar av){
return -Float.compare(this.score, av.score);
}
@Override
public String toString() {
return this.attribute + " " + this.values.toString() + " " + Float.toString(this.score);
}
}
Annotation.java
public class Annotation {
public static HashMap<String, AnnotationVar> anotVarMap = new HashMap<String, AnnotationVar>();
public static HashMap<String, HashSet<String>> resultSet = new HashMap<String, HashSet<String>>();
private static float contVal(String b, String c) {
...
}
private static float contVal2(String b, String c) {
...
}
private static float querVal(String a1) {
...
}
private static void valueGen() throws IOException {
...
}
ArrayList<AnnotationVar> attList = new ArrayList<AnnotationVar>(anotVarMap.values());
Collections.sort(attList);
for(AnnotationVar att: attList) {
resultSet.put(att.get_attribute(), new HashSet<String>());
}
while (st.hasMoreTokens()) {
String tok = st.nextToken();
System.out.println(tok);
for(AnnotationVar avar : anotVarMap.values()) {
if(avar.get_values().contains(tok)) {
System.out.println(avar);
//attrib = avar.get_attribute();
resultSet.get(avar.get_attribute()).add(tok);
}
}
}
System.out.println("Updated collection :"+resultSet);
}
public static void ScoreCalculator() {
try
{
DBconnection con = new DBconnection();
PreparedStatement statement;
String x = "select count(*) from queryvalues";
statement = con.getConnection().prepareStatement(x);
ResultSet rs = statement.executeQuery();
while (rs.next())
{
String name = rs.getString(1);
int num = Integer.valueOf(name);
for(int i=1;i<num+1;i++)
{
String y = "select attribute from queryvalues where slno = ?";
statement = con.getConnection().prepareStatement(y);
statement.setInt(1, i);
ResultSet rs2 = statement.executeQuery();
while (rs2.next())
{
String a1 = rs2.getString(1);
anotVarMap.put(a1,new AnnotationVar(a1));
//System.out.println(a1);
String a = "D:/test5.txt" ;
String abc = AnnotationGeneration.readFile(a);
StringTokenizer st = new StringTokenizer(abc);
float cv1 = 1;
float cv4 =1;
while (st.hasMoreTokens())
{
String tok = st.nextToken();
float cv0 = contVal(a1,tok);
cv1 = cv0*cv1;
float cv3 = contVal2(a1,tok);
cv4=cv3*cv4;
}
float cv = cv1/cv4;
float qv1 = querVal(a1);
//System.out.println("querying value =" + qv1);
//System.out.println("content value =" + cv);
float score = cv*qv1;
//System.out.println("score of " + a1 + "=" + score);
String z = "INSERT into qvtemp(attribute,score) VALUES (?,?) ON DUPLICATE KEY UPDATE score = VALUES(score)";
statement = con.getConnection().prepareStatement(z);
statement.setString(1,a1);
statement.setFloat(2,score);
statement.executeUpdate();
anotVarMap.get(a1).set_score(score);
}
}
ArrayList<AnnotationVar> attList = new ArrayList<AnnotationVar>(anotVarMap.values());
Collections.sort(attList);
System.out.println(anotVarMap);
System.out.println(attList);
}
valueGen();
System.out.println(anotVarMap);
} catch (SQLException | IOException ex) {
Logger.getLogger(AnnotationGeneration.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
答案 0 :(得分：1)
然后你必须按如下方式定义自定义TableCellEditor。无论如何，我想出了以下内容。对于每一行，我存储组合框值并根据行返回值
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
DefaultTableModel model = (DefaultTableModel) annoTab.getModel();
TableColumn valueColumn = annoTab.getColumnModel().getColumn(1);
CustomTableCellEditor customEditor = new CustomTableCellEditor();
for (Entry<String, HashSet<String>> avar : Annotation.resultSet.entrySet()) {
Object[] row = new Object[2];
row[0] = avar.getKey();
//Edit to set the first value in hashset as defaultvalue;
row[1]=avar.getValue().iterator().next();
model.addRow(row);
setUpValueColumn(valueColumn, customEditor, avar.getValue());
}
valueColumn.setCellEditor(customEditor);
}
public void setUpValueColumn(TableColumn sportColumn, CustomTableCellEditor customEditor, HashSet<String> values) {
customEditor.addComboBox(new JComboBox(new DefaultComboBoxModel(values.toArray())));
ComboBoxTableCellRenderer renderer = new ComboBoxTableCellRenderer();
sportColumn.setCellRenderer(renderer);
}
customCellEditor
class CustomTableCellEditor extends AbstractCellEditor implements TableCellEditor {
private TableCellEditor editor;
private HashMap<Integer, JComboBox> listDetails = new HashMap<>();
public void addComboBox(JComboBox combobox) {
listDetails.put(listDetails.size(), combobox);
}
public void setComboBoxForRow(int row, JComboBox combobox) {
listDetails.put(row, combobox);
}
@Override
public Object getCellEditorValue() {
if (editor != null) {
return editor.getCellEditorValue();
}
return null;
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
if (listDetails.containsKey(row)) {
editor = new DefaultCellEditor(listDetails.get(row));
}
return editor.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}