Java 如何将对象添加到CComboBox
我已声明我的邮箱如下:Java 如何将对象添加到CComboBox,java,swt,ccombobox,Java,Swt,Ccombobox,我已声明我的邮箱如下: final CCombo combobox= new CCombo(shell, SWT.BORDER); combobox.setBounds(30, 22, 88, 21); ResultSet result = statement.executeQuery(); 我想将myCombo类的对象添加到combobox while(result.next()) { String ProName=re
final CCombo combobox= new CCombo(shell, SWT.BORDER);
combobox.setBounds(30, 22, 88, 21);
ResultSet result = statement.executeQuery();
我想将myCombo类的对象添加到combobox
while(result.next())
{
String ProName=result.getString(1);
String ProId=result.getString(2);
myCombo comboItem=new myCombo(ProId,ProName); //OBJECT comboItem
combobox.addElement(comboItem); //ERROR The method addElement(myCombo)
is undefined for the type CCombo
}
组合框中出错。添加元素(组合项)。。。。但是addElement()已经在cmbo中定义
这是myCombo班
class myCombo{
private String ProId;
private String ProName;
public myCombo(String ProId, String ProName) {
this.ProId=ProId;
this.ProName=ProName;
}
public String getProductName() {
return ProName;
}
public String getProductId() {
return ProId;
}
@Override
public String toString() {
return ProName;
}
}
如何取回所选数据。将错误显示为超高
combobox.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
myCombo item = (myCombo) combo.getItem(getSelectionIndex()) ; //ERROR
if (item!=null) {
System.out.printf("You've selected Product Name: %s, Product ID: %s%n",
item.getProductName(), item.getProductId());
}
}
});
如果您正在使用,则它没有addElement(Object o)
方法。它有add(String s)
方法,您必须重写toString()
例如 要获取所选内容
combo.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
System.out.print("Selected Value-");
System.out.print(combo.getItem(combo.getSelectionIndex()));
}
});
如果可以的话,你应该使用JFace ComboViewer而不是SWT CCombo direcltySwing,SWT是完全不同的,你应该弄清楚你在问什么。谢谢你的帮助,我也想知道。如何取回数据。在AddSelectionListener中,我找不到如何从组合框中获取所选数据并将其转换为objectOr,您可以直接打印
System.out.println(combo.getItem(getSelectionIndex())代码>类型new SelectionAdapter()的方法getSelectionIndex()未定义{}我应该在getSelectionIndex()方法中定义什么
@Override
public String toString() {
return ProId+":"+ProName;
}
combo.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
System.out.print("Selected Value-");
System.out.print(combo.getItem(combo.getSelectionIndex()));
}
});