error in netbeans crud application
package org.shop.ui;
import demo.Customer;
import java.util.List;
import java.util.logging.Logger;
import javax.persistence.EntityManager;
import javax.persistence.Persistence;
import javax.persistence.Query;
import org.openide.util.NbBundle;
import org.openide.windows.TopComponent;
import org.openide.windows.WindowManager;
import org.openide.util.ImageUtilities;
import org.netbeans.api.settings.ConvertAsProperties;
/**
* Top component which displays something.
*/
@ConvertAsProperties(dtd = "-//org.shop.ui//Customer//EN",
autostore = false)
public final class CustomerTopComponent extends TopComponent {
private static CustomerTopComponent instance;
/** path to the icon used by the component and its open action */
static final String ICON_PATH = "org/shop/ui/einstein_clerk.gif";
private static final String PREFERRED_ID = "CustomerTopComponent";
EntityManager entityManager = Persistence.createEntityManagerFactory("CustomerLibraryPU").createEntityManager();
Query query = entityManager.createQuery("SELECT c FROM Customer c");
List<Customer> resultList = query.getResultList();
for (Customer c : resultList) {
jTextArea1.append(c.getName() + " (" + c.getCity() + ")" + "\n");
}
public CustomerTopComponent() {
initComponents();
setName(NbBundle.getMessage(CustomerTopComponent.class, "CTL_CustomerTopComponent"));
setToolTipText(NbBundle.getMessage(CustomerTopComponent.class, 开发者_StackOverflow中文版"HINT_CustomerTopComponent"));
setIcon(ImageUtilities.loadImage(ICON_PATH, true));
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 390, Short.MAX_VALUE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 289, Short.MAX_VALUE)
.addContainerGap())
);
}// </editor-fold>
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
// End of variables declaration
/**
* Gets default instance. Do not use directly: reserved for *.settings files only,
* i.e. deserialization routines; otherwise you could get a non-deserialized instance.
* To obtain the singleton instance, use {@link #findInstance}.
*/
public static synchronized CustomerTopComponent getDefault() {
if (instance == null) {
instance = new CustomerTopComponent();
}
return instance;
}
/**
* Obtain the CustomerTopComponent instance. Never call {@link #getDefault} directly!
*/
public static synchronized CustomerTopComponent findInstance() {
TopComponent win = WindowManager.getDefault().findTopComponent(PREFERRED_ID);
if (win == null) {
Logger.getLogger(CustomerTopComponent.class.getName()).warning(
"Cannot find " + PREFERRED_ID + " component. It will not be located properly in the window system.");
return getDefault();
}
if (win instanceof CustomerTopComponent) {
return (CustomerTopComponent) win;
}
Logger.getLogger(CustomerTopComponent.class.getName()).warning(
"There seem to be multiple components with the '" + PREFERRED_ID
+ "' ID. That is a potential source of errors and unexpected behavior.");
return getDefault();
}
@Override
public int getPersistenceType() {
return TopComponent.PERSISTENCE_ALWAYS;
}
@Override
public void componentOpened() {
// TODO add custom code on component opening
}
@Override
public void componentClosed() {
// TODO add custom code on component closing
}
void writeProperties(java.util.Properties p) {
// better to version settings since initial version as advocated at
// http://wiki.apidesign.org/wiki/PropertyFiles
p.setProperty("version", "1.0");
// TODO store your settings
}
Object readProperties(java.util.Properties p) {
if (instance == null) {
instance = this;
}
instance.readPropertiesImpl(p);
return instance;
}
private void readPropertiesImpl(java.util.Properties p) {
String version = p.getProperty("version");
// TODO read your settings according to their version
}
@Override
protected String preferredID() {
return PREFERRED_ID;
}
}
above is netbeans application crud application reference website -- http://platform.netbeans.org/tutorials/nbm-crud.html --point no-4. after compiling above code, i m getting illegal start of type error at the line--" for (Customer c : resultList) { " and also another error on next line as illegal forward reference plz guide how to fix the above 2 errors
This code:
EntityManager entityManager = Persistence.createEntityManagerFactory("CustomerLibraryPU").createEntityManager();
Query query = entityManager.createQuery("SELECT c FROM Customer c");
List<Customer> resultList = query.getResultList();
for (Customer c : resultList) {
jTextArea1.append(c.getName() + " (" + c.getCity() + ")" + "\n");
}
Needs to be in a method or constructor, as the tutorial clearly states:
Add this to the end of the TopComponent constructor: (...)
Please check your modules source level.
Look at the module properties under sources. Maybe its a level beneath 1.5 and therefore generics and the enhanced " for ( x : y ) " syntax is not available.
I just tried to create a new module in NetBeans 6.9 and it sets the initial source level to 1.6, though.
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