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Explain JPA in Java.
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Answer / nashiinformaticssolutions
The Java Persistence API enables us to create the persistence layer for desktop and web applications. Java Persistence deals in the following:
1. Java Persistence API
2. Query Language
3. Java Persistence Criteria API
4. Object Mapping Metadata
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Draw a UML class diagram for the code fragment given below: public class StringApplet extends Applet { private Label sampleString; private Button showTheString; private ButtonHandler bHandler; private FlowLayout layout; public StringApplet() { sampleString = new Label(" "); showTheString = new Button (" Show the String"); bHandler = new ButtonHandler(); layout = new FlowLayout(); showTheString.addActionListener(bHandler); setLayout(layout); add(sampleString); add(showTheString); } class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { samplestring.setText("Good Morning"); } } } Note: The methods need not be indicated on the diagram.
when a servlet sends request for first time it uses the follwing methods a)init b)doget() c)dopost() d)service
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