Table of Contents
What are the conventions followed by JavaBean class?
It is a java class that should follow following conventions: Must implement Serializable….Syntax for setter methods:
- It should be public in nature.
- The return-type should be void.
- The setter method should be prefixed with set.
- It should take some argument i.e. it should not be no-arg method.
What is needed to define a property of a JavaBean?
A JavaBean is a Java object that satisfies certain programming conventions: The JavaBean class must implement either Serializable or Externalizable. The JavaBean class must have a no-arg constructor. All JavaBean properties must have public setter and getter methods.
What are the methods correct for JavaBean?
To access the JavaBean class, we should use getter and setter methods.
- package mypack;
- public class Test{
- public static void main(String args[]){
- Employee e=new Employee();//object is created.
- e.setName(“Arjun”);//setting value to the object.
- System.out.println(e.getName());
- }}
What is JavaBean standard?
The JavaBeans standard provides a framework for creating objects to be used by GUI tools, including Java development environments. But in more common usage, a bean is a serializable class that follows the JavaBeans naming conventions for its properties. These naming standards make it easy to use Java introspection.
Which of the following is a valid JavaBean method signature?
Options B, C, and F are each proper JavaBean method signatures.
What is bean persistence property?
A bean has the property of persistence when its properties, fields, and state information are saved to and retrieved from storage. Component models provide a mechanism for persistence that enables the state of components to be stored in a non-volatile place for later retrieval.
Which tag is used to set a value of a JavaBean?
Which tag is used to set a value of a JavaBean? Explanation: is used to set a value of a java. util. Map object.
Which of the following is the correct way to find or instantiate a JavaBean?
The jsp:useBean action tag is used to locate or instantiate a bean class.
What is JavaBean explain introspection?
Introspection is the automatic process of analyzing a bean’s design patterns to reveal the bean’s properties, events, and methods. This process controls the publishing and discovery of bean operations and properties.
What are JavaBeans components?
JavaBeans components are Java classes that can be easily reused and composed together into applications. Any Java class that follows certain design conventions is a JavaBeans component. JavaServer Pages technology directly supports using JavaBeans components with standard JSP language elements.
Which JSP action tag can be used to get a property of a JavaBean?
JSP – Actions
| S.No. | Syntax & Purpose |
|---|---|
| 3 | jsp:setProperty Sets the property of a JavaBean. |
| 4 | jsp:getProperty Inserts the property of a JavaBean into the output. |
| 5 | jsp:forward Forwards the requester to a new page. |
| 6 | jsp:plugin Generates browser-specific code that makes an OBJECT or EMBED tag for the Java plugin. |
What are the purposes of introspection?
The use of introspection as a tool for looking inward is an important part of self-awareness and is even used in psychotherapy as a way to help clients gain insight into their own feelings and behavior.
What is correct about JSP Scriptlet?
In JavaServer Pages (JSP) technology, a scriptlet is a piece of Java-code embedded in the HTML-like JSP code. The scriptlet is everything inside the <% %> tags. Between these the user can add any valid Scriptlet i.e. any valid Java Code.
What is introspection in JavaBean?
What are some limitations of introspection?
Introspection is limited in its use; complex subjects such as learning, personality, mental disorders, and development are difficult or even impossible to study with this technique. The technique is difficult to use with children and impossible to use with animals.
Which of the following is the correct way to find or instantiate a Javabean?
What type of scriptlet code is better?
| Q. | What type of scriptlet code is better-suited to being factored forward into aservlet? |
|---|---|
| C. | code that deals with logic that relates to database access. |
| D. | code that deals with logic that relates to client scope. |
| Answer» a. code that deals with logic that is common across requests. |
What is a bean class?
A JavaBean is a specially constructed Java class written in the Java and coded according to the JavaBeans API specifications. Following are the unique characteristics that distinguish a JavaBean from other Java classes − It provides a default, no-argument constructor.
What is introspective method?
Introspection is the examination of one’s own conscious thoughts and feelings. In psychology, the process of introspection relies on the observation of one’s mental state, while in a spiritual context it may refer to the examination of one’s soul.