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PMP 1600 Questions
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  • Logic Iterate Map and List

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    Logic Iterate Map and List

    Iterating over a Map instance, the Object is of type java.util.Map.Entry.
    Map.Entry has two properties:
    1) Key: The key under which the item is stored in the Map.
    2) Value: The value associated with the key.
    You have a ActionForm Name "EmpForm" and has a property named "empmap" that is declared as a Map and instantiated as a java.util.HashMap. In this Map, the key is a unique empId and the value is a String representing the empname;

    Logic Iterate for Map

    step 1. EmpForm code is

    package com.techfaq.form;
    public class EmpForm extends AactionForm {
    private Map empmap;
    public Map getEmpmap() {
    return empmap;
    }
    public void setEmpmap(Map empmap) {
    this.empmap = empmap;
    }
    }

    step 2. your code is

    Map empmap = new HashMap();
    empmap.put("1","nick");
    empmap.put("2","ram");
    empmap.put("3","syam");
    form.setEmpmap(empmap);

    step 3. Logic Iterate Map: retrive values : This is the code in jsp to retrive the values from Map using logic:iterate

    <logic:iterate id="emp" name="EmpForm" property="empmap">
    Emp Id: <bean:write name="emp" property="key"/>
    Emp Name: <bean:write name="emp" property="value"/>
    </logic:iterate>
    Logic Iterate for List

    step 1. Form bean : MessageForm

    package com.techfaq.form;
    public class MessageForm extends ActionForm{
    private List messageList;
    public List getMessageList() {
    return messageList;
    }
    public void setMessageList(List messageList) {
    this.messageList = messageList;
    }
    }

    step 2. bean class : Message

    package com.techfaq.beans;
    public class Message {
    private String longMsg;
    private String createdBy;
    public String getCreatedBy() {
    return createdBy;
    }
    public void setCreatedBy(String createdBy) {
    this.createdBy = createdBy;
    }
    public String getLongMsg() {
    return longMsg;
    }
    public void setLongMsg(String longMsg) {
    this.longMsg = longMsg;
    }
    }

    step 3. Logic Iterate List: retrive values : This is the code in jsp to retrive the values from List using logic:iterate

    <logic:iterate id="message" name="MessageForm" property="messageList" type="com.bean.Message" scope="request">
    <bean:write name="message" property="createdBy"/>
    <bean:write name="message" property="longMsg"/>
    </logic:iterate>
    The information you are posting should be related to java and ORACLE technology. Not political.