How to insert multiple records at a time?

class for inserting more than one record at a time (list of records)

public class insert100
{
public void m1()
{
List<Testing__c> lstTesting = new List<Testing__c>();
Testing__c objTest;
objTest = new Testing__c(name='Testing1',city__c='City1');
lstTesting.add(objTest);
objTest = new Testing__c(name='Testing2',city__c='City2');
lstTesting.add(objTest);
objTest = new Testing__c(name='Testing3',city__c='City3');
lstTesting.add(objTest);
objTest = new Testing__c(name='Testing4',city__c='City4');
lstTesting.add(objTest);
objTest = new Testing__c(name='Testing5',city__c='City5');
lstTesting.add(objTest);
insert lstTesting;
}
}
* In order to execute above class , go to System Log and execute as follows
insert100 obj=new insert100();
obj.m1();

 

Inserting list of records through For loop

public class insert100
{
public void m1()
{
List<Testing__c> lstTesting = new List<Testing__c>();
Testing__c objTest;
for(Integer i=6;i<=100;i++)
{
objTest=new Testing__c(name='Testing'+string.valueof(i),city__c='City'+string.valueof(i));
lstTesting.add(objTest);
}
insert lstTesting;
}
}
* In order to execute above class , go to System Log and execute as follows
insert100 obj=new insert100();
obj.m1();

 

Performing the pagination on VF page (display 2 records per page)

Visualforce page:

<apex:page sidebar="false" standardController="Testing__c" recordSetVar="records" extensions="PageDataClass">
<apex:form >
<apex:pageBlock >
<apex:pageBlockSection >
<apex:pageBlockTable value="{!records}" var="r">
<apex:column headerValue="Name">
{!r.Name}
</apex:column>
<apex:column headerValue="City">
{!r.City__c}
</apex:column>
</apex:pageBlockTable>
</apex:pageBlockSection>
<apex:commandLink value="previous" action="{!previous}"/> |&nbsp;
<apex:commandLink value="next" action="{!next}"/>
</apex:pageBlock>
</apex:form>
</apex:page>

Apex class:

public with sharing class PageDataClass {
public PageDataClass(ApexPages.StandardSetController controller) {
controller.setpagesize(2);
}
}