Outbound email example:

How to write a code for outbound emailing?

public class OutboundExample {
    public Messaging.SingleEmailMessage email1 ;
    String[] toadd ;
    String[] tocc;
    string subject;
    public OutboundExample(){
        email1=new Messaging.SingleEmailMessage();
        toadd=new String[]{'creativetraining@gmail.com'};
        tocc=new String[]{'onlinebatch135@gmail.com'};
    }
    public void plaintTextBody(){
        email1.setToAddresses(toadd);
        email1.setCcAddresses(tocc);
        email1.setSubject('PlainText Body');
        email1.setPlainTextBody('This is a text body');
        Messaging.Email[] emails=new Messaging.Email[]{email1};
        Messaging.sendEMail(emails);
    }
    public void htmlBody(){
        email1.setToAddresses(toadd);
        email1.setCcAddresses(tocc);
        email1.setSubject('PlainText Body');
        email1.setHtmlBody('<h3> Hai Satish</h3><font style="color:blue">This is test mail</font>');
        Messaging.Email[] emails=new Messaging.Email[]{email1};
        Messaging.sendEMail(emails);
    }
    public void sendAttachments(){
        Contact c=[select id,Email from Contact where phone='9988'];
        String[] toAdd=new String[]{c.email};
        email1.setToAddresses(toAdd);
        email1.setCcAddresses(tocc);
        email1.setSubject('PlainText Body');
        email1.setHtmlBody('<h3> Hai Satish</h3><font style="color:blue">This is test mail</font>');
        PageReference p=Page.page1;
        Blob body=P.getContentAsPDF(); 
        Messaging.EmailFileAttachment attach=new Messaging.EmailFileAttachment();
        attach.setBody(body);
        attach.setFileName('Jan-Feb-Bill.pdf');      
        Messaging.EmailFileAttachment[] attachments=new Messaging.EmailFileAttachment[]{attach};
    email1.setFileAttachments(attachments);   
        Messaging.Email[] emails=new Messaging.Email[]{email1};
        Messaging.sendEMail(emails);
    /* Creating  Attachment with with email attachment    
        Attachment at=new Attachment();
        at.ParentId=c.id;
        at.body=body;
        at.Name='Jan-feb-Bill';
        insert at;
    */
     }
     public void sendTemplate(){        
        EmailTemplate et=[select id from EmailTemplate where name='Test'];
        email1.setTemplateId(et.id);    
        Contact c=[select id from Contact where phone='9988'];
        email1.setTargetObjectId(c.id);    
        Payment__c p=[select id from Payment__c limit 1];
        email1.setWhatId(p.id);      
        Messaging.Email[] emails=new Messaging.Email[]{email1};
        Messaging.sendEMail(emails);
     }
    public void massEmail(){
        Messaging.MassEmailMessage email1=new Messaging.MassEmailMessage();
      EmailTemplate et=[select id from EmailTemplate where name='Test'];
        email1.setTemplateId(et.id);
        Contact c=[select id,Email from Contact where phone='9988'];
        email1.setTargetObjectIds(new Id[]{c.id});
        Messaging.Email[] emails=new Messaging.Email[]{email1};
        Messaging.sendEMail(emails);
    }
   
}