package br.com.rlsystem.app; 
public class Exemplo{
 
   public static void main (String args[]) {
 
	   StringBuilder sb = new StringBuilder();
	   sb.append("RL System");
	   sb.append("Treinamentos");
 
	   //Limpar StringBuilder
	   sb.delete(0, sb.length());
 
 
	   System.out.println(sb.toString());	   
 
   }
}

package br.com.rlsystem.app; 
public class Exemplo{
 
   public static void main (String args[]) {
 
	   StringBuilder sb = new StringBuilder();
	   sb.append("RL System");
	   sb.append("Treinamentos");
 
	   //Limpar StringBuilder
	   sb.setLength(0);  
 
	   System.out.println(sb.toString());	   
 
   }
}