import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
 
class ExtraerEmail
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
    String text = "{Telefono =0,eMail=kakaroto@hotmail.com,monto=$54977,Numero Documento=0,Origen de Pago:=Subsidio,Tipo de Pago:=Transferencia,Banco=RABOBANK CHILE,Tipo de Cuenta=CUENTA VISTA,Numero de Cuenta=0003331111}";
    final Pattern pattern = Pattern.compile("eMail=(.+?),"); //buscar valor entre eMail= y ,
    final Matcher matcher = pattern.matcher(text);
    matcher.find();
    String sEmail=matcher.group(1); //Extraer cadena
    System.out.println("Este es el email: "+ sEmail); // Prints String I want to extract    
 
 
	}
}

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