Some one can help me with Properties()

hi, i try and i try to reasign one group of final static var, and i cant, so i see can i use the Properties() class to reasign one final static var.
import java.util.Properties;
Public class Config extends Object{
static final int EMITIDO;
static final int PAGADO;
static final int ENVIADO;
static final int SOLUCIONADO
public void Config(){
Properties defaultProps = new Properties();
try{
defaultProps.setProperty("my_new_emitido","2");
defaultProps.setProperty("my_new_pagado","3");
defaultProps.setProperty("my_new_enviado","4");
defaultProps.setProperty("my_new_solucionado","5");
EMITIDO = (new Integer(defaultProps.setProperty("my_new_emitido"))).intValue();
PAGADO = (new Integer(defaultProps.setProperty("my_new_pagado"))).intValue();
ENVIADO = (new Integer(defaultProps.setProperty("my_new_enviado"))).intValue();
SOLUCIONADO = (new Integer(defaultProps.setProperty("my_new_solucionado"))).intValue();
the compiler send me a error : cannot assign a value to final variable ABONO
some can help me please!!!

tks, yes i now but that was the only way to use them
in other class with the case statement
meabe you now other way tks.Use ifs instead of the switch.

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