class Log {
String lastData = "";
void printMax5(String data) {
lastData = data;
if (data.length() > 5) {
data = data.substring(0, 5);
}
System.out.println(data);
}
}
Log log = new Log();
log.printMax5("1234567");
//printed "12345"
System.out.println("lastData = " + log.lastData);