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import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class Test {
public static void main(String[] args) {
List<String> list=Arrays.asList("1","2","3");
System.out.println(getFromRequest(list,ArrayList<String>.class));
}
public static <T> T getFromRequest(Object obj,Class<T> clazz){
return (T)obj;
}
}
public static <T> T getFromRequest(String key,Class<T> T){
return (T)request.getAttribute(key);
}
public static <T> T getFromRequest(T obj){
return obj;
}