problem in overwrite using Generics

[SantaJava]

package jp.co.nec.rfidmgr.epcis;

import java.util.List;
import java.util.Map;

public class T {
public void temp(List<String> str) {

}

public void temp(List<Integer> str) {

}

public void temp(List<Map<Integer,String>> str) {

}
}

error:
Duplicate method temp(List<String>) in type T T.java
Duplicate method temp(List<Integer>) in type T T.java
Duplicate method temp(List<Map<Integer,String>>) in type T T.java

how can i overwrite a method using generics