Question

java怎么把一个String的对象加到Integer的集合里

要应用反射的知识

Answer 1

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;

public class Two
{
public static void main(String[] args) throws IllegalArgumentException, SecurityException, IllegalAccessException, InvocationTargetException, NoSuchMethodException
{
List<Integer> c = new ArrayList<Integer>();
c.add(1);
c.add(2);

c.getClass().getMethod("add", Object.class).invoke(c, "abc");

for (int i = 0; i < c.size(); i++)
{
System.out.println(c.get(i));
}

}

}

Answer 2

String s = "1";
int i = Integer..parseInt("s");
然后你就能把i加入到Integer的集合里了

Answer 3

Integer.paretInt("");