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| 整数类不能改变 |
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// : appendixa:ImmutableInteger.java
// The Integer class cannot be changed.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.util.ArrayList;
import java.util.List;
public class ImmutableInteger {
public static void main(String[] args) {
List v = new ArrayList();
for (int i = 0; i < 10; i++)
v.add(new Integer(i));
// But how do you change the int inside the Integer?
}
} ///:~
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