现状 java 5+
package java.lang.Number
public abstract class Number implements java.io.Serializable
package java.lang.Integer
public final class Integer extends Number implements Comparable<Integer>
麻烦
* 直觉上 Number应该是可以 Comparable。
* 接受 Comparable<T> 的方法可以使用 Integer,有时 Integer被包成Number,就不能用了。
讨论
这样有啥不好。
public abstract class XNumber<T extends XNumber<T>> implements java.io.Serializable,Comparable<T>{
private static final long serialVersionUID = 1L;
}
public final class XLong extends XNumber<XLong> {
private static final long serialVersionUID = 1L;
@Override
public int compareTo(XLong o) {
return 0;
}
}
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