下列代码的执行结果为: ( )
public class Super {
public Integer getLength() { return new Integer(4); }
}
class Sub extends Super {
public Integer getLength() { return new Integer(5); }
public static void main(String[] args) {
Super superObj = new Super();
Sub subObj = new Sub();
System.out.println(superObj.getLength().toString() + "," +
subObj.getLength().toString() );
}
}
输出是什么?
A. 4,4
B. 4,5
C. 5,4
D. 编译失败.---------重定时不能改变返回类型
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