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写出下列程序段的运行结果classA{doublef(doublex,doubley){returnx*y;}}classBextendsA{doublef(doublex,doubley){returnx+y;}}publicclassTest{publicstaticvoidmain(Stringargs[]){Bobj=newB();System.out.println("Theprogramoutputis"+obj.f(4,6));}}

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