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ãpublic interface Parent { ã
ãpublic void simpleCall(); ã
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ãpublic class Child_A implements Parent{ ãã
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ãpublic class Child_B implements Parent{
ããpublic void simpleCall(){
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ããParent pa = new Child_A(); ã
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ãParent pa = new Child_B(); ãã
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