范例：继承抽象类 GenericMatrix IntegerMatrix -Object[][]matrix #GenericMatrix(Object[]matrix) +Object[][]getMatrix() +void setMatrix(Object[]]matrix) +Object[][]addMatrix(Object[][]secondMatrix) +Object[][]multiplyMatrix(Object[]secondMatrix) +void printResult( GenericMatrix ml.GenericMatrix m2.GenericMatrix m3,char op) #GenericMatrix createGenericMatrix( #Object add(Object ol,Object o2) #Object multiply(Object ol,Object o2) #Object zero() RationalMatrix ©2006计算机系杨厚群 All rights lefts reserved ©2006 计算机系 杨厚群 All rights & lefts reserved. 范例：继承抽象类 GenericMatrix -Object[][] matrix #GenericMatrix(Object[][] matrix) +Object[][] getMatrix() +void setMatrix(Object[][] matrix) +Object[][] addMatrix(Object[][] secondMatrix) +Object[][] multiplyMatrix(Object[][] secondMatrix) +void printResult( GenericMatrix m1, GenericMatrix m2, GenericMatrix m3, char op) #GenericMatrix createGenericMatrix() #Object add(Object o1, Object o2) #Object multiply(Object o1, Object o2) #Object zero() IntegerMatrix RationalMatrix