问Java -将类方法分离为不同的文件

EN

// container that has all of your matrix math objects
public class MatrixMath {
    MatrixMath(){};
    public final MatrixAlgebra algebra = new MatrixAlgebra();
    public final MatrixSort sort = new MatrixSort();
}

// put all of the algebra type functions here
public class MatrixAlgebra {
    MatrixMultiply(){};
    public static Matrix multiply(final Matrix a, final Matrix b) {
        Matrix result;
         // do something
        return result;
    }
}

// and your sorting functions here...
public class MatrixSort {
    ...
}

// create a reference to your MatrixMath class so that you 
// can use your function.   
public class Matrix {
   final MatrixMath math = new MatrixMath();

   Matrix times(Matrix other) {
       return math.algebra.multiply(this,other);
   }
}